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is the idea that what you do makes sense.
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And this is one of the more interesting sub domains of social psychology.
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The idea was developed by the social psychologist Leon Festinger
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and it's called "Cognitive Dissonance Theory."
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And what Festinger was interested in was the idea that
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what happens when people experience an inconsistency in their heads.
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And he claimed it causes an unpleasant emotional state,
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what he described as "Dissonance."
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And he argued that we act so as to reduce dissonance.
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When there's a contradiction in our heads
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we're not happy and will take steps to make the contradiction go away.
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This all sounds very general but there are some striking demonstrations