yato 'ścāyāṃ gardabhena jātasya vegasarasya kalalādyavasthāvyavadhāne 'pi gardabharūpānukāreṇa tadvikāritvasya paścād darśanādato nāsmāt sākṣād utpattiḥ sidhyati /
As in the case of a mule which is born from a mare [impregnated] by an ass - even though embryonic and other stages intervene - [its] resemblance to the ass-form is only seen afterwards, therefore direct production from it [i.e. the ass] is not established.