tatra yadi mukhyato bāhyena viṣayabhūtena sanimittatvam eṣāṃ sādhayitum iṣṭam, tadānaikāntikatā hetoḥ, sādhyaviparyaye bādhakapramāṇābhāvāt.
In this regard, if what is desired to be proved is primarily their having a basis in an external object-entity, then the reason is inconclusive, because there is no contradicting valid cognition for the opposite of what is to be proved.