Other people show no sign of this, yet claim to learn. I still haven't figured out what is going on here. The possibilities I can think of are: 1) Their learning process involves no clicking 2) They hide the click to make it sound like they've known it all along because they'd be embarassed at how late their click is 3) They're faking it, and don't really get it.

How about 4) they don't really get it, and just think they do, or 5) they don't realize there's anything to "get" in the first place, because they think knowledge is a mysterious thing that you memorize and regurgitate. I think that's actually the most common case, but the others are perhaps plausible as well.