A.B., Dartmouth College; Ph.D., Princeton University. Has taught at Swarthmore College, Cornell University, The Johns Hopkins University, and The University of Michigan. Since 1987, the William Herbert Perry Faunce Professor of Philosophy at Brown University. President of the American Philosophical Association, the Central Division, 1988-89. Fellow of the American Academy of Arts and Sciences, 1991-. Co-editor of the philosophical quarterly Noûs, 2000-05.