I can't decide whether I hate this or agree with itpic.twitter.com/hZakziWu0c
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I think the idea is that a good exposition doesn't just mention something surprising or even prove it, it gives you a solid intuition for why it is so, thus demystifying it. Yr quote doesn't do this at all; it says true and surprising things w/o explanation.
I don't think all good intuition-building explanations leave the learner feeling de-surprised, but this definitely does happen sometimes.
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