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VAISHALI INSTITUTE RESEARCH BULLETIN NO. 2
bitterly criticised by his younger contemporaries in Jñánaśrimitra and his pupil Ratnakirti (early 1lth cent. A. D.). Both of them also were rebutted by their junior contemporary Naiya yika opponent in mighty Udayanāchārya who in his Nyaya-vārtikasatparya-parisuddhi, Atmatattva-viveka and other works ruthlessly criticised all the Budd. hist views held by them and their predecessors. His logical arguinents were considered to be irrefutable.
The importance of the Vada-rahasya lies in the fact that it reveals that the logical duel started long before could not end finally with Udayanācharya in the later part of the 11th century but it continued further. Though the name of the author of this work is not known he seems to be a junior contemporary of Udayana. This may be proved on the evidence of Palaeography and the numerical figures which belong to the closing part of the 11th cent. or carly 12th cent. He may be one of the pupils or grand pupil of Jñanaśrīmitra or Ratnakirti.
No other copies of this MS have yet been discovered. The words 63c4a79 gadi fantü genel on the title page indicate that the Vada-rahasya was not only the book related to the criticism of Udayana but there was another work also, whose discovery is eagerly awaited.
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