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A SOURCE-BOOK IN JAINA PHILOSOPHY
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(ii) presentation of own school of thought in a systematic way. This dual function of refutation and presentation (Khaṇḍana-maṇḍana) of the logical discussion is the most important contribution of this age of pramāṇaśāstra.
AGE OF THE NEO-NYAYA (NAVYA-NYAYA) +3
In the development of the Indian logic, the appearance of the book Tattvacintamani gave a new turn to the development of logic which may be called Neo-logic. The credit for this revolutionary change from logic to Neo-logic goes to a brilliant writer of the 13th century, a Naiyāyika, named Gangeśa. In Tattvacintāmaṇi, the author has used new terminology of logic and written in a new style This work is the most prominent work in the Indian logic and meta physics of this age. Tattvacintamani discusses the naiyayika theory of pramāņas mentioning four pramāņas beginning with pratyakṣa. The language and the style used for discussing logical problems in this work by Gangeśa are entirely new. He has discussed the problems which are very terse and purely academic in a language which attracts and appeals even to the common man. Many scholars have written commentaries on Gangeśa's Tattvacintamani. Tattvacintāmaṇi brought about a new turn in the development of Indian logic. The Buddhist scholars were influenced by this new wave. The Jaina scholars also could not escape from the powerful trend of this thought. The style of navya-nyāya made a profound influence on the Jaina acāryas. The books on Jaina logic were, however, being written in the earlier style and tradition up to the end of the 17th century A. D. It was only in the beginning of the 18th century that Upadhyaya Yaśovijaya wrote his work on Nyaya in the navya-nyāya style. His work anekanta vyavastha written in the Neo-nyāya style helped the re-establishment of the Anekantavāda. Similarly, Jainatarkabhāṣya and Jñānabindu were two important contributions to the Jaina pramāṇaśāstra. Nayapradipa, Nayarahasya and Nayopadiṣṭa were important works on nayavāda. A commentary on Nayopadeśa called Nayamṛtatarangini is an important work. An explanatory work on Aṣṭasahasri was also written. Similarly, a commentary on Śāstravārtāsamuccaya of Haribhadra was written. It is called Syādvādakalpalată. Several other books like Bhāṣārahasya, Vādarahasya helped the dual function of refuting the naiyayika logic and presenting the Neo-logic of the Jainas. Apart from Yasovijayji, we find that Yaśasvatasāgara
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