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définition - Karl Popper
Karl Popper (n.)
1.British philosopher (born in Austria) who argued that scientific theories can never be proved to be true, but are tested by attempts to falsify them (1902-1994)
synonymes - Karl Popper
Popper, Sir Karl Raimund Popper
philosopher[ClasseHyper.]
theorician; theoritician; theorist; theoretician; theorizer; theoriser; idealogue[Classe]
métier : sciences humaines (fr)[Classe]
bookman, scholar, scholarly person, student[Hyper.]
philosophy - philosophic, philosophical[Dérivé]
philosopher[Hyper.]
Karl Popper (n.)↕
CH FRS FBA
Sir Karl Popper c. 1980s
Karl Raimund Popper
Vienna, Austria-Hungary
17 September 1994(1994-09-17) (aged 92)
Critical rationalism
Main interests
Origin of life
Notable ideas
Falsificationism
Universal evolutionary trial and error model of life and knowledge
Propensity interpretation
Open society
Cosmological pluralism
Modified essentialism
Axiomatic formalization of probability
Active Darwinism
Spearhead model
Truthlikeness
Objective Hermeneutics
Socrates · Lycophron · Aristotle · Kant · Schopenhauer · Hegel · Einstein · Kierkegaard · Wittgenstein · Vienna Circle · Hayek · Tarski · Selz · Russell · Campbell · Burke · Mill · Hume · Wächtershäuser
Virtually all philosophy of science since 1930s · Hayek · Friedman · Lakatos · Feyerabend · Soros · Miller · Agassi · Bartley · Gombrich · Jarvie · Dahrendorf · Levinson · Schmidt · Munz · Magee · Lorenz · Shearmur · Medawar · Dimitrakos · Albert · Gellner · Soroush · Taleb · Deutsch
Sir Karl Raimund Popper, CH FRS[1] FBA (28 July 1902 – 17 September 1994) was an Austro-British[2] philosopher and professor at the London School of Economics.[3] He is generally regarded as one of the greatest philosophers of science of the 20th century;[4][5] he also wrote extensively on social and political philosophy. In 1992 he was awarded the Kyoto Prize in Arts and Philosophy for "symbolizing the open spirit of the 20th century"[6] and for his "enormous influence on the formation of the modern intellectual climate"[7].
Popper is known for his attempt to repudiate the classical observationalist/inductivist form of scientific method in favour of empirical falsification. He is also known for his opposition to the classical justificationist account of knowledge which he replaced with critical rationalism, "the first non justificational philosophy of criticism in the history of philosophy".[8] In political discourse, he is known for his vigorous defence of liberal democracy and the principles of social criticism that he came to believe made a flourishing "open society" possible.
2 Philosophy
2.1 Philosophy of science
2.1.1 Falsifiability
2.1.2 Truth
2.2 Philosophy of arithmetic
2.3 Political philosophy
2.3.1 The paradox of tolerance
2.4 Problem of induction
2.5 Free will
3 Influence
3.1 Darwinism
4 Criticism
4.2 Other criticism
Karl Popper was born in Vienna (then in Austria-Hungary) in 1902, to upper middle-class parents. All of Karl Popper's grandparents were Jewish, but the Popper family converted to Lutheranism before Karl was born.[9] Karl's father Simon Siegmund Carl Popper was a lawyer from Bohemia, and mother Jenny Schiff was of Silesian and Hungarian descent. After establishing themselves in Vienna, the Poppers made a rapid social climb in Viennese society: Simon Siegmund Carl became a legal partner[clarification needed] of Vienna's liberal mayor Raimond Grübl and, after his death in 1898, took over the firm (Karl received his middle name from the mayor).[9]
Popper received a Lutheran upbringing and was educated at the University of Vienna.[10] His father was a doctor of law at the Vienna University and a bibliophile who had 12,000–14,000 volumes in his personal library.[11] Popper inherited both the library and the disposition from him.[12]
In 1919, Popper became attracted by Marxism and subsequently joined the Association of Socialist School Students. He also became a member of the Social Democratic Workers' Party of Austria, which was at that time a party that fully adopted the Marxist ideology.[13] After the June 15, 1919 street battle in the Hörlgasse, when police shot eight of his unarmed party comrades, he became disillusioned by what he saw to be the pseudo-scientific historical materialism of Marx, abandoned the ideology, and remained a supporter of social liberalism throughout his life.
In 1928, he earned a doctorate in psychology, under the supervision of Karl Bühler. His dissertation was entitled "Die Methodenfrage der Denkpsychologie" (The question of method in cognitive psychology).[14] Then, from 1930 to 1936, he taught secondary school. Popper published his first book, Logik der Forschung (The Logic of Scientific Discovery), in 1934. Here, he criticised psychologism, naturalism, inductionism, and logical positivism, and put forth his theory of potential falsifiability as the criterion demarcating science from non-science.
In 1937, the rise of Nazism and the threat of the Anschluss led Popper to emigrate to New Zealand, where he became lecturer in philosophy at Canterbury University College New Zealand (at Christchurch). It was here that he wrote his influential work The Open Society and its Enemies. In 1946, he moved to England to become reader in logic and scientific method at the London School of Economics. Three years later, he was appointed as professor of logic and scientific method at the University of London in 1949. Popper was president of the Aristotelian Society from 1958 to 1959. He was knighted by Queen Elizabeth II in 1965, and was elected a Fellow of the Royal Society in 1976.[1] He retired from academic life in 1969, though he remained intellectually active for the rest of his life. He was invested with the Insignia of a Companion of Honour in 1982. Popper was a member of the Academy of Humanism and described himself as an agnostic, showing respect for the moral teachings of Judaism and Christianity.
Popper won many awards and honours in his field, including the Lippincott Award of the American Political Science Association, the Sonning Prize, and fellowships in the Royal Society,[1] British Academy, London School of Economics, King's College London, Darwin College, Cambridge, and Charles University, Prague. Austria awarded him the Grand Decoration for Services to the Republic of Austria in Gold.
Popper died in Croydon, UK at the age of 92 on 17 September 1994. After cremation, his ashes were taken to Vienna and buried at Lainzer cemetery adjacent to the ORF Centre, where his wife Josefine Anna Henninger, who had died in Austria several years before, had already been buried.[15]
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Falsifiability
Popper coined the term "critical rationalism" to describe his philosophy. The term indicates his rejection of classical empiricism, and the classical observationalist-inductivist account of science that had grown out of it. Popper argued strongly against the latter, holding that scientific theories are abstract in nature, and can be tested only indirectly, by reference to their implications. He also held that scientific theory, and human knowledge generally, is irreducibly conjectural or hypothetical, and is generated by the creative imagination in order to solve problems that have arisen in specific historio-cultural settings.
Logically, no number of positive outcomes at the level of experimental testing can confirm a scientific theory, but a single counterexample is logically decisive: it shows the theory, from which the implication is derived, to be false. The term "falsifiable" does not mean something is made false, but rather that, if it is false, it can be shown by observation or experiment. Popper's account of the logical asymmetry between verification and falsifiability lies at the heart of his philosophy of science. It also inspired him to take falsifiability as his criterion of demarcation between what is, and is not, genuinely scientific: a theory should be considered scientific if, and only if, it is falsifiable. This led him to attack the claims of both psychoanalysis and contemporary Marxism to scientific status, on the basis that their theories are not falsifiable.
Popper also wrote extensively against the famous Copenhagen interpretation of quantum mechanics. He strongly disagreed with Niels Bohr's instrumentalism and supported Albert Einstein's realist approach to scientific theories about the universe. Popper's falsifiability resembles Charles Peirce's nineteenth century fallibilism. In Of Clocks and Clouds (1966), Popper remarked that he wished he had known of Peirce's work earlier.
In All Life is Problem Solving, Popper sought to explain the apparent progress of scientific knowledge — that is, how it is that our understanding of the universe seems to improve over time. This problem arises from his position that the truth content of our theories, even the best of them, cannot be verified by scientific testing, but can only be falsified. Again, in this context the word 'falsified' does not refer to something being 'fake'; rather, that something can be (i.e., is capable of being) shown to be false by observation or experiment. Some things simply do not lend themselves to being shown to be false, and therefore, are not falsifiable. If so, then how is it that the growth of science appears to result in a growth in knowledge? In Popper's view, the advance of scientific knowledge is an evolutionary process characterized by his formula:
In response to a given problem situation ( ), a number of competing conjectures, or tentative theories ( ), are systematically subjected to the most rigorous attempts at falsification possible. This process, error elimination ( ), performs a similar function for science that natural selection performs for biological evolution. Theories that better survive the process of refutation are not more true, but rather, more "fit"—in other words, more applicable to the problem situation at hand ( ). Consequently, just as a species' biological fitness does not ensure continued survival, neither does rigorous testing protect a scientific theory from refutation in the future. Yet, as it appears that the engine of biological evolution has produced, over time, adaptive traits equipped to deal with more and more complex problems of survival, likewise, the evolution of theories through the scientific method may, in Popper's view, reflect a certain type of progress: toward more and more interesting problems ( ). For Popper, it is in the interplay between the tentative theories (conjectures) and error elimination (refutation) that scientific knowledge advances toward greater and greater problems; in a process very much akin to the interplay between genetic variation and natural selection.
As early as 1934, Popper wrote of the search for truth as "one of the strongest motives for scientific discovery."[citation needed] Still, he describes in Objective Knowledge (1972) early concerns about the much-criticized notion of truth as correspondence. Then came the semantic theory of truth formulated by the logician Alfred Tarski and published in 1933. Popper writes of learning in 1935 of the consequences of Tarski's theory, to his intense joy. The theory met critical objections to truth as correspondence and thereby rehabilitated it. The theory also seemed, in Popper's eyes, to support metaphysical realism and the regulative idea of a search for truth.
