The Sva^trantika school， which was a branch of Indian Ma^dhyamika 中观派 which developed out of the writings of the the Middle Way scholar Bha^vaviveka 清辩（ca. 490-570）. Bha^vaviveka was known for his use of ositive dialectic to support the theory of emptiness. In this he was distinguished from philosophical opponents such as Buddhapa^lita 佛护 and Candraki^rti 月称， both of whom denied the validity of the use of logical propositions which ended up affirming any sort of positive position. Their theories would result in the development of an opposing school called Pra^san!gika （Guimiulunzhengpai 归谬论证派）。