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Most people solve problems by reasoning by analogy. They look at what’s been done before and make small improvements. First principles flip that. You break a problem down to its fundamental truths and then reason up from there, ignoring convention.

54,796 просмотров • 1 год назад •via X (Twitter)

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Elon Musk explains the mental model he uses to learn anything 10x faster: "The normal way we conduct our lives is we reason by analogy. We're doing this because it's like something else that was done, or it's like what other people are doing. 'Me too' type ideas. Slight iterations on a theme." Elon continues: "It's mentally easier to reason by analogy rather than from first principles. But first principles is kind of a physics way of looking at the world. What that really means is you boil things down to the most fundamental truths and say, 'What are we sure is true?' and then reason up from there. That takes a lot more mental energy." He gives the example of batteries: "Somebody could say, and people do, that battery packs are really expensive and that's just the way they'll always be, because that's the way they've been in the past. Well no, that's pretty dumb. If you applied that reasoning to anything new, you'd never get to that new thing." Elon explains how first principles changes the question entirely: "They would say historically it costs $600 per kilowatt hour, so it's not going to be much better than that in the future. First principles would say: What are the material constituents of the batteries? What is the spot market value of those materials? It's got cobalt, nickel, aluminum, carbon, some polymers, and a steel can. If we bought that on the London Metal Exchange, what would it cost? It's like $80 per kilowatt hour. So clearly, you just need to think of clever ways to combine those materials into the shape of a battery cell, and you can have batteries much cheaper than anyone realizes."

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