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To cheat or not to cheat...
Can you imagine such an affair? Mankind being graded? On what? His hairstyles, his automobiles, how far he can walk when his fashionable jeans are around his knees? Or maybe, how many piercings he can get through one nostril? Grade him on anything but his merits!
In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.