ko hyatra niyamas tenaiva tat kāryaṃ kartavyaṃ nānyeneti, anyo 'pi kuryāt sopīti na virodhaṃ paśyāmaḥ /
For what restriction is there that the effect must be produced by this [cause] alone and not by another? Another [cause] might produce [it] and this one might also [produce it] - we see no contradiction in this.