prayogaḥ yaḥ saṃśayaviparyāsarahitaḥ pratyayaḥ sa prekṣāvatāṃ pramāṇavyavahāraviṣayaḥ yathā vahnāvabhrāntacetaso dāhapākādyarthinastanniścayahetuḥ pratyayaḥ saṃśayaviparyāsarahitaścāgnihotrādivākyodbhava pratyaya iti svabhāvahetuḥ /
The formal argument: That cognition which is free from doubt and error is regarded as valid by discerning people, just as the cognition of fire [had by] one whose mind is not deluded [and] who desires burning and cooking, etc.; and the cognition arising from sentences about the Agnihotra, etc. is free from doubt and error - this is an argument based on essential nature.