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We are linked by a chain of fewer than seven acquaintances with anyone in the world, so be kind to those you meet

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William Wan

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There is a trivia game called "Six Degrees of Kevin Bacon", where movie buffs try to link any actor, no matter how obscure, to the Hollywood actor within six steps.
That game, in turn, is based on the theory that we are just six introductions away from any other person on the planet.
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