satyam evam etat, anvayavyatirekābhyāṃ tu vijñānotpādakam eva trairūpyamanumānādau prāmāṇyotpādakaṃ dṛṣṭam iti pratyakṣe 'pi ca sambhavāt tadevotpādakaṃ kalpyate
True, this is so; but through positive and negative concomitance, it is observed in inference that the three-fold characteristic which produces cognition also produces validity, and since this is possible in perception too, that same [cause] is assumed to be the producer [of validity].