According to this theory, the conditions for the truth of a sentence as well as the sentences themselves are part of a metalanguage. So, for example, the sentence "Snow is white" is true if and only if snow is white. Although many philosophers have interpreted, and continue to interpret, Tarski's theory as a deflationary theory, Popper refers to it as a theory in which "is true" is replaced with "corresponds to the facts". He bases this interpretation on the fact that examples such as the one described above refer to two things: assertions and the facts to which they refer. He identifies Tarski's formulation of the truth conditions of sentences as the introduction of a "metalinguistic predicate" and distinguishes the following cases:
"John called" is true.
"It is true that John called."
The first case belongs to the metalanguage whereas the second is more likely to belong to the object language. Hence, "it is true that" possesses the logical status of a redundancy. "Is true", on the other hand, is a predicate necessary for making general observations such as "John was telling the truth about Phillip."
Upon this basis, along with that of the logical content of assertions (where logical content is inversely proportional to probability), Popper went on to develop his important notion of verisimilitude or "truthlikeness". The intuitive idea behind verisimilitude is that the assertions or hypotheses of scientific theories can be objectively measured with respect to the amount of truth and falsity that they imply. And, in this way, one theory can be evaluated as more or less true than another on a quantitative basis which, Popper emphasizes forcefully, has nothing to do with "subjective probabilities" or other merely "epistemic" considerations.
The simplest mathematical formulation that Popper gives of this concept can be found in the tenth chapter of Conjectures and Refutations. Here he defines it as:
where is the verisimilitude of a, is a measure of the content of truth of a, and is a measure of the content of the falsity of a.
Knowledge, for Popper, was objective, both in the sense that it is objectively true (or truthlike), and also in the sense that knowledge has an ontological status (i.e., knowledge as object) independent of the knowing subject (Objective Knowledge: An Evolutionary Approach, 1972). He proposed three worlds (see Popperian cosmology): World One, being the physical world, or physical states; World Two, being the world of mind, or mental states, ideas, and perceptions; and World Three, being the body of human knowledge expressed in its manifold forms, or the products of the second world made manifest in the materials of the first world (i.e.–books, papers, paintings, symphonies, and all the products of the human mind). World Three, he argued, was the product of individual human beings in exactly the same sense that an animal path is the product of individual animals, and that, as such, has an existence and evolution independent of any individual knowing subjects. The influence of World Three, in his view, on the individual human mind (World Two) is at least as strong as the influence of World One. In other words, the knowledge held by a given individual mind owes at least as much to the total accumulated wealth of human knowledge, made manifest, as to the world of direct experience. As such, the growth of human knowledge could be said to be a function of the independent evolution of World Three. Many contemporary philosophers have not embraced Popper's Three World conjecture, due mostly, it seems, to its resemblance to Cartesian dualism.
Philosophy of arithmetic
Popper's principle of falsifiability runs into prima facie difficulties when the epistemological status of mathematics is considered. It is difficult to conceive how simple statements of arithmetic, such as "2 + 2 = 4", could ever be shown to be false. If they are not open to falsification they can not be scientific. If they are not scientific, it needs to be explained how they can be informative about real world objects and events.
Popper's solution [16] was an original contribution in the philosophy of mathematics. His idea was that a number statement such as "2 apples + 2 apples = 4 apples" can be taken in two senses. In one sense it is irrefutable and logically true, in the second sense it is factually true and falsifiable. Concisely, the pure mathematics "2 + 2 = 4" is always true, but, when the formula is applied to real world apples, it is open to falsification.[17]
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In The Open Society and Its Enemies and The Poverty of Historicism, Popper developed a critique of historicism and a defence of the 'Open Society'. Popper considered historicism to be the theory that history develops inexorably and necessarily according to knowable general laws towards a determinate end. He argued that this view is the principal theoretical presupposition underpinning most forms of authoritarianism and totalitarianism. He argued that historicism is founded upon mistaken assumptions regarding the nature of scientific law and prediction. Since the growth of human knowledge is a causal factor in the evolution of human history, and since "no society can predict, scientifically, its own future states of knowledge",[citation needed] it follows, he argued, that there can be no predictive science of human history. For Popper, metaphysical and historical indeterminism go hand in hand. In After The Open Society, which was published posthumously, a large collection of his previously unpublished and uncollected essays on social and political topics was assembled. In this, one can trace his ideas from material that pre-dated The Open Society to something that was completed just as he died.
In a 1992 lecture, Popper explained the connection between his political philosophy and his philosophy of science. As he stated, he was in his early years impressed by communism and also active in the Austrian Communist party. What had a profound effect on him was an event that happened in 1918: during a riot, caused by the Communists, the police shot several people, including some of Popper's friends. When Popper later told the leaders of the Communist party about this, they responded by stating that this loss of life was necessary in working towards the inevitable workers' revolution. This statement did not convince Popper and he started to think about what kind of reasoning would justify such a statement. He later concluded that there could not be any justification for it, and this was the start of his later criticism of historicism.
In 1947, Popper founded with Friedrich Hayek, Milton Friedman, Ludwig von Mises and others the Mont Pelerin Society to defend classical liberalism, in the spirit of the Open Society.
The paradox of tolerance
Main article: Paradox of tolerance
Although Popper was an advocate of toleration, he said that intolerance should not be tolerated, for if tolerance allowed intolerance to succeed completely, tolerance itself would be threatened. In The Open Society and Its Enemies, he argued:
Unlimited tolerance must lead to the disappearance of tolerance. If we extend unlimited tolerance even to those who are intolerant, if we are not prepared to defend a tolerant society against the onslaught of the intolerant, then the tolerant will be destroyed, and tolerance with them.[citation needed]
The utterance of intolerant philosophies should not always be suppressed, "as long as we can counter them by rational argument and keep them in check by public opinion."[citation needed] However:
we should claim the right to suppress them if necessary even by force; for it may easily turn out that they are not prepared to meet us on the level of rational argument, but begin by denouncing all argument; they may forbid their followers to listen to rational argument, because it is deceptive, and teach them to answer arguments by the use of their fists or pistols.[citation needed]
Furthermore, in support of human rights legislation in the second half of the 20th century, he stated:
We should therefore claim, in the name of tolerance, the right not to tolerate the intolerant. We should claim that any movement preaching intolerance places itself outside the law, and we should consider incitement to intolerance and persecution as criminal, in the same way as we should consider incitement to murder, or to kidnapping, or to the revival of the slave trade, as criminal.[18]
Problem of induction
Among his contributions to philosophy is his attempt to answer the philosophical problem of induction. Popper claims to have found a solution to the problem of induction. He states that while there is no way to prove that the sun will rise, it is possible to formulate the theory that every day the sun will rise; if it does not rise on some particular day, the theory will be falsified and will have to be replaced by a different one. Until that day, there is no need to reject the assumption that the theory is true. Neither is it rational according to Popper to instead make the more complex assumption that the sun will rise until a given day, but will stop doing so the day after, or similar statements with additional conditions.
Such a theory would be true with higher probability, because it cannot be attacked so easily: to falsify the first one, it is sufficient to find that sun has stopped rising; to falsify the second one, one additionally needs the assumption that the given day has not yet been reached. Popper held that it is the least likely, or most easily falsifiable, or simplest theory (attributes which he identified as all the same thing) that explains known facts that one should rationally prefer. His opposition to positivism, which held that it is the theory most likely to be true that one should prefer, here becomes very apparent. It is impossible, Popper argues, to ensure a theory to be true; it is more important that their falsity can be detected as easily as possible.
Popper and David Hume agreed that there is often a psychological belief that the sun will rise tomorrow, but both denied that there is logical justification for the supposition that it will, simply because it always has in the past. Popper writes, "I approached the problem of induction through Hume. Hume, I felt, was perfectly right in pointing out that induction cannot be logically justified." (Conjectures and Refutations, p. 55)
To Popper, who was an anti-justificationist, traditional philosophy is misled by the false principle of sufficient reason. He thinks that no assumption can ever be or needs ever to be justified, so a lack of justification is not a justification for doubt. Instead, theories should be tested and scrutinized. It is not the goal to bless theories with claims of certainty or justification, but to eliminate errors in them. He writes, "there are no such things as good positive reasons; nor do we need such things [...] But [philosophers] obviously cannot quite bring [themselves] to believe that this is my opinion, let alone that it is right" (The Philosophy of Karl Popper, p. 1043)
Popper and John Eccles speculated on the problem of free will for many years generally agreeing on an interactionist dualist theory of mind. However, although Popper was a body-mind dualist, he did not think that the mind is a substance separate from the body: he thought that mental or psychological properties or aspects of people are distinct from physical ones.[19]
When he gave the second Arthur Holly Compton Memorial Lecture in 1965, Popper revisited the idea of quantum indeterminacy as a source of human freedom. Eccles had suggested that "critically poised neurons" might be influenced by the mind to assist in a decision. Popper criticized Compton's idea of amplified quantum events affecting the decision. He wrote:
The idea that the only alternative to determinism is just sheer chance was taken over by Schlick, together with many of his views on the subject, from Hume, who asserted that 'the removal' of what he called 'physical necessity' must always result in 'the same thing with chance. As objects must either be conjoin'd or not,... 'tis impossible to admit of any medium betwixt chance and an absolute necessity'.
