ata eva katham idaṃ gamyate tatkṣaṇikamityādiparyanuyogaḥ prativādinā kriyamāṇo viphala eva tasya vādinā kṣaṇikatvena sādhayitumaniṣṭatvāt
Therefore, when the opponent raises such questions as "How is it known that this is momentary?", [such questioning] is entirely futile, because the proponent does not wish to prove its momentariness.