vyatirekādapi kāryaniścaye satsu tadanyeṣu samartheṣu taddhetuṣu yasyaikasyābhāve na bhavatītyevam āśrayaṇīyam, anyathā hi kevalaṃ tadabhāve na bhavatītyupadarśane sandigdhamatra tasya sāmarthyaṃ syāt, anyasyāpi tat samarthasyābhāvāt, tataś caivam api sambhāvyeta anyad eva tatra samartham asti, tadabhāvāt tannivṛttaṃ yat punar etan nivṛttau satyām asya nivṛttir upalabhyate sāyadṛcchāsaṃvādaḥ
Also in determining the effect through negative concomitance, one must rely on [the principle that] when other capable causes are present, [the effect] does not occur in the absence of that one [particular cause]; for otherwise, if one merely showed that [the effect] does not occur in the absence of that [cause], its capability would be doubtful here, since another capable [cause] is also absent, and thus it might even be suspected that something else capable exists there, [and] due to its absence that [effect] ceases - whereas what is observed as the cessation of this [effect] upon the cessation of that [cause] would [merely] be an accidental correlation.