aviddhakarṇas tatvaṭīkāyām āha nanu vā pramāṇena kimiti paraḥ pratipādyate, ubhayasiddhaṃ hi pratipādakaṃ bhavatīti /
Aviddhakarṇa says in the Tattvaṭīkā: "But what is being conveyed to the opponent by [this] means of knowledge? For that which conveys [knowledge] must be established for both [parties]."