hetutvasaṃskṛtatvādes tu hetoḥ kathaṃ sādhyavipakṣeṇa virodha ity āha nityasyetyādi / nityasya hetutā pūrvaṃ kramākramavirodhataḥ /
How is there contradiction between the reason [consisting of] being a cause, being conditioned, etc., and the opposite of what is to be proved? This is addressed by "nityasya" etc.: The causality of an eternal [thing] was previously rejected due to the contradiction of [effects occurring] successively or simultaneously.