I shall later argue against this important doctrine according to which the alternative to determinism is sheer chance. Yet I must admit that the doctrine seems to hold good for the quantum-theoretical models which have been designed to explain, or at least to illustrate, the possibility of human freedom. This seems to be the reason why these models are so very unsatisfactory.[20]
Hume's and Schlick's ontological thesis that there cannot exist anything intermediate between chance and determinism seems to me not only highly dogmatic (not to say doctrinaire) but clearly absurd; and it is understandable only on the assumption that they believed in a complete determinism in which chance has no status except as a symptom of our ignorance.[21]
Popper called not for something between chance and necessity but for a combination of randomness and control to explain freedom, though not yet explicitly in two stages with random chance before the controlled decision, saying, "freedom is not just chance but, rather, the result of a subtle interplay between something almost random or haphazard, and something like a restrictive or selective control."[22]
Then in his 1977 book with John Eccles, The Self and its Brain, Popper finally formulates the two-stage model in a temporal sequence. And he compares free will to Darwinian evolution and natural selection:
New ideas have a striking similarity to genetic mutations. Now, let us look for a moment at genetic mutations. Mutations are, it seems, brought about by quantum theoretical indeterminacy (including radiation effects). Accordingly, they are also probabilistic and not in themselves originally selected or adequate, but on them there subsequently operates natural selection which eliminates inappropriate mutations. Now we could conceive of a similar process with respect to new ideas and to free-will decisions, and similar things.
That is to say, a range of possibilities is brought about by a probabilistic and quantum mechanically characterized set of proposals, as it were - of possibilities brought forward by the brain. On these there then operates a kind of selective procedure which eliminates those proposals and those possibilities which are not acceptable to the mind.[23]
Other thinkers who have formulated a two-stage model for free will include William James, Henri Poincaré, Arthur Compton, Henry Margenau, and Daniel Dennett.
Sir Karl Popper in 1990.
Popper played a vital role in establishing the philosophy of science as a vigorous, autonomous discipline within analytic philosophy, through his own prolific and influential works, and also through his influence on his own contemporaries and students. Popper founded in 1946 the Department of Philosophy, Logic and Scientific Method at the London School of Economics and there lectured and influenced both Imre Lakatos and Paul Feyerabend, two of the foremost philosophers of science in the next generation of philosophy of science. (Lakatos significantly modified Popper's position, and Feyerabend repudiated it entirely, but the work of both is deeply influenced by Popper and engaged with many of the problems that Popper set.)
While there is some dispute as to the matter of influence, Popper had a long-standing and close friendship with economist Friedrich Hayek, who was also brought to the London School of Economics from Vienna. Each found support and similarities in each other's work, citing each other often, though not without qualification. In a letter to Hayek in 1944, Popper stated, "I think I have learnt more from you than from any other living thinker, except perhaps Alfred Tarski."[24] Popper dedicated his Conjectures and Refutations to Hayek. For his part, Hayek dedicated a collection of papers, Studies in Philosophy, Politics, and Economics, to Popper, and in 1982 said, "...ever since his Logik der Forschung first came out in 1934, I have been a complete adherent to his general theory of methodology."[25]
Popper also had long and mutually influential friendships with art historian Ernst Gombrich, biologist Peter Medawar, and neuro-scientist John Carew Eccles.
Popper's influence, both through his work in philosophy of science and through his political philosophy, has also extended beyond the academy. One of Popper's students at the London School of Economics was the billionaire investor George Soros,[citation needed] among whose philanthropic foundations is the Open Society Institute, a think-tank named in honor of Popper's The Open Society and Its Enemies.[citation needed]
Sir Karl Popper's gravesite in Lainzer Friedhof, near Vienna.
Popperian philosophy also inspired the creation of Taking Children Seriously, a libertarian movement which noticed that Popper's general theory of knowledge creation does not differentiate between adults and children.
The creation–evolution controversy in the United States raises the issue of whether creationistic ideas may be legitimately called science and whether evolution itself may be legitimately called science. In the debate, both sides and even courts in their decisions have frequently invoked Popper's criterion of falsifiability. In this context, passages written by Popper are frequently quoted in which he speaks about such issues himself. For example, he famously stated "Darwinism is not a testable scientific theory, but a metaphysical research program — a possible framework for testable scientific theories." He continued:
And yet, the theory is invaluable. I do not see how, without it, our knowledge could have grown as it has done since Darwin. In trying to explain experiments with bacteria which become adapted to, say, penicillin, it is quite clear that we are greatly helped by the theory of natural selection. Although it is metaphysical, it sheds much light upon very concrete and very practical researches. It allows us to study adaptation to a new environment (such as a penicillin-infested environment) in a rational way: it suggests the existence of a mechanism of adaptation, and it allows us even to study in detail the mechanism at work.[26]
He also noted that theism, presented as explaining adaptation, "was worse than an open admission of failure, for it created the impression that an ultimate explanation had been reached."[27]
Popper later said:
When speaking here of Darwinism, I shall speak always of today's theory - that is Darwin's own theory of natural selection supported by the Mendelian theory of heredity, by the theory of the mutation and recombination of genes in a gene pool, and by the decoded genetic code. This is an immensely impressive and powerful theory. The claim that it completely explains evolution is of course a bold claim, and very far from being established. All scientific theories are conjectures, even those that have successfully passed many severe and varied tests. The Mendelian underpinning of modern Darwinism has been well tested, and so has the theory of evolution which says that all terrestrial life has evolved from a few primitive unicellular organisms, possibly even from one single organism.[27]
He explained that the difficulty of testing had led some people to describe natural selection as a tautology, and that he too had in the past described the theory as 'almost tautological', and had tried to explain how the theory could be untestable (as is a tautology) and yet of great scientific interest:
My solution was that the doctrine of natural selection is a most successful metaphysical research programme. It raises detailed problems in many fields, and it tells us what we would expect of an acceptable solution of these problems. I still believe that natural selection works in this way as a research programme. Nevertheless, I have changed my mind about the testability and logical status of the theory of natural selection; and I am glad to have an opportunity to make a recantation.[27]
Popper summarized his new view as follows:
The theory of natural selection may be so formulated that it is far from tautological. In this case it is not only testable, but it turns out to be not strictly universally true. There seem to be exceptions, as with so many biological theories; and considering the random character of the variations on which natural selection operates, the occurrence of exceptions is not surprising. Thus not all phenomena of evolution are explained by natural selection alone. Yet in every particular case it is a challenging research program to show how far natural selection can possibly be held responsible for the evolution of a particular organ or behavioral program.[28]
These frequently quoted passages are only a very small part of what Popper wrote on the issue of evolution, however, and give the wrong impression that he mainly discussed questions of its falsifiability. Popper never invented this criterion to give justifiable use of words like science. In fact, Popper says at the beginning of Logic of Scientific Discovery that it is not his plan to define science, and that science can in fact be defined quite arbitrarily.
Popper had his own sophisticated views on evolution that go much beyond what the frequently-quoted passages say.[29] In effect, Popper agreed with some of the points of both creationists and naturalists, but also disagreed with both views on crucial aspects. Popper understood the universe as a creative entity that invents new things, including life, but without the necessity of something like a god, especially not one who is pulling strings from behind the curtain. He said that evolution must, as the creationists say, work in a goal-directed way[30] but disagreed with their view that it must necessarily be the hand of god that imposes these goals onto the stage of life.
Instead, he formulated the spearhead model of evolution, a version of genetic pluralism. According to this model, living organisms themselves have goals, and act according to these goals, each guided by a central control (in its most sophisticated form, this is the brain of humans, but controls also exist in much less sophisticated ways for species of lower complexity, such as the amoeba). These goals bring the purpose into the world. Mutations in the genes that determine the structure of the control may then cause drastic changes in behaviour, preferences and goals, without having an impact on the organism's phenotype. Popper postulates that such purely behavioral changes are less likely to be lethal for the organism compared to drastic changes of the phenotype.[citation needed]
Popper contrasts his views with the notion of the "hopeful monster" that has large phenotype mutations and calls it the "hopeful behavioral monster". After behavior has changed radically, small but quick changes of the phenotype follow to make the organism fitter to its changed goals. This way it looks as if the phenotype were changing guided by some invisible hand, while it is merely natural selection working in combination with the new behaviour. For example, according to this hypothesis, the eating habits of the giraffe must have changed before its elongated neck evolved. Popper contrasted this view as evolution from within (the organism actively trying to discover new ways of life and being on a quest for conquering new ecological niches), with the naturalistic evolution from without (which has the picture of a hostile environment only trying to kill the mostly passive organism, or perhaps segregate some of its groups).
Popper's view is somewhat compatible with the central tenets of Intelligent Design, claiming that the intelligent cause seen as necessary by ID is simply natural (the intelligence of living beings themselves), not supernatural.
Popper was a key figure encouraging patent lawyer Günter Wächtershäuser to publish his iron–sulfur world theory on abiogenesis and his criticism of "soup" theory.
