yadyevaṃ vastubhūtatvāt sādhyaṃ tarhi nityatvaṃ prāptam iti paravacanāvakāśamāśaṅkate jñeyam ityādi / jñeyam pramāṇena jñātavyam, sādhyam iti yāvat
[The author] anticipates an opportunity for the opponent's objection: "If this is so, then because [the Veda] is a real entity, eternality would need to be proved" by [using the word] "knowable" etc. "Knowable" means "to be known through a means of valid cognition," that is, "to be proved."