Thinking about all the "INAL" answers and the obviously wrong "legal" advice and opinion on legal topics you can come across on HN on a daily basis, I think law is good example of people overestimating their knowledge.
Replace figure skating with any other sports, so, and try having discussions about, e.g, a defeat of any soccer team. All of a sudden everyone just became a soccer coach. And everyone is able to critique individual player's performance and skill and technique. If anything, this proofs the DK effect rather well.
You might be forgetting that DK demonstrates a positive correlation between confidence and skill. They gave statistical evidence for people who believe they’re right actually being right more often on average. The question the paper is actually asking is why aren’t people’s self-estimates perfect, but it does not, contrary to popular misunderstanding, demonstrate that confident people are lower skilled. Reading bad legal advice on HN is not a demonstration of the so-called DK effect.
But is DK not explicitly about assessing yourself and not about assessing others?
I feel like being able to critique the performance of others is different from being able to critique yourself. There might be a correlation between the two, but they're not the same.
The DK paper is not about assessing one’s self. There was a self-eval, but the primary methodology used for most of the data & conclusions was to rank one’s self against the others in the group! You are spot on -- this ranking is a major problem for the credibility of the paper’s narrative. Being unable to rank against others precisely, especially when you don’t know their skill level, does not demonstrate that someone is unaware of their own lack of skill.
Thinking about all the "INAL" answers and the obviously wrong "legal" advice and opinion on legal topics you can come across on HN on a daily basis, I think law is good example of people overestimating their knowledge.
Replace figure skating with any other sports, so, and try having discussions about, e.g, a defeat of any soccer team. All of a sudden everyone just became a soccer coach. And everyone is able to critique individual player's performance and skill and technique. If anything, this proofs the DK effect rather well.