Most criticisms of Popper's philosophy are of the falsification, or error elimination, element in his account of problem solving. In interpreting these, it is important to bear in mind[editorializing] the aims of his idea. It is intended as an ideal, practical method of effective human problem solving; as such, the current conclusions of science are stronger than pseudo-sciences or non-sciences, insofar as they have survived this particularly vigorous selection method. He does not argue that any such conclusions are therefore true, or that this describes the actual methods of any particular scientist.[citation needed]
Rather, it is a recommended ideal method that, if enacted by a system or community, will over time lead to slow but steady progress of a sort (relative to how well the system or community enacts the method). It has been suggested that Popper's ideas are often mistaken for a hard logical account of truth because of the historical co-incidence of their appearing at the same time as logical positivism, the followers of which mistook his aims for their own.[31]
The Quine-Duhem thesis argues that it's impossible to test a single hypothesis on its own, since each one comes as part of an environment of theories. Thus we can only say that the whole package of relevant theories has been collectively falsified, but cannot conclusively say which element of the package must be replaced. An example of this is given by the discovery of the planet Neptune: when the motion of Uranus was found not to match the predictions of Newton's laws, the theory "There are seven planets in the solar system" was rejected, and not Newton's laws themselves. Popper discussed this critique of naïve falsificationism in Chapters 3 & 4 of The Logic of Scientific Discovery. For Popper, theories are accepted or rejected via a sort of selection process. Theories that say more about the way things appear are to be preferred over those that do not; the more generally applicable a theory is, the greater its value. Thus Newton's laws, with their wide general application, are to be preferred over the much more specific "the solar system has seven planets".[dubious – discuss]
Thomas Kuhn's influential book The Structure of Scientific Revolutions argued that scientists work in a series of paradigms, and that falsificationist methodologies would make science impossible:
No theory ever solves all the puzzles with which it is confronted at a given time; nor are the solutions already achieved often perfect. On the contrary, it is just the incompleteness and imperfection of the existing data-theory fit that, at any given time, define many of the puzzles that characterize normal science. If any and every failure to fit were ground for theory rejection, all theories ought to be rejected at all times. On the other hand, if only severe failure to fit justifies theory rejection, then the Popperians will require some criterion of 'improbability' or of 'degree of falsification.' In developing one they will almost certainly encounter the same network of difficulties that has haunted the advocates of the various probabilistic verification theories [that the evaluative theory cannot itself be legitimated without appeal to another evaluative theory, leading to regress][32]
Popper's student Imre Lakatos attempted to reconcile Kuhn's work with falsificationism by arguing that science progresses by the falsification of research programs rather than the more specific universal statements of naïve falsificationism. Another of Popper's students Paul Feyerabend ultimately rejected any prescriptive methodology, and argued that the only universal method characterizing scientific progress was anything goes.
Popper claimed to have recognized already in the 1934 version of his Logic of Discovery a fact later stressed by Kuhn, "that scientists necessarily develop their ideas within a definite theoretical framework", and to that extent to have anticipated Kuhn's central point about 'normal science'.[33] (But Popper criticised what he saw as Kuhn's relativism.[34]) Also, in his collection Conjectures and Refutations: The Growth of Scientific Knowledge (Harper & Row, 1963), Popper writes, "Science must begin with myths, and with the criticism of myths; neither with the collection of observations, nor with the invention of experiments, but with the critical discussion of myths, and of magical techniques and practices. The scientific tradition is distinguished from the pre-scientific tradition in having two layers. Like the latter, it passes on its theories; but it also passes on a critical attitude towards them. The theories are passed on, not as dogmas, but rather with the challenge to discuss them and improve upon them."
Another objection is that it is not always possible to demonstrate falsehood definitively, especially if one is using statistical criteria to evaluate a null hypothesis. More generally it is not always clear, if evidence contradicts a hypothesis, that this is a sign of flaws in the hypothesis rather than of flaws in the evidence. However, this is a misunderstanding of what Popper's philosophy of science sets out to do. Rather than offering a set of instructions that merely need to be followed diligently to achieve science, Popper makes it clear in The Logic of Scientific Discovery that his belief is that the resolution of conflicts between hypotheses and observations can only be a matter of the collective judgment of scientists, in each individual case.[35]
Popper's falsificationism can be questioned logically: it is not clear how Popper would deal with a statement like "for every metal, there is a temperature at which it will melt." The hypothesis cannot be falsified by any possible observation, for there will always be a higher temperature than tested at which the metal may in fact melt, yet it seems to be a valid scientific hypothesis. These examples were pointed out by Carl Gustav Hempel. Hempel came to acknowledge that Logical Positivism's verificationism was untenable, but argued that falsificationism was equally untenable on logical grounds alone. The simplest response to this is that, because Popper describes how theories attain, maintain and lose scientific status, individual consequences of currently accepted scientific theories are scientific in the sense of being part of tentative scientific knowledge, and both of Hempel's examples fall under this category. For instance, atomic theory implies that all metals melt at some temperature.
An early adversary of so-called critical rationalism, Karl-Otto Apel attempted a comprehensive refutation of Popper's philosophy. In Transformation der Philosophie (1973), Apel charged Popper with being guilty of, amongst other things, a pragmatic contradiction.[36]
Other criticism
It has been argued that Popper's student Imre Lakatos transformed Popper's philosophy using historicism and updated Hegelian historiographic ideas.[37][38]
Ludwig Wittgenstein was accused of brandishing a poker at Popper during a meeting of the Cambridge Moral Sciences Club, when they argued about whether issues in philosophy were real or just linguistic puzzles. Wittgenstein's friends say he was merely handling a poker, but Popper used the situation to make a joke at Wittgenstein's expense.[39][40]
Charles Taylor accuses Popper of exploiting his worldwide fame as an epistemologist to diminish the importance of philosophers of the 20th century continental tradition. According to Taylor, Popper's criticisms are completely baseless, but they are received with an attention and respect that Popper's "intrinsic worth hardly merits".[41] William W. Bartley defended Popper against such allegations: "Sir Karl Popper is not really a participant in the contemporary professional philosophical dialogue; quite the contrary, he has ruined that dialogue. If he is on the right track, then the majority of professional philosophers the world over has wasted or is wasting their intellectual careers. The gulf between Popper's way of doing philosophy and that of the bulk of professional philosophers is as great as that between astronomy and astrology."[42]
In 2004, philosopher and psychologist Michel ter Hark (Groningen, The Netherlands) published a book, called Popper, Otto Selz and the rise of evolutionary epistemology, ISBN 0-521-83074-5, in which he claimed that Popper took some of his ideas from his tutor, the German psychologist Otto Selz. Selz himself never published his ideas, partly because of the rise of Nazism which forced him to quit his work in 1933, and the prohibition of referring to Selz' work. Popper, the historian of ideas and his scholarship, is criticized in some academic quarters, for his rejection of Plato, Hegel and Marx.[43]
According to John N. Gray, Popper held that "a theory is scientific only in so far as it is falsifiable, and should be given up as soon as it is falsified." [44] By applying Popper's account of scientific method, Gray's Straw Dogs states that this would have "killed the theories of Darwin and Einstein at birth." When they were first advanced, Gray claims, each of them was "at odds with some available evidence; only later did evidence become available that gave them crucial support."[45] Against this, Gray seeks to establish the irrationalist thesis that "the progress of science comes from acting against reason." [46]
Gray does not, however, give any indication of what available evidence these theories were at odds with, and his appeal to "crucial support" illustrates the very inductivist approach to science that Popper sought to show was logically illegitimate. For, according to Popper, Einstein's theory was at least equally as well corroborated as Newton's upon its initial conception; they both equally well accounted for all the hitherto available evidence. Moreover, since Einstein also explained the empirical refutations of Newton's theory, general relativity was immediately deemed suitable for tentative acceptance on the Popperian account.[47] Indeed, Popper wrote, several decades before Gray's criticism, in reply to a critical essay by Imre Lakatos:
It is true that I have used the terms "elimination", and even "rejection" when discussing "refutation". But it is clear from my main discussion that these terms mean, when applied to a scientific theory, that it is eliminated as a contender for the truth- that is, refuted, but not necessarily abandoned. Moreover, I have often pointed out that any such refutation is fallible. It is a typical matter of conjecture and of risk-taking whether or not we accept a refutation and, furthermore, of whether we "abandon" a theory or, say, only modify it, or even stick to it, and try to find some alternative, and methodologically acceptable, way round the problem involved. That I do not conflate even admitted falsity with the need to abandon a theory may be seen from the fact that I have frequently pointed out, that Einstein regarded general relativity as false, yet as a better approximation to the truth than Newton's gravitational theory. He certainly did not "abandon" it. But he worked to the end of his life in an attempt to improve upon it by way of a further generalization.[48]
Calculus of predispositions
Liberalism in Austria
Popper's experiment (quantum mechanics)
Popperian cosmology
Predispositioning theory
The Foundations of Psychoanalysis
Kyoto Prize in Arts and Philosophy
Kyoto Prize
^ a b c Miller, D. (1997). "Sir Karl Raimund Popper, C. H., F. B. A. 28 July 1902--17 September 1994.: Elected F.R.S. 1976". Biographical Memoirs of Fellows of the Royal Society 43: 369. DOI:10.1098/rsbm.1997.0021. edit
^ Watkins, J. Obituary of Karl Popper, 1902–1994. Proceedings of the British Academy, 94, pp. 645–684
^ Popper was knighted in 1965, under the British Labour government of Harold Wilson.
^ See Stephen Thornton, "Karl Popper", in The Stanford Encyclopedia of Philosophy (Summer 2009 Edition), Edward N. Zalta (ed.)
^ Horgan, J. (1992) Profile: Karl R. Popper – The Intellectual Warrior, Scientific American 267(5), 38-44.
^ "Karl Raimund Popper". Inamori Foundation. http://www.inamori-f.or.jp/laureates/k08_c_karl/prf_e.html. Retrieved 9 June 2012.
^ William W. Bartley: Rationality versus the Theory of Rationality, In Mario Bunge: The Critical Approach to Science and Philosophy (The Free Press of Glencoe, 1964), section IX.
