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In Plato’s Phaedrus, Socrates tells the story of Theuth. He's the Egyptian figure credited with inventing writing. Theuth offers it as a gift, a powerful tool that will aid in memory and make people wiser. But King Thamus isn't persuaded. Writing, he says, will not deepen wisdom at all. It will weaken memory by moving knowledge outside the mind, and it will leave people with the appearance of understanding rather than the real thing. Writing didn't destroy thought. It became one of its great vessels of expression.