The Ksanabhangasiddhi is a masterpiece of skillful reasoning by the eleventh-century Indian Buddhist philosopher Ratnakirti. This renowned scholar taught at the great Buddhist University of Vikramasila and was a master of almost every classical philosophical school that preceded him. The present work is informed by centuries of debate between Buddhist advocates of momentariness and archrival Nyaya philosophers who believed that both selves and things endure. This book is the first published translation of Ratnakirti's proof based on positive correlations, and includes a commentary explaining each step of his reasoning. Published by American Institute of Buddhist Studies (AIBS)