प्रामाण्यवाद: (Prāmāṇyavādaḥ)

In this book Jagadīa Tarkālaṃkāra presents a detailed analysis of various aspects of śabdapramāṇa from the perspective of Navya-Nyāya. The book starts with a critical assessment of the views of Vaiśeṣika and Mīmāṃsaka philosophers with regard to the veridicality of śabda as a pramāṇa. This is followed by a discourse on the nature of meaningful words, the nature of prākṛti, pratya, nipāta. A definition of a sentence is formulated. The relation between word and meaning in its different aspects has been presented. The book ends with a discussion on the nature and different kinds of samāsa.

Harirama Tarkavagisa, in this book, examines the proposal that inference could be subsumed under supersensual perception as accepted in Nyāya. Harirama argues that not all cases of inference could be so explained. He imagines all sorts of possible objections to the view that inference, really speaking, is a kind of perception and refutes all these, defending the thesis that inference is to be regarded as an independent source of knowledge.

In this book, Gadādhara Bhattāchārya presents a theory of the meaning of words. This work is divided into three chapters: 1. Sāmānyakāṇḍa, 2. Viśesakāṣḍa and 3. Pariśiṣtakāṇḍa. In Sāmānyakaṇḍa, the author undertakes a detailed analysis of vṛtti of words. Here one comes across a definition of śakti in terms of which a word denotes its meaning. The theory of anvitābhidhāna has been refuted. In the Viśeṣakaṇḍa, the author undertakes an analysis of the meaning of words denoting an individual and the meaning of the words denoting a universal. Prabhākara theory of meaning has been refuted. This chapter contains an analysis of indexicals and demonstratives. The third chapter viz. Pariśiṣtakaṇḍa contains a defence of the view that the śakti of a word lies in the individual that is qualified by the corresponding universal. Views of several Mīmāṃsaka philosophers have been critically assessed.

In these two volumes, Gadādhara Bhhattācārya offers a detailed analysis of the views found in Tattvacintāmaṇi of Gaṅgeśa and in Dīdhiti of Raghunātha Śiromaṇi. Almost all the major conclusions of Navya-Nyāya have been explained with great defence.

This is perhaps the most authentic history of Navya-Nyāya scholarship in Bengal with special emphasis on Navadvipa. In this book, the author presents a detailed description of the biographies and the works of the philosophers of Navadvipa. The author divides his work in the following chapters: 1. The Pre-Śiromaṇī age, 2.Raghunātha Śiromaṇī, 3. Bengali Commentators on Śiromaṇī, 4. The Post-Gadādhara Era, 5. Bengali Naiyāyikas in Kāśidhāma, 6. Nyaya Schools of Bengal. The author, with sufficient historical evidence, determines the time of many of the Navya-Nyāya scholars and he also proposes his views on the authorship of many of the Navya-Nyāya commentaries.