I have repeatedly complained about incompetence, and I think it's about time to point my readers' attention for a short while at the Dunning-Kruger effect.
The Dunning–Kruger effect is a cognitive bias in which unskilled individuals suffer from illusory superiority, mistakenly rating their ability much higher than average. This bias is attributed to a metacognitive inability of the unskilled to recognize their mistakes.
Actual competence may weaken self-confidence, as competent individuals may falsely assume that others have an equivalent understanding. As Kruger and Dunning conclude, "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".
Kruger and Dunning proposed that, for a given skill, incompetent people will:
(1) tend to overestimate their own level of skill;
(2) fail to recognize genuine skill in others;
(3) fail to recognize the extremity of their inadequacy;
(4) recognize and acknowledge their own previous lack of skill, if they are exposed to training for that skill
It's no wonder we get things wrong so often; people still trust more those who are confident and have a firm opinion than those who admit that their knowledge has limits and a problem is tricky.
Keep the Dunning-Kruger effect in mind when you listen to politicians, experts, analysts and the likes. You're of course also free to keep it in mind when someone disagrees with you, for it opens up the possibility that he simply cannot see your genius. ;-)
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(As usual, I am unable to exclude the possibility that I am under influence of this phenomenon at times. It's in the nature of the beast that I couldn't tell.)