The Nyaya Theory of Knowledge is the first systematic, critical and comparative treatment of the Ny??ya epistemology. It reveals how, as a thorough-going realistic view of the universe, the Ny??ya philosophy supplies an important Eastern parallel to the triumphant modern Realism of the West, and contains anticipations of as well as possible alternatives to many contemporary realistic theories. This book is important as much for the correct understanding of ancient Indian philosophy, as for the evaluation of modern Western philosophy.