John Perry is Distinguished Professor of Philosophy at the University of California at Riverside, and Henry Waldgrave Stuart Professor of Philosophy Emeritus at Stanford University. He is a member of the American Academy of Arts and Sciences and a recipient of many honors and awards, including the Nicod and Humboldt Prizes. A popular lecturer, in 1990 he was awarded the Dinkelspiel Award for undergraduate teaching. He is the author of over 100 articles and books, including A Dialogue on Personal Identity and Immortality, Knowledge, Possibility, and Consciousness, and Reference and Reflexivity. He also has the internet’s most popular essay on procrastination.