ādyād iti prathamādvacanānniściterasadbhāvo sati parataḥ uttarakālabhāvino vacanadvayāt asau niścitir naiva syād viśeṣābhāvāt
"From the first" means from the first statement; if certainty does not exist [arising] from that, then that certainty cannot arise from later [statements], i.e. from the two statements occurring afterwards, due to absence of any special [distinguishing] feature