A mathematician

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A mathematician, a physicist, a civil engineer, and a computer programmer are asked (after a few beers) to show that all odd numbers greater than 1 are prime. mathematician: 3 is prime, 5 is prime, by induction they're all prime. physicist: 3 is prime, 5 is prime, 7 is prime, 9 is... experimental error, 11 is prime, 13 is prime -- clearly, they're all prime. civil engineer: 3 is prime, 5 is prime 7 is prime, 9 is prime, 11 is prime -- sure, they're all prime. programmer: 3 is prime, 5 is prime, 7 is prime, 7 is prime, 7 is prime, 7 is prime, 7 is prime......

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