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'Looper' takes the nonsense out of time travel movies

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Time travel movies can be so much fun -- and so infuriatingly nonsensical. As soon as a character travels from the future into the past -- which typically is the audience's present -- the question arises of how his or her actions change the past. If those changes affect the character, how can it be the "old" version of the character who travels back in time? Such concerns can take a viewer out...

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