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Here's where 'gaslighting' got its name

We’ve been exposed to a lot of nastiness during this campaign season. As well as a few choice words. Some vulgar. Some made up. And one that dates back to a British play from the 1930s.

(A scene from a film version of 'Gaslight’ directed by Thorold Dickinson and based on the play by the same name. Credit: Hulton Archive/Getty Image)

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4 minutes