If this seems self-evident, it's actually a very unnatural way to think. Without the right training, most minds take the wrong approach. They prefer to solve problems by asking: Which ideas do I already love and know deeply, and how can I apply them to the situation at hand? Psychologists call this the “Availability Heuristic” and its power is well-documented.
You know the old adage, to the man with only a hammer, everything starts looking a bit like a nail. Such narrow-minded thinking feels entirely natural to us, but it leads to far too many misjudgments. You probably do it every single day without knowing.
It's not you don't have some good ideas in your head. You probably do! No competent adult is a total klutz. It's just that we tend to be very limited in our good ideas, and we over-use them. This makes our good ideas just as dangerous as bad ones!
The great investor and teacher Benjamin Graham explained it best:
You can get in way more trouble with a good idea than a bad idea, because you forget that the good idea has limits.
Smart people like Charlie Munger realize that the antidote to this sort of “mental overreaching” is to add more models to your mental palette; to expand your repertoire of ideas, making them vivid and available in the problem-solving process.
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