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Three blind men are led to an elephant, and invited to touch it and 'see' what they make of it.
One blind man bumps up against a leg, encircles it with his arms and declares, "The elephant is like the trunk of a tree."
Another blind man takes hold of the elephant's trunk and says, "The elephant is a great serpent."
The third blind man grasps the end of the elephant's tail and says, "The elephant is a big, coarse brush with a flexible handle."
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Here's a visual iteration of the parable:
And by the way, I am not nearly as wealthy as that last photograph makes it appear that I am.