And he will also suffer from the psychological defect caught by the proverb “To a man with a hammer, every problem looks like a nail.” The fifth help… - Charlie Munger

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And he will also suffer from the psychological defect caught by the proverb “To a man with a hammer, every problem looks like a nail.” The fifth helpful notion is that really big effects, lollapalooza effects, will often come only from large combinations of factors.