My research concerns what we should believe—in science, philosophy, and everyday life—and how probability can be used to model rational belief.  Specific topics include skepticism, the ethics of belief, imprecise probability and decision theory, the ravens paradox, and philosophical methodology.  My teaching interests are broad, including logic, happiness and Asian philosophy.

I received a BA from Stanford and a PhD from MIT.
Currently I am the John L. Loeb Associate Professor of the Humanities at Harvard.