We tend to assume that wisdom accumulates naturally with experience. Time passes, mistakes are made, lessons are learned, and judgment improves. This belief is deeply reassuring. It suggests that simply living long enough will refine our understanding of the world. Yet evidence from psychology and behavioural science suggests that experience alone is a poor teacher. In many domains, repeated exposure does not sharpen judgment – rather, it dulls it. People who make the same decisions over an...
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