Nyayasutra 75.4

75.4

traikālyāsiddher ity asya hetor yady udāharaṇam upādīyate hetvarthasya sādhakatvaṃ dṛṣṭānte darśayitavyam iti,

If an example is adduced for this reason, "because establishment across the three times is impossible," it must be shown in the example that the meaning of the logical reason has the capacity to prove [the probandum];