buddhyākārasyānapekṣitabāhyārthāvalambanasya vidhirūpasyaiva śabdārthatvāpatteḥ / tataścābhyupagamabādhā pratijñāyā iti bhāvaḥ //
Because the form of cognition—which is positive in nature and independent of any external referent—would become the meaning of words. And thus [there would be] a contradiction of [your] own accepted position by [your] proposition—this is the idea.