The Department of Philosophy is sad to announce that professor emeritus David H. Sanford has passed away. A Duke faculty member since 1970, Sanford earned his Ph.D. from Cornell in 1966 and previously taught at Dartmouth College. He was widely known in the field for his work on causation and inference in "If P, Then Q: Conditionals and the Foundations of Reasoning," first published in 1989. He also wrote on induction, the logic of vagueness, among other things.