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You know the story about the king who could only afford to keep on one of his three advisors, don’t you? He needed to save some cash so he called together his three advisors: an engineer, a mathematician, and a statistician. He said “I’m going to ask you each the same question. He who gives the best answer keeps his job” “Engineer… what is two plus two?” “Well sire, it’s not a complex problem. The answer is four. But anything between 3.8 and 4.2 would do” “Mathematician… what is two plus two?” “Sire, this is basic. Both operands are members of the natural numbers, so the result of the operator must also be. The answer is exactly four” “Statistician… what is two plus two?” “Well sire …what would you like it to be?””