So called “scientific facts” and “natural kinds”, the primary subjects of scientific investigation are, at least in part, the products of the contingent social and epistemic norms that define the very subject matter of science. It may be argued that the view, if taken literally, entails a counter-intuitive form of backward causation to the effect that, for instance, the scientific facts about dinosaur anatomy 50 million years ago were caused in the 20th century when a scientific consensus about dinosaur anatomy was formed (see Boghossian 2006a). But constructionism, at least in its most extreme form, accepts this consequence, insisting that there are indeed no facts except for socially constructed ones, created and modified at particular times and places courtesy of prevailing theoretical and conceptual frameworks.