Buddhist Logic and Epistemology About the Author Bimal Krishna Matilal (1935-1991) was an eminent Indian philosopher. The upadhi (degree) of Tarkatirtha (master of Logic) was awarded to him in 1962. Matilal secured a Fulbright Fellowship and completed his PhD under Ingalls on the Navya Nyaya doctrine of negation, between 1962 and 1965. During this period he also studied with W.V.O. Quine. Subsequently, he was professor of Sanskrit at the University of Toronto, and in 1977 he was elected as Spalding Professor at Oxford University, succeeding Sarvepalli Radhakrishnan and R.C. Zaehner.