tadanvayavyatirekānuvidhāyitvamātram eva tat kāryatāvyavahṛter aṅgaṃ nānyat, ataḥ kāryatāvyavahārasya nimittāntarāsambhavo bādhakaṃ pramāṇam iti siddhā vyāptiḥ
Only this conformity to positive and negative concomitance is the basis for treating [something] as an effect, nothing else. Hence, the impossibility of any other cause for treating [something] as an effect serves as the annulling evidence, [and thus] the invariable concomitance is established.