yathārthaniścayāyāṅgamapramāṇaṃ kathaṃ bhavet // saiṣā triṣvapi yathokteṣu pratītiḥ prāmāṇyāṅgatveneṣṭā kimapramāṇamāhosvit pramāṇam iti kalpanādvayam /
How can something invalid be a factor in the ascertainment of truth? Regarding this cognition of the three factors mentioned before, which is accepted as contributing to validity, [there arise] two alternatives: "Is it invalid or is it valid?"