atra ca śabdasya nityavyāpitvam antareṇa sarvasmin kāle deśe ca na grahaṇaṃ siddhyatītyato nityavibhutve śabdasyānyathānupapattyā siddhe //
In the present instance, if sound did not possess eternality and all-pervadingness, [its] apprehension at all times and places would not be possible; hence, the eternality and all-pervadingness of sound is established through the impossibility-of-otherwise (anyathānupapatti).