Buddhist philosophers have long sought to work out the mysteries of the universe through a technical system of logic. The unrivaled master of this system was the 6th century logician Dharmakirti, one of India's most influential thinkers. Collected here are twelve articles by Prof. Tom Tillemans, a scholar of Buddhist logic whose work has greatly enhanced our knowledge of this complex system. These articles analyze such topics as deviant logic, subject failure in the Indo-Tibetan Buddhist logical tradition, and the logical and rational limits for the authority of Buddhist scripture.