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Into the Impossible With Brian Keating

Steven Pinker on Cancel Culture, Common Knowledge & AI - #518

Into the Impossible With Brian Keating

Brian Keating

Physics, Natural Sciences, Science

4.71.1K Ratings

🗓️ 24 September 2025

⏱️ 51 minutes

🧾️ Download transcript

Summary

Get 3 months off the annual plan and start learning faster at shortform.com/impossible In this episode, Steven Pinker unpacks how common knowledge shapes everything from why rational people can’t agree to disagree to why markets boom and bust. We explore the risks of falsifying expert claims, the power of social norms, and whether civilization is held together by truths—or by the fictions we all agree to share. — Key Takeaways:  00:00 Intro  00:58 When common knowledge is wrong 02:37 The role of common knowledge in social coordination  08:48 Free will and determinism  14:48 Judging a book by its cover 21:08 Government suppression and common knowledge 30:08 The agree to disagree theorem  34:54 Generosity and charity in human affairs 41:12 The role of common knowledge in religious beliefs  48:31 LLMs and common knowledge  50:39 Outro Additional resources:  📚 When Everyone Knows That Everyone Knows… by Steven Pinker: ⁠https://a.co/d/bKJzohi⁠  ➡️ Follow me on your fav platforms: ✖️ Twitter:⁠ ⁠⁠https://twitter.com/DrBrianKeating⁠  🔔 YouTube:⁠ https://www.youtube.com/DrBrianKeating?sub_confirmation=1⁠  📝 Join my mailing list:⁠ ⁠⁠https://briankeating.com/list⁠  ✍️ Check out my blog:⁠ ⁠⁠https://briankeating.com/cosmic-musings/⁠  🎙️ Follow my podcast:⁠ ⁠⁠https://briankeating.com/podcast⁠  — Into the Impossible with Brian Keating is a podcast dedicated to all those who want to explore the universe within and beyond the known. Make sure to follow/subscribe so you never miss an episode! Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

Stephen Pinker just told me something that honestly blew my mind.

0:03.0

He said that Malcolm Gladwell's recent cancellation attempt was not only predictable.

0:07.0

It was mathematically inevitable.

0:09.0

There is better thing as a social media shaining mob.

0:11.0

Why do people feel the urge to pile on and collectively punish someone who says something that seems to violate some moral norm?

0:19.0

And here's the kicker. Pinker started coming years ago using something called common knowledge theory. Common knowledge means I know something. You know it. I know that you know it. You know that I know that I know that you know it at infinitum. Picture this. You're in a meeting where everyone privately thinks the boss's idea is stupid, but nobody speaks up.

0:42.6

Then one person finally says what everybody's thinking, and suddenly the whole room erupts in agreement.

0:43.5

What just happened?

0:49.7

According to Stephen Pinker, you just participated in one of the most powerful forces shaping human civilization.

0:53.8

And today we dive deep into it with one of the foremost public intellectuals of our time.

0:54.6

Let's go. Professor Stephen Pinker, welcome back of the foremost public intellectuals of our time. Let's go.

0:57.4

Professor Stephen Pinker, welcome back to the Into the Impossible podcast.

0:58.4

Thank you.

1:02.5

In this book, you've written that civilization itself depends on common knowledge.

1:07.2

But my first question to you is what happens when that common knowledge is wrong or even when technologies like artificial intelligence threaten us by hallucination, what happens to the

1:12.3

very foundations of what we thought was secure? The answer is we don't know. Track record in general

1:17.1

of protecting the downstream consequences of technology are poor. Even the best super forecasters

1:24.7

are at chance for cut and dry questions five years out, let alone open-ended

1:30.1

questions like what will happen to society, let alone civilization.

1:34.2

I don't know if when social media were introduced 15 years ago, if people could have predicted

1:40.8

social media shaming mobs, the spread of disinformation, the encouragement

1:47.5

of conspiracy theories.

...

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