^ a b Malachi Haim Hacohen. Karl Popper -- The Formative Years, 1902-1945: Politics and Philosophy in Interwar Vienna. Cambridge: Cambridge University Press, 2001. p. 23, ISBN 0-521-47053-6
^ Magee, Bryan. The Story of Philosophy. New York: DK Publishing, 2001. p. 221, ISBN 0-7894-3511-X
^ Raphael, F. The Great Philosophers London: Phoenix, p. 447, ISBN 0-7538-1136-7
^ Manfred Lube: Karl R. Popper – Die Bibliothek des Philosophen als Spiegel seines Lebens. Imprimatur. Ein Jahrbuch für Bücherfreunde. Neue Folge Band 18 (2003), S. 207–238, ISBN 3-447-04723-2.
^ Stephen Thornton, The Stanford Encyclopedia of Philosophy
^ http://www.univie.ac.at/ubwdb/data/ska/m001/z017/h065/a0166412.gif
^ Sir Karl Popper at Find a Grave
^ Popper, Karl Raimund (1946) Aristotelian Society Supplementary Volume XX.
^ Gregory, Frank Hutson (1996) Arithmetic and Reality: A Development of Popper's Ideas. City University of Hong Kong. Republished in Philosophy of Mathematics Education Journal No. 26 (December 2011).
^ The Open Society and Its Enemies: The Spell of Plato, by Karl Raimund Popper, Princeton University Press, 1971, ISBN 0-691-01968-1, pg 265
^ Popper, K. R. "Of Clouds and Clocks," in his Objective Knowledge, corrected edition, pp. 206-55, Oxford, Oxford University Press (1973), p. 231 footnote 43, & p. 252; also Popper, K. R. ''"Natural Selection and the Emergence of Mind"''1977.
^ Popper, K. R. "Of Clouds and Clocks," in: Objective Knowledge, corrected edition, pp. 227, Oxford, Oxford University Press (1973. Popper's Hume quote is from Treatise on Human Understanding, (see note 8) Book I, Part I, Section XIV, p.171
^ Of Clouds and Clocks, in Objective Knowledge: An Evolutionary Approach, Oxford (1972) p. 227ff.
^ Eccles, John C. and Karl Popper. The Self and Its Brain: An Argument for Interactionism, Routledge (1984)
^ Hacohen, 2000
^ Weimer and Palermo, 1982
^ Unended Quest ch. 37 - see Bibliography
^ a b c "CA211.1: Popper on natural selection's testability". talk.origins. 2005-11-02. http://www.talkorigins.org/indexcc/CA/CA211_1.html. Retrieved 2009-05-26.
^ Karl Popper in Evolutionary epistemology, rationality, and the sociology of knowledge by Radnitzky, Bartley and Popper, pp. 144-145, accessible at [1]
^ Objective Knowledge, section "The Hopeful Behavioral Monster"
^ D. W. Miller: Karl Popper, a scientific memoir. Out of Error, p. 33
^ Bryan Magee 1973: Popper (Modern Masters series)
^ Kuhn, Thomas (1970). The Structure of Scientific Revolutions. Chicago: University of Chicago Press.
^ 'K R Popper (1970)', "Normal Science and its Dangers", pages 51-58 in I Lakatos & A Musgrave (eds.) (1970), at page 51.
^ 'K R Popper (1970)', in I Lakatos & A Musgrave (eds.) (1970), at page 56.
^ Popper, Karl, (1934) Logik der Forschung, Springer. Vienna. Amplified English edition, Popper (1959), ISBN 0-415-27844-9
^ See: "Apel, Karl-Otto," La philosophie de A a Z, by Elizabeth Clement, Chantal Demonque, Laurence Hansen-Love, and Pierre Kahn, Paris, 1994, Hatier, 19-20. See Also: Towards a Transformation of Philosophy (Marquette Studies in Philosophy, No 20), by Karl-Otto Apel, trans., Glyn Adey and David Fisby, Milwaukee, 1998, Marquette University Press.
^ Hacking, Ian (1979). "Imre Lakatos' Philosophy of Science". British Journal for the Philosophy of Science 30 (30): 381–410. DOI:10.1093/bjps/30.4.381.
^ John Kadvany. Imre Lakatos and the Guises of Reason. Durham: Duke University Press, 2001. ISBN 05822326590
^ "Professor Paul Krugman at war with Niall Ferguson over inflation"
^ When "Ludwig met Karl..."
See also (by the same authors as the online review listed above): David Edmonds and John Eidinow (2001) Wittgenstein's Poker: the story of a ten-minute argument between two great philosophers ISBN 0066212448340pp. index, chronology of Wittgenstein's and Popper's lives.
^ Taylor, Charles, "Overcoming Epistemology", in Philosophical Arguments, Harvard University Press, 1995, ISBN 0-674-66477-9
^ Philosophia. Philosophical Quarterly of Israel, William W. Bartley: The Philosophy of Karl Popper, Part I: Biology and Evolutionary Epistemology, Philosophia Vol 6 (1976), pp. 463–494.
(deposit account required)
^ See: "Popper is committing a serious historical error in attributing the organic theory of the state to Plato and accusing him of all the fallacies of post-Hegelian and Marxist historicism--the theory that history is controlled by the inexorable laws governing the behavior of superindividual social entities of which human beings and their free choices are merely subordinate manifestations." Plato's Modern Enemies and the Theory of Natural Law, by John Wild, Chicago, 1964, The University of Chicago Press, 23. See Also: "In spite of the high rating one must accord his initial intention of fairness, his hatred for the enemies of the 'open society,' his zeal to destroy whatever seems to him destructive of the welfare of mankind, has led him into the extensive use of what may be called terminological counterpropaganda ..." and "With a few exceptions in Popper's favor, however, it is noticeable that reviewers possessed of special competence in particular fields--and here Lindsay is again to be included--have objected to Popper's conclusions in those very fields ..." and "Social scientists and social philosophers have deplored his radical denial of historical causation, together with his espousal of Hayek's systematic distrust of larger programs of social reform; historical students of philosophy have protested his violent polemical handling of Plato, Aristotle, and particularly Hegel; ethicists have found contradictions in the ethical theory ('critical dualism') upon which his polemic is largely based." In Defense of Plato, by Ronald B. Levinson, New York, 1970, Russell and Russell, 20.
^ John Gray, Straw Dogs, p.22 Granta Books, London, 2002
^ John Gray, Straw Dogs, Granta Books, London, 2002
^ John Gray, Straw Dogs, p.22, Granta Books, London, 2002
^ Karl Popper, Replies to my Critics, Open Court, London, 1974
^ Karl Popper, Replies to my Critics, p1009 Open Court, London, 1974
The Two Fundamental Problems of the Theory of Knowledge, 1930–33 (as a typescript circulating as Die beiden Grundprobleme der Erkenntnistheorie; as a German book 1979, as English translation 2008), ISBN 0-415-39431-7
The Logic of Scientific Discovery, 1934 (as Logik der Forschung, English translation 1959), ISBN 0-415-27844-9
The Poverty of Historicism, 1936 (private reading at a meeting in Brussels, 1944/45 as a series of journal articles in Econometrica, 1957 a book), ISBN 0-415-06569-0
The Open Society and Its Enemies, 1945 Vol 1 ISBN 0-415-29063-5, Vol 2 ISBN 0-415-29063-5
Quantum Theory and the Schism in Physics, 1956/57 (as privately circulated galley proofs; published as a book 1982), ISBN 0-415-09112-8
The Open Universe: An Argument for Indeterminism, 1956/57 (as privately circulated galley proofs; published as a book 1982), ISBN 0-415-07865-2
Realism and the Aim of Science, 1956/57 (as privately circulated galley proofs; published as a book 1983), ISBN 0-09-151450-9
Conjectures and Refutations: The Growth of Scientific Knowledge, 1963, ISBN 0-415-04318-2
Objective Knowledge: An Evolutionary Approach, 1972, Rev. ed., 1979, ISBN 0-19-875024-2
Unended Quest; An Intellectual Autobiography, 1976, ISBN 0-415-28590-9
The Self and Its Brain: An Argument for Interactionism (with Sir John C. Eccles), 1977, ISBN 0-415-05898-8
In Search of a Better World, 1984, ISBN 0-415-13548-6
Die Zukunft ist offen (The Future is Open) (with Konrad Lorenz), 1985 (in German), ISBN 3-492-00640-X
A World of Propensities, 1990, ISBN 1-85506-000-0
The Lesson of this Century, (Interviewer: Giancarlo Bosetti, English translation: Patrick Camiller), 1992, ISBN 0-415-12958-3
All life is Problem Solving, 1994, ISBN 0-415-24992-9
The Myth of the Framework: In Defence of Science and Rationality, (Edited by Mark Amadeus Notturno) 1994, ISBN 0-415-13555-9
Knowledge and the Mind-Body Problem: In Defence of Interaction, (Edited by Mark Amadeus Notturno) 1994 ISBN 0-415-11504-3
The World of Parmenides, Essays on the Presocratic Enlightenment, 1998, (Edited by Arne F. Petersen with the assistance of Jørgen Mejer), ISBN 0-415-17301-9
After The Open Society, 2008. (Edited by Jeremy Shearmur and Piers Norris Turner, this volume contains a large number of Popper's previously unpublished or uncollected writings on political and social themes.) ISBN 978-0-415-30908-0
Frühe Schriften, 2006 (Edited by Troels Eggers Hansen, includes Popper's writings and publications from before the Logic, including his previously unpublished thesis, dissertation and journal articles published that relate to the Wiener Schulreform) ISBN 978-3-16-147632-7
[Comprehensive bibliography:] Lube, Manfred: Karl R. Popper. Bibliographie 1925–2004. Wissenschaftstheorie, Sozialphilosophie, Logik, Wahrscheinlichkeitstheorie, Naturwissenschaften. Frankfurt/Main etc.: Peter Lang, 2005. 576 pp. (Schriftenreihe der Karl Popper Foundation Klagenfurt.3.)- Current edition
Stefano Gattei. Karl Popper's Philosophy of Science. 2009.
