Timothy Williamson, in various places, has put forward an argument that is supposed to show that denying bivalence is absurd. This paper is an examination of the logical force of this argument, which is found wanting.

In Purity and Danger Mary Douglas identifies the concern for purity as a key theme at the heart of every society. In lively and lucid prose she explains its relevance for every reader by revealing its wide-ranging impact on our attitudes to society, values, cosmology and knowledge. The book has been hugely influential in many areas of debate - from religion to social theory. But perhaps its most important role is to offer each reader a new explanation of why people (...) behave in the way they do. With a specially commissioned introduction by the author which assesses the continuing significance of the work thirty-five years on, this Routledge Classics edition will ensure that Purity and Danger continues to challenge and question well into the new millennium. (shrink)