Rasarnavasudhakara 3.254.p2

3.254.p2

atra sveda-cchadmāmṛta-dravotpatter anyathānupapattyā pāṇeḥ pārijātatva-kalpanād iyam arthāpattiḥ |

Here, since the emergence of the liquid nectar under the guise of perspiration cannot be explained otherwise, the hand is presumed to be the pārijāta; thus this is arthāpatti (presumption).