Richard Marshall interviews Wykeham Professor of Logic at Oxford Timothy Williamson. 3:AM: Your last two books, Knowledge and Its Limits and The Philosophy of Philosophy are astonishingly radical. Your 1994 book on Vagueness has already become a classic of analytic philosophy. Yet outside of professional philosophy circles they have not become well known. Jerry Fodor once noted that whereas Sartre, Foucault and Derrida could easily be found in bookstores his own books, and those of