anyathānupapattisahitāṃ sajātīyasiddhatāṃ vijātīyavyāvṛttiṃ cābhisamīkṣya dvilakṣaṇaḥ, anyathānupapannatvaṃ sajātīyavṛttiḥ sādhyavipakṣāc ca vyāvṛttir iti trilakṣaṇaḥ /
When [a probans] possesses 'being otherwise impossible' along with existence in similar cases and non-existence in dissimilar cases, it is 'two-featured'; and when it possesses 'being otherwise impossible' along with existence in similar cases and absence where the probandum is absent, it is 'three-featured'.