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.
[]

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.
[]

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
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 phenonemon 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.
[]

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. 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.
[]

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

[]
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.

[]
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.

[]
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.

[]
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, and Jessica Livingston for reading drafts of this.