The Dunning–Kruger Effect - David Dunning

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This is the psychological principle that “a little knowledge is a dangerous thing”. Basically beginners overestimate their ability because they are unaware of what they don’t know.

Dunning, D. (2011). The Dunning–Kruger effect: On being ignorant of one's own ignorance. In Advances in experimental social psychology (Vol. 44, pp. 247-296). Academic Press.