John Perry, Henry Waldgrave Stuart Professor of Philosophy at Stanford University, is one of a handful of contemporary analytic philosophers to combine the focused approach of most current work in analytic philosophy with the more expansive systems-building of earlier analytic philosophers and contemporary philosophers in other disciplines. Perry, like W. V. O. Quine, Donald Davison, David Lewis, and Hilary Putnam, focuses on narrow topics across a broad range of subjects. In this volume, leading contemporary analytic philosophers contribute original essays in each of the areas that have been most influenced by Perry's work-metaphysics, language, and mind. Perry himself contributes detailed and original replies.