nanvanyāpohavācyatvāj jātiśabdastu kevalaḥ / vivakṣāparatantratvād vivakṣāśabda eva vā //
"Since [all] words denote 'exclusion of others' (anyāpoha), they should all be either common nouns only, or, since they depend on the speaker's intention, they should all be proper names only." 