Paul Erdos Quotes on Science
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Aliens invade the earth and threaten to obliterate it in a year's time unless human beings can find the Ramsey number for red five and blue five. We could marshal the world's best minds and fastest computers, and within a year we could probably calculate the value. If the aliens demanded the Ramsey number for red six and blue six, however, we would have no choice but to launch a preemptive attack.
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A mathematician is a device for turning coffee into theorems.
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God may not play dice with the universe, but something strange is going on with the prime numbers.