Syadvada

The method

Syat is often mistranslated as "perhaps", which makes the doctrine sound like scepticism. It is closer to "from a certain standpoint". The claim is not that one cannot know whether a thing is so, but that it is so under a specifiable aspect, and that the qualification should be stated rather than assumed.

Applied systematically this yields seven forms: a thing is; it is not; it both is and is not; it is inexpressible; it is and is inexpressible; it is not and is inexpressible; it both is and is not and is inexpressible. The fourth arises when existence and non-existence are asserted simultaneously rather than successively, which Jain logicians held could not be expressed in a single predicate.

Its use

The scheme was a weapon in classical debate. Buddhist opponents held that things are momentary; Vedanta held that reality is unchanging. Jain writers used syadvada to argue that a substance persists while its modes change, so that permanence and impermanence are both truly predicated of it in different respects, and that the opposing schools had each absolutised a partial view.

It also underwrote a characteristic Jain attitude to rival doctrines: not that they are false, but that they are one-sided. Haribhadra's comparative surveys of philosophical schools, unusually even-handed for their period, follow from this.

Criticism

The doctrine attracted sustained attack. The Vedantin Shankara argued that contradictory properties cannot belong to one thing and that the scheme collapses into incoherence; Buddhist logicians pressed the self-reference problem — whether syadvada is itself only conditionally true. Jain writers answered that the qualifications are not contradictory because the respects differ, and that the doctrine applies to itself without damage. The exchange runs through several centuries of Indian philosophical literature and is among the more technical in it.