saṃjñāpakapramāṇaviṣasya bhāvatattvaṃ sadupalambhakapramāṇaviṣayatvaṃ nāma dharmāntaraṃ ṣaṇṇām astitvam iṣyata ity arthaḥ /
The meaning is that "the existence of the six [categories] is claimed to be a distinct property consisting in their being objects of such means of valid cognition as apprehend existing things."