David Miller. Critical Rationalism: A Restatement and Defence. 1994.
David Miller (Ed.). Popper Selections.
John W. N. Watkins. Science and Skepticism. 1984.
Bailey, Richard, Education in the Open Society: Karl Popper and Schooling. Aldershot, UK: Ashgate 2000. The only book-length examination of Popper's relevance to education.
Bartley, William Warren III. Unfathomed Knowledge, Unmeasured Wealth. La Salle, IL: Open Court Press 1990. A look at Popper and his influence by one of his students.
Berkson, William K., and Wettersten, John. Learning from Error: Karl Popper's Psychology of Learning. La Salle, IL: Open Court 1984
Edmonds, D., Eidinow, J. Wittgenstein's Poker. New York: Ecco 2001. A review of the origin of the conflict between Popper and Ludwig Wittgenstein, focused on events leading up to their volatile first encounter at 1946 Cambridge meeting.
Feyerabend, Paul Against Method. London: New Left Books, 1975. A polemical, iconoclastic book by a former colleague of Popper's. Vigorously critical of Popper's rationalist view of science.
Hacohen, M. Karl Popper: The Formative Years, 1902–1945. Cambridge: Cambridge University Press, 2000.
Hickey, J. Thomas. History of the Twentieth-Century Philosophy of Science Book V, Karl Popper And Falsificationist Criticism. www.philsci.com . 1995* Kadvany, John Imre Lakatos and the Guises of Reason. Durham and London: Duke University Press, 2001. ISBN 0-8223-2659-0. Explains how Imre Lakatos developed Popper's philosophy into a historicist and critical theory of scientific method.
Keuth, Herbert. The Philosophy of Karl Popper. Cambridge: Cambridge University Press, 2004. An accurate scholarly overview of Popper's philosophy, ideal for students.
Kuhn, Thomas S. The Structure of Scientific Revolutions. Chicago: University of Chicago Press, 1962. Central to contemporary philosophy of science is the debate between the followers of Kuhn and Popper on the nature of scientific enquiry. This is the book in which Kuhn's views received their classical statement.
Lakatos, I & Musgrave, A (eds.) (1970), Criticism and the Growth of Knowledge, Cambridge (Cambridge University Press). ISBN 0-521-07826-1
Levinson, Paul, ed. In Pursuit of Truth: Essays on the Philosophy of Karl Popper on the Occasion of his 80th Birthday. Atlantic Highlands, NJ: Humanities Press, 1982. A collection of essays on Popper's thought and legacy by a wide range of his followers. Includes an interview with Sir Ernst Gombrich.
Lindh, Allan Goddard (11 November 1993). "Did Popper solve Hume's problem?". Nature 366 (6451): 105–106. DOI:10.1038/366105a0
Magee, Bryan. Popper. London: Fontana, 1977. An elegant introductory text. Very readable, albeit rather uncritical of its subject, by a former Member of Parliament.
Magee, Bryan. Confessions of a Philosopher, Weidenfeld and Nicolson, 1997. Magee's philosophical autobiography, with a chapter on his relations with Popper. More critical of Popper than in the previous reference.
Munz, Peter. Beyond Wittgenstein's Poker: New Light on Popper and Wittgenstein Aldershot, Hampshire, UK: Ashgate, 2004. ISBN 0-7546-4016-7. Written by the only living student of both Wittgenstein and Popper, an eyewitness to the famous "poker" incident described above (Edmunds & Eidinow). Attempts to synthesize and reconcile the differences between these two philosophers.
Niemann, Hans-Joachim. Lexikon des Kritischen Rationalismus, (Encyclopaedia of Critical Raionalism), Tübingen (Mohr Siebeck) 2004, ISBN 3-16-148395-2. More than a thousand headwords about critical rationalism, the most important arguments of K.R. Popper and H. Albert, quotations of the original wording. Edition for students in 2006, ISBN 3-16-149158-0.
Notturno, Mark Amadeus. "Objectivity, Rationality, and the Third Realm: Justification and the Grounds of Psychologism". Boston: Martinus Nijhoff, 1985.
Notturno, Mark Amadeus. On Popper. Wadsworth Philosophers Series. 2003. A very comprehensive book on Popper's philosophy by an accomplished Popperian.
Notturno, Mark Amadeus. "Science and the Open Society". New York: CEU Press, 2000.
O'Hear, Anthony. Karl Popper. London: Routledge, 1980. A critical account of Popper's thought, viewed from the perspective of contemporary analytic philosophy.
Radnitzky, Gerard, Bartley, W. W., III eds. Evolutionary Epistemology, Rationality, and the Sociology of Knowledge. La Salle, IL: Open Court Press 1987. ISBN 0-8126-9039-7. A strong collection of essays by Popper, Campbell, Munz, Flew, et al., on Popper's epistemology and critical rationalism. Includes a particularly vigorous answer to Rorty's criticisms.
Richmond, Sheldon. Aesthetic Criteria: Gombrich and the Philosophies of Science of Popper and Polanyi. Rodopi, Amsterdam/Atlanta, 1994, 152 pp. ISBN 90-5183-618-X.
Rowbottom, Darrell P. Popper's Critical Rationalism: A Philosophical Investigation. London: Routledge, 2010. A research monograph on Popper's philosophy of science and epistemology. It critiques and develops critical rationalism in light of more recent advances in mainstream philosophy.
Schilpp, Paul A., ed. The Philosophy of Karl Popper, 2 vols. La Salle, IL: Open Court Press, 1974. One of the better contributions to the Library of Living Philosophers series. Contains Popper's intellectual autobiography, a comprehensive range of critical essays, and Popper's responses to them. ISBN 0-87548-141-8 (vol.I). ISBN 0-87548-142-6 (Vol II)
Schroeder-Heister, P. "Popper, Karl Raimund (1902–94)," International Encyclopedia of the Social & Behavioral Sciences, 2001, pp. 11727–11733.Abstract.
Shearmur, Jeremy. The Political Thought of Karl Popper. London and New York: Routledge, 1996. Study of Popper's political thought by a former assistant of Popper's. Makes use of archive sources and studies the development of Popper's political thought and its inter-connections with his epistemology.
Stokes, G. Popper: Philosophy, Politics and Scientific Method. Cambridge: Polity Press, 1998. A very comprehensive, balanced study, which focuses largely on the social and political side of Popper's thought.
Stove, D.C., Popper and After: Four Modern Irrationalists. Oxford: Pergamon. 1982. A vigorous attack, especially on Popper's restricting himself to deductive logic.
Thornton, Stephen. "Karl Popper," Stanford Encyclopedia of Philosophy, 2006.
Weimer, W., Palermo, D., eds. Cognition and the Symbolic Processes. Hillsdale, NJ: Lawrence Erlbaum Associates. 1982. See Hayek's essay, "The Sensory Order after 25 Years", and "Discussion".
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Popper on In Our Time at the BBC. (listen now), 8 February 2007. Discussion with John Worrall, Professor of Philosophy of Science at the London School of Economics, Anthony O'Hear, Weston Professor of Philosophy at Buckingham University, Nancy Cartwright, Professor of Philosophy at the LSE and the University of California, hosted by Melvyn Bragg.
History of Twentieth-Century Philosophy of Science, BOOK V: Karl Popper Site offers free downloads by chapter available for public use.
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Austrian Karl R. Popper Research Association, University of Graz, Austria
Sound recordings from the Sir Karl R. Popper papers at the Hoover Institution Archives.
Bhattacharya
Dharmakirti
Biological naturalism
Emergent materialism
Epiphenomenalism
Identity theory
Interactionism
Naïve realism
Phenomenalism
Phenomenology (Existential phenomenology)
Property dualism
Representational theory of mind
Substance dualism
Abstract object
Chinese room
Concept and object
Mental event
Mental image
Mental process
Mental property
Mental representation
Mind-body dichotomy
Problem of other minds
Propositional attitude
Philosophy of artificial intelligence
Philosophy of information
Philosophy of perception
Philosophy of self
Berlin Circle
Carl Gustav Hempel
C. D. Broad
Dominicus Gundissalinus
Epicurians
Friedrich Schelling
Henri Poincaré
Hugh of Saint Victor
Imre Lakatos
Karl Pearson
Karl Theodor Jaspers
Larry Laudan
Otto Neurath
Paul Häberlin
Paul Feyerabend
Pierre Duhem
Pierre Gassendi
R.B. Braithwaite
Robert Kilwardby
Roger Bacon
Stephen Toulmin
Thomas Samuel Kuhn
Vienna Circle
W.V.O. Quine
Wilhelm Windelband
Wilhelm Wundt
William of Ockham
Analytic-synthetic distinction
A priori and a posteriori
Commensurability
Demarcation problem
Explanatory power
Ignoramus et ignorabimus
Models of scientific inquiry
Scientific explanation
Scientific law
Theory choice
Metatheory of science
Coherentism
Contextualism
Conventionalism
Deductive-nomological model
Fallibilism
Foundationalism
Hypothetico-deductive model
Infinitism
Instrumentalism
Received view of theories
Semantic view of theories
Scientific anti-realism
Uniformitarianism
Vitalism
Philosophy of chemistry
Philosophy of space and time
Philosophy of thermal and statistical physics
Philosophy of environment
Philosophy of technology
Philosophy of computer science
Rhetoric of science
Sociology of scientific knowledge
Criticism of science
Vaisheshika
Nyāya Sūtras
Marsilius
Bosanquet
Bentham
Gentile
Maritain
Debord
Đilas
Oakeshott
Alinsky
Baudrillard
Badiou
Social theories
National liberalism
Conflict theory
Consensus theory
Philosophy of sex
Name Popper, Karl Raimund
Short description Austrian-British philosopher of science
Date of birth (1902-07-28)28 July 1902
Place of birth Vienna
Date of death 17 September 1994(1994-09-17)
Place of death London
Retrieved from "http://en.wikipedia.org/w/index.php?title=Karl_Popper&oldid=498141582"
20th-century philosophers
Analytic philosophers
Austrian agnostics
Austrian philosophers
British agnostics
British people of Austrian descent
Austrian people of Jewish descent
British philosophers
British political philosophers
Cambridge University Moral Sciences Club
Philosophers of mind
Consciousness researchers and theorists
Philosophers of science
Mont Pelerin Society members
Members of the Order of the Companions of Honour
Knights Bachelor
Fellows of the British Academy
Fellows of Darwin College, Cambridge
Recipients of the Pour le Mérite (civil class)
Academics of the London School of Economics
University of Vienna alumni
University of Canterbury faculty
Refugees ennobled in the United Kingdom
People from Vienna
Naturalised citizens of the United Kingdom
Grand Crosses with Star and Sash of the Order of Merit of the Federal Republic of Germany
Social liberals
Kyoto laureates in Arts and Philosophy
Toutes les traductions de Karl Popper


Greek Salad - a blog from Greece!: Sarah Jessica Parker in Greece!
