Antecedents and Pervasion
Antecedents of the Catuṣkoṭi have been charted to grammatical structures in the Vedas. The Nasadiya Sukta of the Rigveda (RV 10.129) contains ontological speculation in terms of various logical divisions that were later recast formally as the four circles of catuskoti: "A", "not A", "A and not A", and "not A and not not A".
McEvilley (2002: p. 495) maps an interesting case for mutual iteration and pervasion between Pyrrhonism and Madhyamika:
An extraordinary similarity, that has long been noticed, between Pyrrhonism and Mādhyamika is the formula known in connection with Buddhism as the fourfold negation (catuṣkoṭi) and which in Pyrrhonic form might be called the fourfold indeterminacy.
Read more about this topic: Catuskoti
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