“You do not really understand something unless you can explain it to your grandmother.”

Albert Einstein

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1488 "Imagination is more important than knowledge"
2179 You have to learn the rules of the game. And then you have to play better than anyone else.
1825 “Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.”
636 Reality is merely an illusion, albeit a very persistent one.
1831 The important thing is not to stop questioning

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