Barry Stroud is Willis S. and Marion Slusser Professor of Philosophy in the University of California, Berkeley. He is a member of the American Academy of Arts and Sciences, a Corresponding Fellow of the British Academy, and the author of Hume (1977), The Significance of Philosophical Scepticism (OUP, 1984), The Quest for Reality (OUP, 2000), and two collections of essays, Understanding Human Knowledge (OUP, 2000) and Meaning, Understanding, and Practice (OUP, 2000).