naca tebhya uttarakālabhāvibhyaḥ pratyayebhyaḥ prathamasya prāmāṇyaṃ yuktaṃ teṣāṃ gṛhītaviṣayatvena svayam evāpramāṇatvāt //
The validity of [this] first cognition cannot be due to those subsequent cognitions, because they themselves are invalid, since they [merely] apprehend what has already been apprehended.