The Nyaya Sutra sets out the valid means of knowledge, the structure of an inference, the rules of definition, the catalogue of fallacies, and the procedure of formal debate — the method the other schools argue in.
Nyaya Sutra
Date disputed; the sutras were added to over time · disputed · disputed
The text is layered and its commentaries are much later
Unknown or disputed.
Philosophy, logic and critical thinking · CBSE (KTPI) · IB · A-level — Nyaya and Tarka; the six darshanas. Valid means of knowledge, inference and its structure, definition, fallacy, the rules of formal debate and refutation.
Evidence: traditionally attributed · no modern scholarly reference recorded yet.