The meaning of the term ‘tarka’ is not clear in the modern literature on Classical Indian Philosophy. This paper will review different modern readings of this term and try to show that what the Nyāyasūtra and its classical commentaries called a ‘tarka’ should be understood as the following: a tarka is a cognitive act that validates a content (of a doubt or a cognition or a speech-act) by demonstrating its logical fitness or invalidates a content by demonstrating its logical unfitness. (...) A tarka can act as a metatheory too. Generating certainty is, according to the Classical Nyāya, a job assigned to an epistemic instrument ( pramāṇa ). It fails to do so when there arises a doubt regarding it. The moment a tarka dispels the doubt, the epistemic instrument generates certainty. Tarkas of different types will be exemplified by critically analyzing Gaṅgeśa’s applications of tarka in his magnum opus Tattvacintāmaṇi . These examples will clarify the definition of tarka formulated in this paper. (shrink)

In his celebrated treatise of Navya-nyāya, the Tattvacintāmaṇi, Gaṅgeśa offers a detailed formulation of the inference of God’s existence. Gaṅgeśa’s inference generated significant commentarial literature among Naiyāyikas in Mithilā, Navadvīpa and Vārāṇasī, but also attracted the attention of South Indian scholars, notably Vyāsatīrtha, who comments on it extensively in the Tarkatāṇḍava. In the wake of Vyāsatīrtha’s pioneering critique, the 16th-century Sanskrit polymath Appaya Dīkṣita developed a revised version of Gaṅgeśa’s inference in his magnum opus of Śivādvaita Vedānta, the Śivārkamaṇidīpikā. This (...) article highlights that Appaya was thoroughly acquainted with the technical idiom of Navya-nyāya and sufficiently conversant with its literature to address authoritatively one of its key problems. Appaya’s contribution sheds new light on how the Navya-nyāya tradition continued to flourish in South India during the late medieval period. (shrink)