yatra ca deśe mṛdaṅgādipratiśabdaśravaṇāt pravṛttasya tadarthādhigatir na bhavati tatra visaṃvādād aprāmāṇyaṃ pratyeti
And in a place where someone who proceeds upon hearing what [seems to be] the echo of a drum etc. does not find that object, there he concludes the invalidity [of the cognition] due to the lack of corroboration