The Dunning-Kruger Effect

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When people believe they are way more — tremendously more — competent than they actually are.
Sound familiar? We all know people like this (boy, do we these days!), and the cause is fairly straightforward — the cognitive bias of illusory superiority results from an internal illusion in people of low ability and from an external misperception in people of high ability; that is, “the miscalibration of the incompetent stems from an error about the self, whereas the miscalibration of the highly competent stems from an error about others.” (/via Wiki )
Anyhow, in song…

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