parato 'pyupalambhāt tasya siddhir nāvakalpata, kutaḥ, abhāvāt abhāvātmakatvāt, upalambhasya bhāvaviṣayatvāt
Its establishment through apprehension by something else is also not possible; why? Because being of the nature of absence [i.e. negative], apprehension can only have positive entities as its objects