agotaḥ vinivṛttiḥ ca gauḥ vilakṣaṇaḥ iṣyate / bhāvaḥ eva tatas na ayam gauḥ agoḥ me prasajyate // 
The cow, which is ‘the negation of the non-cow’ is held to be a positive entity, and of a character different from that of the non-cow; but by this the non-cow does not become the cow, for me 