> You just have a sensation of "getting it" for whatever problem happens to be on your mind, even if asking you to articulate it right then would result in nons

> You just have a sensation of "getting it" for whatever problem happens to be on your mind, even if asking you to articulate it right then would result in nonsense because the sensation is actually backed by nothing at all. Another example of this is when you are drifting towards sleep and thoughts start careening through your head. At some point you might have observed that you had a wonderful "aha" moment where it all just "clicked". But when you attempt to backtrack to check what it is that suddenly made so much sense, you grasp at straws (worst feeling ever) ... Feynman wrote about this in his bio and I remember bookmarking it because I totally understood what he was talking about. Let me see if I can find it right now. EDIT: "One thing that often happened was that as the hallucination was coming on, what you might describe as "garbage" would come: there were simply chaotic images ­­ complete, random junk. I tried to remember some of the items of the junk in order to be able to characterize it again, but it was particularly difficult to remember. I think I was getting close to the kind of thing that happens when you begin to fall asleep: There are apparent logical connections, but when you try to remember what made you think of what you're thinking about, you can't remember. As a matter of fact, you soon forget what it is that you're trying to remember" - Richard P Feynman (Surely You're Joking Mr. Feynman)