nāsattā gamyate, kiṃ tarhi sattaiva / atrānyopalambhāsiddhiḥ, tadbhāvayann āha nanu cetyādi //
"Non-existence is not cognized" means rather existence itself [is cognized]. Here [the issue is] the non-establishment of others' perception, [and] explaining this, he says "nanu ca" etc.