Willard Van Orman Quine (1908?2000) held the Edgar Pierce Chair of Philosophy at Harvard University from 1956 to 2000. Considered one the most influential philosophers of the twentieth century, he is the author of Mathematical Logic, The Roots of Reference, The Time of My Life: An Autobiography (MIT Press), and many other books.
Patricia S. Churchland is President's Professor of Philosophy Emerita at the University of California, San Diego, and Adjunct Professor at the Salk Institute for Biological Sciences. She is the author of many books, including Neurophilosophy and Brain-Wise (both published by the MIT Press).
Dagfinn Føllesdal is C. I. Lewis Professor of Philosophy, Emeritus, at Stanford University.