That know-it-all who drives you crazy is full of it, according to science

Do you know someone who claims to be THE source on one particular thing, be it politics, religion, relationships, or etiquette? There are movies, music, and sports know-it-alls too. No matter the kind, few people can be quite as irksome. Want to stick it to the know-it-all in your life? Just casually mention ...

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