Their other hits include Ain't Nothing Like The Real Thing, one of several tracks written for duo Marvin Gaye and Tammi Terrell, and Diana Ross's first solo single, Reach Out and Touch (Somebody's Hand).

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Computer models are often used for simplicity, or when studying the real thing just ain't viable, but most look at an isolated process.

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Even better than the real thing: It won't try to eat you.

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"Maybe you don't want your daughter to dress like that, but that's the real thing, " says top marketer Light.

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"Pitt is a handsome guy, but if you saw him in real-life or HDTV, which is roughly the same thing, you wouldn't think he was so beautiful, " Swann says.

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