In order to know how good you are at something requires exactly the same skills as it does to be good at that thing in the first place, which means — and this is terribly funny — that if you are absolutely no good at something at all, then you lack exactly the skills you need to know that you are absolutely no good at it.”
Corollario: "highly skilled individuals may underestimate their relative competence and may erroneously assume that tasks which are easy for them are also easy for others."
How to Be an Individual in Age of the Echo Chamber
The Atir-Rosenzweig-Dunning Effect: When Experts Claim to Know the Unknowable
Perchè alcuni ignoranti sono certi di avere ragione
The Dunning-Kruger effect, or why the ignorant think they’re experts