Anyone got any other examples of things just about everyone here has seen the folly of, even though they’re widespread among otherwise-smart people?
Belief in Democracy.
Belief in AGW (Anthropic causes as the main driver of Global Warming)
Echoing mattnewport , these may require specific knowledge to recognize their irrationality.
I was in Mensa years ago—most members I met were under-achieving smart people.
Current theme: default
Less Wrong (text)
Less Wrong (link)
Belief in Democracy.
Belief in AGW (Anthropic causes as the main driver of Global Warming)
Echoing mattnewport , these may require specific knowledge to recognize their irrationality.