Sarah Jessica Parker in Greece!
The popular Sarah Jessica Parker, her husband Matthew Broderick and their 3 children are spending their holidays in the Greek archipelago on their yacht. Sarah has been seen buying fruits, vegetables and more at Corfu, the island I wrote about yesterday!
Matthew Broderick has been acting in loads of movies as well.
Two year old picture of this beautiful family! Their son is 8 years old now and the twin-girls, borned by a surrogate mother, have just had their 2nd birthday.


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https://www.newmilfordspectrum.com/news/article/Seeking-9th-Wimbledon-title-Federer-faces-14093184.php
Howard Fendrich, Ap Tennis Writer
Switzerland's Roger Federer celebrates after beating Spain's Rafael Nadal in a Men's singles semifinal match on day eleven of the Wimbledon Tennis Championships in London, Friday, July 12, 2019. (Adrian Dennis/Pool Photo via AP) less
Switzerland's Roger Federer celebrates after beating Spain's Rafael Nadal in a Men's singles semifinal match on day eleven of the Wimbledon Tennis Championships in London, Friday, July 12, 2019. (Adrian ... more
Photo: Adrian Dennis, AP
WIMBLEDON, England (AP) — If Roger Federer's going to win a record ninth championship at Wimbledon, he'll need to follow up a victory over Rafael Nadal with one over defending champion Novak Djokovic.
As is the case with Nadal, Federer has faced Djokovic so many times over the years that each knows the other's game so well. And as is the case with Nadal, Djokovic has managed to get the better of Federer head-to-head so far.
"It's the same like going into a Rafa match: I think the moment you've played somebody, probably, more than 15 times — especially in recent years, also, a few times — there's not that much more left out there. Especially, you know where the players go when it really matters," the No. 2-seeded Federer said, looking ahead to Sunday's final, his 12th at the All England Club.
"How much can you still surprise somebody?"
It's also the 16th showdown between Federer and Djokovic at a Grand Slam tournament, breaking a tie with Djokovic vs. Nadal for the most by a pair of men in the Open era, which began in 1968.
"At the end of the day, it comes very much down to who's better on the day, who's in a better mental place, who's got more energy left," Federer said, "who's tougher when it really comes to the crunch."
He is 8-1 in past finals at the grass-court tournament he's ruled the way no other man has. Two of those defeats were in 2014 and 2015 against Djokovic; the other came in 2008 against Nadal.
Federer and Nadal hadn't played since then at Wimbledon until their semifinal Friday.
"He is always able to do the most difficult things easy," Nadal said about his longtime rival. "He's able to move inside the court quicker than (anyone). He puts pressure on the opponent all the time, because he has the ability to take the ball earlier than (anyone) else. That's probably the most difficult thing to make happen, and he is able to do it so well."
Still, it'll take that and more to get past the No. 1-seeded Djokovic, who is up to his usual body-bending, grind-it-out excellence at the baseline, even winning a 45-stroke point while eliminating Roberto Bautista Agut 6-2, 4-6, 6-3, 6-2 in the semifinals.
"Of course, I'm going to be excited and nervous and everything that you can think of," he said. "I'm going to do my best to control that in some way and be able to portray my best tennis."
Perhaps Federer, who turns 38 on Aug. 8, will extend his lead on the career list to a men's-record 21 championships, which would leave him three ahead of Nadal, who is 33 years old, and six ahead of Djokovic, who is 32.
"I am looking to make history in this sport," Djokovic said. "Of course, I would love to have a shot at as many Grand Slam titles as possible. Those are probably the top goals and ambitions."

redpajama_set_name: RedPajamaCommonCrawl


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FINALLY: Nike Is Going To Sell Those Self-Lacing 'Back To The Future 2' Sneakers This Year
Lara O'Reilly
They're coming.
YouTube/Nice Kicks
Nike has confirmed it is releasing Marty McFly's self-lacing, light-up sneakers from "Back to the Future" to the public in 2015, Nice Kicks reports.
Speaking at the #AgendaEmerge conference in Long Beach, California, this week, Tinker Hatfield, who designed the Nike MAG sneaker Marty McFly wore in the 1989 film "Back to the Future 2," said his team is working as hard as possible to release a line of the "power lace" shoes this year. No details yet on pricing, but given that they actually lace up by themselves, they are unlikely to be cheap.
The release date is a poignant one: 2015 is the year to which Marty McFly and Doc Brown are sent in the film.
Here is what Marty McFly's Nike sneakers looked like in the movie 26 years ago.
And here is how they will look in reality.
Nice Kicks has some more on how the power laces will actually work, based on Nike's US patent filing.
The mechanism is housed in the midsole of the shoe and is activated using a button on the outside, which sets off a kind of cog and pulley system:
It's not the first time Nike has attempted to bring the "Back to the Future" shoes into the 21st century. Back in 2011, Nike auctioned off 150 pairs of the self-fastening, glowing sneakers to raise money for the Michael J. Fox Foundation for Parkinson's Research. Winning bids reached more than $5,000.
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Nike Air Mag Nike Back To The Future


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Dakota DC-3 aircraft arrives at Jamnagar air base
New Delhi/Jamnagar, Apr 25 (UNI) A fully refurbished World War-II era Dakota DC-3 aircraft on Wednesday arrived at Jamnagar air base in Gujarat.
The vintage military transport aircraft, which played a crucial role in the 1947 Indo-Pak War, commenced its ferry from Coventry (UK) on April 17 and reached Jamnagar Air Force Station on April 25 at its port of entry.
The aircraft is planned to ferry from Jamnagar to Air Force Station Hindon on April 26 for induction into the Vintage Aircraft Flight of the IAF formed in the year 2012, Abhishek Matiman, Gujarat Defence PRO said.
The flight was formed with the initial induction of Tiger Moth aircraft and subsequently the Harward aircraft in 2015.
The Douglas DC3 aircraft, better known as Dakota, were introduced in the year 1930 as part of the 12 Squadron of the Royal Indian Air Force.
During the first Indo-Pak war, besides carrying supplies and refugees, they carried the troops of Indian Army's 1st Sikh Regiment to Srinagar on October 27, 1947 to intervene in time to save the valley of Kashmir and Poonch from Pakistan.
Dakotas flew their last missions in the eighties and finally retired from the IAF in the year 1987.
The aircraft has been gifted to the Indian Air Force by Rajya Sabha Parliamentarian Rajeev Chandrasekhar whose father Air Commodore MK Chandrasekhar was a veteran Dakota pilot in the IAF.
UNI ASH SHK 2015


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FBI notified of arson investigation after ballot drop box set on fire in Baldwin Park
By Mary Stringini
Ballot drop box set ablaze in Baldwin Park
BALDWIN PARK, Calif. - The Los Angeles County Registrar's office will be picking up ballots placed in drop boxes daily after a ballot box was set on fire in Baldwin Park, prompting an arson investigation.
"This attack on a county ballot drop box was reprehensible,'' Los Angeles County Supervisor Janice Hahn said about the Sunday night fire. "Burning ballots is not just vandalism, it is an attack on our democracy and on our residents' right to vote. Whoever did this must be found and prosecuted to the fullest extent of the law."
Crews responded to the 4100 block of Baldwin Park Boulevard, outside the Baldwin Park Library, around 8:30 p.m. and quickly put out the fire.
Inside the box were some 200 ballots, according to the Mayor of Baldwin Park Manuel Lozano.
"What we do know is that there were 230 pieces," Registrar-Recorder/County Clerk Dean Logan told reporters.
County officials last picked up ballots from the drop box location on Saturday, Oct. 17 at 10:10 a.m., according to the county's registrar's office.
RELATED: Voter Guide 2020: Everything you need to know about voting in Southern California
Arson investigators were on the scene and turned their evidence over to the Baldwin Park Police Department.
No arrests have been made and no suspect has been identified.
Tampering with a ballot drop box could get a perpetrator up to three years in jail and more depending on the number of charges filed.
