nanu ca doṣābhāvaniścayāt prāmāṇye 'bhyupagamyamāne 'pyanavasthaiveti paramatamāśaṅkayann āha doṣābhāva ityādi
[The opponent], anticipating the other view that "even if validity is accepted based on the certainty of absence of defects, there would still be infinite regress," states [the verse beginning with] "doṣābhāva."