syād etad gṛhītagrāhitvaṃ, bhaviṣyati prāmāṇyaṃ ceti, ko 'tra virodha ity āha karaṇārthaviyogata iti /
One might say: "It may [both] apprehend what is already apprehended and be a valid means of knowledge - what contradiction is there in this?" [The answer is] "because it lacks the true character of an instrument."