From Tarka to Anumana: A Rational Journey of Knowledge

Abstract

Anumana (inference) is recognized as one of the principal Pramanas (means of valid knowledge) in Ayurveda epistemology. Tarka (logical reasoning), integral to the Nyaya philosophical system, serves as a critical cognitive and argumentative tool that supports the validity of Anumana by establishing and maintaining Vyapti (invariable concomitance). Aim: This review aims to enable postgraduate scholars to: (1) elucidate the definition and typology of Tarka as presented in Nyaya Sutra and Tarkasamgraha; (2) clearly distinguish between Tarka as Apramana and as an auxiliary instrument in Anumana; (3) explain and support the essential role of Tarka in the process of Anumana; and (4) identify and illustrate the practical applications of Anumana Pariksha in Sarira, Nidana, Chikitsa, and research methodology, with reference to modern scientific approaches. Materials and Methods: This classical review article is based on a systematic examination of primary Ayurveda Samhitas, including Charaka Samhita, Sushruta Samhita, and Ashtanga Hrdaya, as well as Indian philosophical texts such as the Nyaya Sutra of Gautama and Tarkasamgraha of Annambhatta. Contemporary peer-reviewed literature was sourced from PubMed, Google Scholar, AYUSH Research Portal, and the DHARA digital repository. Relevant Sanskrit slokas are provided with transliteration and interpretation. Discussion: Tarka functions as an Apramana, a non-independent means of knowledge, whose primary role is to eliminate contradictory alternatives and confirm Vyapti, the logical foundation of inferential reasoning. The five types - Pramanabadhita, Atmasraya, Anyonyasraya, Cakrakasraya, and Anavastha - serve to identify and exclude flawed logical structures. Conclusion: The systematic application of Anumana Pariksha in both clinical and research contexts highlight the fundamentally rationalist structure of Ayurveda.