agovyavacchedena gopratipattiḥ, sacāgaur goniṣedhātmā, tataścāgaur ityatrottarapadārtho vaktavyo yo na gaurgaurityatra naṭā pratiṣidhyeta
The cognition of 'cow' [occurs] through the exclusion of non-cow; and that non-cow consists in the negation of cow; therefore in [the compound] 'non-cow', the meaning of the latter term must be explained — [that meaning] which is negated by the negative particle in [the expression] 'not cow'.