The 50-50-90 rule: Anytime you have a 50-50 chance of getting something right, there's a 90% probability you'll get it wrong.
Numbers are the most certain things we have.
Numbers tend to give the impression that there's more order in the world than there is.
Before a kid learns how to use a computer that can solve mathematical problems, he or she should know how to do arithmetic without a computer.
I'd like to take some calculus, too. I have absolutely no ability in that direction and not much interest, either, but there's something going on in mathematics that I don't understand, and I'd like to find out what it is.
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