MOVING TO FRONT FROM JULY 15, SEE UPDATE.

Professor of Philosophy at Carnegie-Mellon University, he was well-known for his work in formal epistemology, philosophical logic, and decision theory.  There is a brief notice at the Choice & Inference blog, which invites remembrances from friends and colleagues.  I will post links to memorial notices as they appear. 

UPDATE:   CMU's memorial notice, including funeral information.

ANOTHER:  If you scroll towards the end of the comments here you will find some really splendid and moving poems (by Hesse and Borges) that his friends read at his funeral.