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Tamas and Chāyā in the Jaina view
alternative that tamas is of the nature of just negation is accepted, perception would evidently be contradicted. And the reason advanced would be a Kālātyayā padista ( mistimed or contradicted ) one as it would be one employed after a reference to the thesis as one contradicted by perception. And there would also be the fault of Sadhyavaikalya, as here in this stand it is not tenable that the example put forth, viz. destruction of jar, be of the nature of just negation. For it has been established in Jaina philosophy that destruction or posterior negation of jar is but the earth-substance, which giving up its prior mode called ghaļa (jar) is now qualified by the subsequent mode called kapāla (potsherd). Therefore one should not adhere to the view that tamas is of the nature of just negation.
But if the stand is taken that it is also of the nature of Degation, then it amounts to siddha-sadhyatā-proving what is already proved, for there would be no reason for there being any difference of opinion. The Jainas themselves accept the substance tamas as in a way (or from one point of view) of the nature of the negation of light for all things are of the nature of both thāva and abhāva.
Moreover, the probans and the probandum being mutually dependent are unreal and so the reason is unreal (asiddha). Only if tamas be of the nature of negation (abhāva), could it be said to be an effect different from substance, quality and action, and only when the latter is proved could tamas be known as of the nature of negation. And the thesis here (i.e. the one put forth by the Vaišeşika ) is one that is sublated by inference. To wit, the inferential argument is :
"Darkness is positive in character, as it covers pot, etc., like a piece of cloth”. And that it covers pot, etc. is not something that is not proved, for tamas is something that serves as a cover for pot etc. as it checks or arrests the operation of the eye in respect of the object, even as the curtain does. SP-6
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