Apparently these guys are much more candid in closed door hearings. No grandstanding. We’ll never see a transcript, all we can do is digest the crumb and see how things transpire.
We might. There was a different closed-door hearing recently, transcript disclosed to the public. I forget what committee, maybe House or Senate Intelliegence.
It’s more difficult to lie under oath when they have a document that has you dead to right. Or a picture of you committing treason.
Standard practice is to ask the question that you know the answer to. If they lie, or claim they don’t recall, show them the document that proves what they did, and ask again. Catch them in a few lies, and they eventually think you have documents to prove the truth even when you don’t.