aniṣṭāpattir hi prasaṅga ucyate, na ca pratyakṣasyānumānataḥ prāmāṇyasiddhir neṣṭā, yena prasaṅgāpādanaṃ syāt /
A reductio ad absurdum is said to be that which points to an undesirable consequence; but the establishment of the validity of perception through inference is not undesirable, so this cannot be [considered] a reductio ad absurdum.