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This is Paul Ekman again.
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Which one's a better smile?
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Who votes for the one on the right?
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Who votes for the one on the left?
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There are two different sorts of smiles.
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The one on the right is a smile of greeting.
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It's sometimes known as a "Pan Am" Smile.
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Pan Am is a now defunct airline which had at that time
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--They were--They don't call them stewardesses anymore
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but they're--the stewardesses would come in and they would smile.
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That was part of their job.
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But it was a big, fake smile,