yasmāt sākṣādanumeyāprakāśakatvaṃ tasmān na śrotrapekṣayā vacasaḥ prāmāṇyamavinābhāvasambandhajñānavad iti vākyārthaḥ / avinābhāvaḥ sādhyena sādhanasya, sa eva sambandhaḥ sādhyena yasya liṅgasyatasya jñānam iti vigrahaḥ /
The meaning is: because it does not directly reveal the object to be inferred, therefore verbal expression cannot be considered a valid means of cognition with respect to the hearer, like the cognition of invariable concomitance. [Here] "invariable concomitance" [means] of the probans with the probandum, and [refers to] the cognition of that mark which has such a relation with the probandum.