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Between Vatsyayana and Vacaspati, the Nyayabhasyavarttika reigns supreme as the only work by Uddyatakara. It explains, true to the definition of a Varittika, nearly every word of the Nyayabhasya, adds fresh elements and sometimes criticizes the earlier position. In this work, it is it is claimed the original views of Aksapada, the father of Nyaya, have been rescued rom the onslaught of 'bad logicians'. Vacaspati subsequently identifies these 'bad logicians' with Nagarjuna, Vasubandhu and Dignaga. Concerning dought, liberations, fallacies, refutation of the Buddhist theories of momentaryness, difference theory of meanings of general words, relation of part and whole, etc., clear philosophical advancement is evinced in the varttika. As the  second volume of the vast Nyaya - chaturgranthika project, this edition is unique in providing a critical text based on hitherto undiscovered source material, as well as giving all the variants in the footnotes. These sources have for the first time enabled the editor to reconstruct an unmutilated version of the Varttika on I.i.9 which was hopelessly fragmented before.

'The illuminator' - That is what his name meant. And the light he threw on the criptic wotk of Aksapada and Vatsyayana - the only two predecessors he mentiones by name - is so bright that it still dazzles us across, atleast twelve centuries. Yet, his persoal history, even his birth place remains shrouded in doubt and darkness. A discendent of the Bharadvaja clan. Uddyotakara is said to have een a Pasupata acarya. He succeeded Dignaga and was known to Subandhu whom Banabhatta praised. Judging from the indirect allusion to rival logicians, his name seems to have been one of great vitality and variety of views in Indian logic. Hence Udayana's characterisation of Uddyotakara's time as the youth of the vedic school of logic. Besides poviding Dharmakirti and his successor with a vigorous target, it was Uddyotakara who preserved, through his accurate representation, albeit for the sake of refutation, the views of great Buddhist thinkers like Nagarjuna, Vasubandhu and Dignaga. While foreign invaders demolished monasteries and manuscripts, it was Uddyotakara who was immortalizing the Buddhist philosophical position.