There's a parable about a group of blind men who set out to learn what an elephant looks like. Each man, touching a part of the animal, came to a different conclusion. The one who felt the tusk was convinced the elephant looked like a plowshare. Another concluded, after feeling a leg, that it looked like a pillar. The one who happened to pull on the tail argued it looked like a pestle. So they argued endlessly, each backing his theory with his own experience.
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