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							- May 2021There's one kind of opinion I'd be very afraid to express publicly.
 
- If someone I knew to be both a domain expert and a reasonable person
 
- proposed an idea that sounded preposterous, I'd be very reluctant
 
- to say "That will never work."Anyone who has studied the history of ideas, and especially the
 
- history of science, knows that's how big things start. Someone
 
- proposes an idea that sounds crazy, most people dismiss it, then
 
- it gradually takes over the world.Most implausible-sounding ideas are in fact bad and could be safely
 
- dismissed. But not when they're proposed by reasonable domain
 
- experts. If the person proposing the idea is reasonable, then they
 
- know how implausible it sounds. And yet they're proposing it anyway.
 
- That suggests they know something you don't. And if they have deep
 
- domain expertise, that's probably the source of it.
 
- [1]Such ideas are not merely unsafe to dismiss, but disproportionately
 
- likely to be interesting. When the average person proposes an
 
- implausible-sounding idea, its implausibility is evidence of their
 
- incompetence. But when a reasonable domain expert does it, the
 
- situation is reversed. There's something like an efficient market
 
- here: on average the ideas that seem craziest will, if correct,
 
- have the biggest effect. So if you can eliminate the theory that
 
- the person proposing an implausible-sounding idea is incompetent,
 
- its implausibility switches from evidence that it's boring to
 
- evidence that it's exciting.
 
- [2]Such ideas are not guaranteed to work. But they don't have to be.
 
- They just have to be sufficiently good bets — to have sufficiently
 
- high expected value. And I think on average they do. I think if you
 
- bet on the entire set of implausible-sounding ideas proposed by
 
- reasonable domain experts, you'd end up net ahead.The reason is that everyone is too conservative. The word "paradigm"
 
- is overused, but this is a case where it's warranted. Everyone is
 
- too much in the grip of the current paradigm. Even the people who
 
- have the new ideas undervalue them initially. Which means that
 
- before they reach the stage of proposing them publicly, they've
 
- already subjected them to an excessively strict filter.
 
- [3]The wise response to such an idea is not to make statements, but
 
- to ask questions, because there's a real mystery here. Why has this
 
- smart and reasonable person proposed an idea that seems so wrong?
 
- Are they mistaken, or are you? One of you has to be. If you're the
 
- one who's mistaken, that would be good to know, because it means
 
- there's a hole in your model of the world. But even if they're
 
- mistaken, it should be interesting to learn why. A trap that an
 
- expert falls into is one you have to worry about too.This all seems pretty obvious. And yet there are clearly a lot of
 
- people who don't share my fear of dismissing new ideas. Why do they
 
- do it? Why risk looking like a jerk now and a fool later, instead
 
- of just reserving judgement?One reason they do it is envy. If you propose a radical new idea
 
- and it succeeds, your reputation (and perhaps also your wealth)
 
- will increase proportionally. Some people would be envious if that
 
- happened, and this potential envy propagates back into a conviction
 
- that you must be wrong.Another reason people dismiss new ideas is that it's an easy way
 
- to seem sophisticated. When a new idea first emerges, it usually
 
- seems pretty feeble. It's a mere hatchling. Received wisdom is a
 
- full-grown eagle by comparison. So it's easy to launch a devastating
 
- attack on a new idea, and anyone who does will seem clever to those
 
- who don't understand this asymmetry.This phenomenon is exacerbated by the difference between how those
 
- working on new ideas and those attacking them are rewarded. The
 
- rewards for working on new ideas are weighted by the value of the
 
- outcome. So it's worth working on something that only has a 10%
 
- chance of succeeding if it would make things more than 10x better.
 
- Whereas the rewards for attacking new ideas are roughly constant;
 
- such attacks seem roughly equally clever regardless of the target.People will also attack new ideas when they have a vested interest
 
- in the old ones. It's not surprising, for example, that some of
 
- Darwin's harshest critics were churchmen. People build whole careers
 
- on some ideas. When someone claims they're false or obsolete, they
 
- feel threatened.The lowest form of dismissal is mere factionalism: to automatically
 
- dismiss any idea associated with the opposing faction. The lowest
 
- form of all is to dismiss an idea because of who proposed it.But the main thing that leads reasonable people to dismiss new ideas
 
- is the same thing that holds people back from proposing them: the
 
- sheer pervasiveness of the current paradigm. It doesn't just affect
 
- the way we think; it is the Lego blocks we build thoughts out of.
 
- Popping out of the current paradigm is something only a few people
 
- can do. And even they usually have to suppress their intuitions at
 
- first, like a pilot flying through cloud who has to trust his
 
- instruments over his sense of balance.
 
- [4]Paradigms don't just define our present thinking. They also vacuum
 
- up the trail of crumbs that led to them, making our standards for
 
- new ideas impossibly high. The current paradigm seems so perfect
 
- to us, its offspring, that we imagine it must have been accepted
 
- completely as soon as it was discovered — that whatever the church thought
 
- of the heliocentric model, astronomers must have been convinced as
 
- soon as Copernicus proposed it. Far, in fact, from it. Copernicus
 
- published the heliocentric model in 1532, but it wasn't till the
 
- mid seventeenth century that the balance of scientific opinion
 
- shifted in its favor.
 
- [5]Few understand how feeble new ideas look when they first appear.
 
- So if you want to have new ideas yourself, one of the most valuable
 
- things you can do is to learn what they look like when they're born.
 
- Read about how new ideas happened, and try to get yourself into the
 
- heads of people at the time. How did things look to them, when the
 
- new idea was only half-finished, and even the person who had it was
 
- only half-convinced it was right?But you don't have to stop at history. You can observe big new ideas
 
- being born all around you right now. Just look for a reasonable
 
- domain expert proposing something that sounds wrong.If you're nice, as well as wise, you won't merely resist attacking
 
- such people, but encourage them. Having new ideas is a lonely
 
- business. Only those who've tried it know how lonely. These people
 
- need your help. And if you help them, you'll probably learn something
 
- in the process.Notes[1]
 
- This domain expertise could be in another field. Indeed,
 
- such crossovers tend to be particularly promising.[2]
 
- I'm not claiming this principle extends much beyond math,
 
- engineering, and the hard sciences. In politics, for example,
 
- crazy-sounding ideas generally are as bad as they sound. Though
 
- arguably this is not an exception, because the people who propose
 
- them are not in fact domain experts; politicians are domain experts
 
- in political tactics, like how to get elected and how to get
 
- legislation passed, but not in the world that policy acts upon.
 
- Perhaps no one could be.[3]
 
- This sense of "paradigm" was defined by Thomas Kuhn in his
 
- Structure of Scientific Revolutions, but I also recommend his
 
- Copernican Revolution, where you can see him at work developing the
 
- idea.[4]
 
- This is one reason people with a touch of Asperger's may have
 
- an advantage in discovering new ideas. They're always flying on
 
- instruments.[5]
 
- Hall, Rupert. From Galileo to Newton. Collins, 1963. This
 
- book is particularly good at getting into contemporaries' heads.Thanks to Trevor Blackwell, Patrick Collison, Suhail Doshi, Daniel
 
- Gackle, Jessica Livingston, and Robert Morris for reading drafts of this.
 
 
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