This document discusses Pramana in Ayurveda, which refers to valid or true knowledge that is obtained through scientific tools and methods of examination known as Pramana Vijñana. Pramana refers to the instruments used to obtain valid knowledge, such as direct perception or inference. Prama refers to the valid knowledge obtained, PramatA is the knower, and Prameya is the topic of knowledge. Ayurveda emphasizes obtaining knowledge through rigorous examination and testing to arrive at true scientific understanding. Pramana Vijñana involves tools like observation, inference and testimony to verify concepts and arrive at valid knowledge.