Ballot drop box set on fire in Baldwin Park
Authorities are investigating after a ballot box was lit on fire in Baldwin Park on Sunday night.
The registrar's office immediately requested an investigation through local law enforcement and has reported the incident both to the FBI and the Attorney General for investigation and to obtain all available footage to determine the cause of the fire.
The registrar's office is reviewing all material collected and will notify voters whose ballots may have been impacted. Additionally, the damaged drop box location has been closed, officials said.
Los Angeles County Supervisor Hilda L. Solis said this arson case "calls into question the security of our elections" and "has all the signs of an attempt to disenfranchise voters."
"Tampering, or attempts to tamper, with our democracy will not be tolerated. Rest assured, LA County residents' voices will be heard when they vote, including in this election," Solis added.
Voters can call the county registrar-recorder/county clerk if they submitted their ballot at the Baldwin Park Library Dropbox to verify their ballot was received and take any remedial measures.
The registrar's office encourages those who utilized this drop box location after Oct. 17 to call 562-503-2445 or vbmdropoff@rrcc.lacounty.gov for assistance.
FOX 11's Hal Eisner contributed to this report.
Law enforcement personnel losing jobs due to vaccine mandate


By Manasa Reddigari on October 9, 2017 in Small Business Tips.
You don't need a big-company budget to offer employee perks that will keep your staff happy, healthy and motivated.
Read on for a selection of enticing employee perks you can offer on a small business budget.
Letting employees work from home one or more days a week can boost their morale by signaling that you trust in their work ethic. The employee perk can also increase their productivity if there are fewer distractions at home. Today, numerous job functions are remote-friendly, from accounting to web development.
If jobs at your business can't be performed remotely, consider offering commuter benefits as one of your employee perks. Some ideas might include discounted access to local public transportation or gas cards for employees who drive.
If your employees deliver work on deadline and need not be in the office or online at certain times, it makes sense to offer them flexible schedules. This employee perk allows employees to escape the 9 to 5 grind and work when they feel most productive.
Studies show that pet-friendly work environments reduce employee stress. Allowing employees to bring their four-legged friends to work creates a fun and familial work atmosphere. It also affords convenience for pet owners who need to keep an eye on their pets during the day.
Employees feel most motivated to work at a business over the long-run when it commits to investing in their future. Hosting live or web seminars, sending employees to local conferences or inviting industry professionals to deliver talks gives employees the knowledge they need to improve their craft.
Most small businesses can't afford to host grand offsite event in Hawaii for their employees. But they can still commit to fostering team spirit and encouraging downtime by hosting budget-friendly off-site events. These employee perks can include trips to local fairs, movies, museums or casual Friday lunches.
Well-funded start-ups are known for their enviable kitchen stock. If you have a tighter budget, consider fueling your employee base by keeping the break room or cafe stocked with essentials like coffee, tea, juice and healthy snacks.
Small businesses that can't afford large-scale employee discount programs can still gift their employees with their own products or services. If you can't provide them for free, provide them at a discount. Employees will gain access to a useful product or service while improving their engagement with your company offering.
Temporarily closing your business during the last week of the year gives employees time to rest and rejuvenate during the holidays without feeling guilty about taking vacation. Are the holidays a busy time for your business? Implement the shutdown during an off-peak time of year.
If you decide to throw a holiday party, don't forget those may potentially be deductible.
You may not be able to replicate the luxurious employee lounge in the Google headquarters on a small business budget. But you can still create a cozy rest area for employees to relax or mingle with co-workers. Establishing a dedicated lounge or break room is a simple way to make employees feel at home at work.


As reported by Florida Today, the recent $6.4 million wrongful death settlement over the death of Freddie Gray has the nation engaging in a conversation about differential treatment from police at traffic stops. Perhaps this comes as no surprise: a poll conducted and released by the National Bar Association reveals that distinct differences exist between the way blacks and whites view treatment by the police.
Although the specifics depend upon the region, roughly 74-90 percent of blacks feel that black people are treated unfairly by the police, compared with 55-63 percent of whites. However, more whites believe that police are misunderstood by black people across the board. Regardless, the survey indicates that there is more work to be done.
These issues are no stranger to Florida: late last year, a routine traffic stop turned deadly when a victim was pulled over in Key West, supposedly due to illegally changing lanes. According to police, he fled, left his vehicle, and then collapsed, going into a coma until eventually being taken off life support. However, according to footage obtained, he was actually surrounded by police after surrendering (and then the video suddenly ends). His family believes that he was actually asphyxiated by police, even though his death was supposedly ruled an accident.
According to the Florida Department of Law Enforcement's investigation, all that the police did was handcuff the victim. It was his pre-existing heart condition that caused oxygen to be cut off to his brain, leading to a coma.
However, his family strongly believes that the incident involved wrongful death, and they have filed suit accordingly. New video footage obtained contradicts police reports, showing the victim being beaten on the ground and bleeding from his head in spite of what police officers reported under sworn testimony. There is also some evidence that those who conducted the investigation did not try to contact the person who took a video that could have shown exactly what happened and that this very video is now missing, and that tasers were also supposedly activated during the arrest.
The Key West police department decided to discipline two of the officers involved, giving one a five-day suspension without pay for making inappropriate comments about the victim and the other a letter of reprimand for unauthorized vehicle pursuit. However, this does not address the issue of routine traffic stops turning into wrongful death–an issue that perhaps only litigation can address moving forward.
Wrongful death cases can be difficult. Not only are the emotions of the grieving family still raw, but showing that a deceased individual suffered physical pain or mental trauma prior to passing away can require the testimony of expert witnesses and a lot of difficult testimony. Attorney Mike Walker is experienced in handling wrongful death cases. Mike Walker understands the emotional pain and suffering, along with the physical realities, that accompany losing a loved one unexpectedly, and is committed to helping you understand what compensation may be available to you and helping you understand the court process. Attorney Walker will vigorously fight for the damages you deserve. Contact the office in Clearwater today for a free consultation.


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In the dog days of summer 2017, we launched an exhibit celebrating the best time of the year to be in the City. From swimming in the local swimming hole to Old Home Week, we love our summertime traditions. Take a stroll back in time to see how citizens spent their summers in the City in our exhibit Picturing A City: Summertime.


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San Francisco fire burns down apartment building
Alex Yang, Staff Writer
A five-alarm fire burnt down an apartment building construction site on Tuesday, sending up black smoke that could be seen for miles around the San Francisco Bay.
The fire began around 5 p.m. Tuesday in San Francisco's Mission Bay neighborhood and caused an evacuation of nearby buildings. The fire also affected a nearby University of California at San Francisco (UCSF) research building, where an ember was quickly put out after spreading onto the roof.
Firefighters work to extinguish the fire in the apartment building.
The scorched building is part of an emerging Mission Bay neighborhood, just south of AT&T Park, where several developments are in the works as part of city revitalization efforts.
Sophomore Thomas Chin said, "I think the firefighters did a good job of keeping the fire on one building. Even when the fire went onto the research building, the firefighters reacted quickly and put it out."
Several dozen residents were evacuated from the Strata apartment building across Fourth Street from the construction site, and about 25 were gathered late Tuesday at an American Red Cross evacuation center at Pier 54.
Hundreds of residents of homes in nearby buildings remained evacuated because the fire's intense heat blew out windows, set off sprinkler systems, and caused other damage.
San Francisco Mayor Ed Lee said, "I think we're lucky that the fire didn't jump anymore."
The burning building was part of a residential development project with 172 units, according to BRE Properties, the building's owner. Fire-suppression systems had not yet been installed in the building, making it harder to extinguish the fire, fire officials said.
"The open construction of the building allowed for rapid fire spread," said Fire Captain Matthew McNaughton.
The fire was one of the biggest fires in San Francisco in years. The main cause of the inferno was said to be from welding work during the construction.
On Wednesday, demolition crews arrived to begin tearing down the burned building. About 30 firefighters remained on scene, dousing the building with water to make sure the fire was completely out.
Sophomore Brent Jang said, "The workers definitely need to be more careful. The fire could have spread to other resident buildings and injured more people, but the firefighters did a good job so that wouldn't happen."
I am a Sophomore graduating in 2016. I mainly cover sports and local news for Scotscoop and I am a writer for the Carlmont Highlander. Lastly, I enjoy playing soccer and tennis in my free time.
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Royal Mail is ratcheting up its campaign to convince more brand owners of the joys of direct mail with the launch of a scheme which offers clients the chance to test different mailing executions with discounts of up to 30%.
The Testing & Innovation Scheme is one of the first fruits of the renewed relationship between the Strategic Mailing Partnership and Royal Mail, with the SMP providing direct input from its board and members.
The industry body was first set up in 2008 to build closer ties between mailing houses and Royal Mail and promote direct mail to the client community but relaunched late last year under the positioning The Strategic Mailing Partnership – The Mailmakers.
The Testing & Innovation Scheme covers both advertising mail and business mail and is being launched by Royal Mail today (February 1). It is designed to help Royal Mail's so-called "access" customers use mail for business purposes in a way that they have not used mail before, to help them deliver even greater results.
Both will be incentivised through a series of discounts in the form of postage credits, regardless of whether the postings are made through Royal Mail, an access operator or another postal delivery provider.
Incentives include up to 30% off the access price (6.5p-23p) for business mail tests over a 6-month period and up 15% off the access price (2.5p-10.5p) for advertising mail tests, also over a 6-month period.
Royal Mail Wholesale commercial director Jenny Ledgar praised the SMP's support, describing it as "invaluable to the development of the testing schemes".