Navya-nyāya in the Late Vijayanagara Period: Appaya Dīkṣita’s Revision of Gaṅgeśa’s īśvarānumāna

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.