[JabavuAdams]

I'm ashamed to admit I didn't think about inverted flight until I read this article. Shit.

Once I realize something like this it makes me want to go back and do an integration / cleaning pass on my web of knowledge. Not sure how to do that in practice, though.

[Herring]

The only way to know that you know is to test yourself. Find a college aerospace text & solve some problems. Personally I don't care about finding gaps in knowledge that I haven't tested.

[netsp]

René Descartes did that once. I don't think it turned out well.