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Busted!
Actually, I still have to break my head over a lot of algebraic topology and algebraic geometry. The former I had a not so great course in, the latter I never got a chance to take the intro.
But general tops, especially when taught by the Moore method, would be something I think a lot of the people here who delight in logic would enjoy. And differential tops is something I had a lot of, because I studied dynamical systems and chaos.