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[Footnote 1: See Nyayabindu@tika, pp. 34 ff., and also Nyayamanjari, pp. 48-63.]
[Footnote 2 Pras’astapada says that as the production of an effect is the sign of the existence of the cause, so the non-production of it is the sign of its non-existence, S’ridbara in commenting upon it says that the non-preception of a sensible object is the sign (li@nga) of its non-existence. But evidently he is not satisfied with the view for he says that non-existence is also directly perceived by the senses (bhavavad abhavo’pindriyagraha@nayogyah) and that there is an actual sense-contact with non-existence which is the collocating cause of the preception of non-existence (abhavendriyasannikar@so’pi abhavagraha@nasamagri), Nyayakandali_, pp. 225-30.]
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in the horse that of the cow); (4) atyantabhava (a negation which always exists—e.g. even when there is a jug here, its negation in other places is not destroyed) [Footnote ref 1].
The necessity of the Acquirement of debating devices for the seeker of Salvation.
It is probable that the Nyaya philosophy arose in an atmosphere of continued disputes and debates; as a consequence of this we find here many terms related to debates which we do not notice in any other system of Indian philosophy. These are tarka, nir@naya, vada, jalpa, vita@n@da, hetvabhasa, chala, jati and nigrahasthana.