Which consciousness can know perfectly and clearly without relying on mental thoughts?

In the Śūraṅgama Sūtra there is a passage: 如此会中摩诃迦叶，久灭意根，圆明了知不因心念。Question: When it says that Mahākāśyapa has long extinguished the manas, which consciousness does this refer to as being extinguished? And what does it mean to extinguish?

Answer: A person with the superknowledge of knowing others' minds can perceive others' mental thoughts anytime and anywhere, as long as the other person has mental thoughts. If the other person is rather deep and reserved, without mental thoughts, or if the other person possesses meditative concentration (samādhi) and does not give rise to thoughts at will, then their mental thoughts cannot be perceived, and the superknowledge of knowing others' minds becomes useless. Which mind's thoughts does this "mental thought" refer to?

What the superknowledge of knowing others' minds perceives are the mental thoughts of the mind consciousness, because the mental thoughts of the mind consciousness involve language, words, or sounds—and sounds include the inner voice of the mind. In this way, the mental activities of the mind consciousness take on an observable form and are easy to discern. The mental thoughts of the manas, however, have no language, words, or sounds, and lack obvious observable characteristics, making them difficult to discern. To discern the mental activities of the manas, one must do so through bodily, verbal, and mental actions, discerning them through the workings of the physical faculties and the mind consciousness.

So when Mahākāśyapa is said to have long extinguished the manas, what was extinguished such that he can know with perfect clarity, not relying on mental thoughts? This "mental thought" certainly refers to the mental thoughts of the mind consciousness. Mahākāśyapa's knowing with perfect clarity is not through the knowing of the mind consciousness; it is the manas knowing directly, knowing the realms of the six sense objects both inner and outer, directly substituting for the knowing of the six consciousnesses. Therefore, what Mahākāśyapa extinguished was the mind consciousness and its mental thoughts, not the manas. If the manas had been extinguished, Mahākāśyapa's five aggregates would no longer exist, and he would have entered Nirvāṇa without remainder (Anupadhiśeṣa-nirvāṇa).