I'm going to assume that IQ does measure general intelligence, since it is highly correlated with all sorts of positive life outcomes that seem to be associated

I'm going to assume that IQ does measure general intelligence, since it is highly correlated with all sorts of positive life outcomes that seem to be associated with general intelligence. Given this, I'm more inclined to draw the conclusion that rationality is not central to intelligence. Most real life problems don't reduce to a logically complex puzzle. As my kung fu teacher once said "fighting isn't like a game of chess". In general, real life problems involve a mix of hard logical constraints, and soft constraints that cannot be reasoned about, but rather rely on intuition.