nāpi pramāṇabhūtāt, tasyāpi tulyaparyanuyogena parataḥprāmāṇyāśaṃsāyām anavasthāprasaṅgāt /
Nor [can validity be expected] from what is valid, because if validity is expected to come from outside for that [valid cognition] too, which faces the same question, an infinite regress would result.