athādṛṣṭasāmarthyasyāpi hetutvaṃ kalpyate tadā saṃskāraḥ, anyo 'pi vā śukabakādirutpatter heturbhavet / kalpanīya iti śeṣaḥ /
If it is supposed that "even though its potency is unobserved, causality might still be assumed," then either momentum or anything else, such as parrots and cranes, could be [assumed to be] the cause of origination. [The phrase] "could be assumed" is to be supplied [at the end].