yathā cānumānena pratyakṣasya prāmāṇyaṃ sādhyate tathā pūrvam uktam / tadeva smārayati śuddhakāraṇajanyatvāt pramāṇam iti /
How the validity of perception can be proved by inference has been explained before; this is what is recalled [here] through [the words] "because it arises from pure causes, it is valid."