This construction is concerned with someone becoming aware of some outside phenomenon. The difference with the Coming_to_believe "V that" construction is that this is achieved through observation, as opposed to being the result of reasoning or some other kind of cognitive process.

Verification check E.g. They should check that their dentists are using masks. double-check E.g. You should always double-check that the patient is sitting up safely. certify E.g. This is to certify that in my opinion you are unfit to work. confirm E.g. Police confirmed that the 10-year-old 's remains had been found at two waterfront locations. verify E.g. The scans verify that shoppers are scanning goods correctly. Hearsay hear E.g. He heard that a huge tidal wave had struck the island. read E.g. He read that many metals can be magnetized. Becoming_aware discern E.g. At last I could discern that Keith really is a good guitarist. discover E.g. We may discover that particular combinations of species are not stable. find E.g. They find that it's just too difficult. find out E.g. I found out that Eric was lifting names from Monty Python. learn E.g. We have learnt that that does not work. note E.g. Kelly noted that his hands were so soft. notice E.g. She noticed that his fingers were trembling. observe E.g. He observed that the flow of air will follow a curved surface. perceive E.g. She perceived that she had shocked him deeply. recognize E.g. We recognise that our existence is governed by material realities. register E.g. Her body registered that something new had happened to it. see E.g. She saw that several other people had also left to get some fresh air. twig E.g. Then I twigged that they were illegal immigrants.