This book is a study on Gangesa's Pramanavada and contains a free English translation of the Sanskrit text. This study clarifies the concept of truth in Indian philosophy, especially in the Mimamsa and the Nyaya systems and attempts a critical appraisal of the pramanya theories. Not much attention has been paid by scholars to a precise explication of the concept of truth in Indian philosophy. This work throws light on this and clarifies the concepts, and clarifies the amazingly complicated simple question: Is pramanya svatah or paratah? This is one of those questions to which every school worth the name came forward with an official answer. Arguments and counter-arguments were produced in a never-ending stream. This work clarifies the nature of the issue around which the theories centre, and then examines the nature of the arguments that have been advanced by the different schools in support of their contentions Gangesa's great contribution; to the problem has been brought to the foreground.