Kuhn himself, however, showed only limited sympathy for such developments. In his “The Trouble with the Historical Philosophy of Science” (1992) Kuhn derides those who take the view that in the ‘negotiations’ that determine the accepted outcome of an experiment or its theoretical significance, all that counts are the interests and power relations among the participants. Kuhn targeted the proponents of the Strong Programme in the Sociology of Scientific Knowledge with such comments; and even if this is not entirely fair to the Strong Programme, it reflects Kuhn’s own view that the primary determinants of the outcome of a scientific episode are to be found within science. External history of science seeks causes of scientific change in social, political, religious and other developments of science. Kuhn sees his work as “pretty straight internalist” (2000: 287).  First, the five values Kuhn ascribes to all science are in his view constitutive of science.  An enterprise could have different values but it would not be science (1977c, 331; 1993, 338).  Secondly, when a scientist is influenced by individual or other factors in applying these values or in coming to a judgment when these values are not decisive, those influencing factors will typically themselves come from within science (especially in modern, professionalized science). Personality may play a role in the acceptance of a theory, because, for example, one scientist is more risk-averse than another (1977c, 325)—but that is still a relationship to the scientific evidence. Even when reputation plays a part, it is typically scientific reputation that encourages the community to back the opinion of an eminent scientist.  Thirdly, in a large community such variable factors will tend to cancel out. Kuhn supposes that individual differences are normally distributed and that a judgment corresponding to the mean of the distribution will also correspond to the judgment that would, hypothetically, be demanded by the rules of scientific method, as traditionally conceived (1977c, 333).  Moreover, the existence of differences of response within the leeway provided by shared values is crucial to science, since it permits “rational men to disagree” (1977c, 332) and thus to commit themselves to rival theories.  Thus the looseness of values and the differences they permit “may . . . appear an indispensable means of spreading the risk which the introduction or support of novelty always entails” (Ibid.).