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Why did Biden’s debate flop change everything? Not because people suddenly noticed his age, but because now “everyone knew that everyone else knew that everyone else knew. ” @SAPinker tells @Coldxman: that’s the power of common knowledge.

Conversations with Coleman

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68,738 次观看 • 9 个月前 •via X (Twitter)

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Dictators fear common knowledge. @SAPinker tells @Coldxman that censorship and bans on public assembly exist for one reason: to stop people from realizing that everyone else feels the same way.

Dictators fear common knowledge. @SAPinker tells @Coldxman that censorship and bans on public assembly exist for one reason: to stop people from realizing that everyone else feels the same way.

Conversations with Coleman

27,038 次观看 • 9 个月前

I'll be giving talks on common knowledge in Australia and New Zealand in February 2026. Tickets : "I begin the book with the story of The Emperor’s New Clothes because it’s the quintessential illustration of common knowledge. When the boy said the Emperor was naked, he wasn’t telling anyone anything they didn’t already know. They could see the Emperor was naked, but he changed the state of their knowledge nonetheless because, by blurting it out within earshot of everyone, now everyone knew that everyone else knew that everyone else knew that everyone else knew that the Emperor was naked. So it shows, first of all, that even though the concept of common knowledge, as I defined it, seems impossible—your head starts to spin after, you know, one or two “I know that she knows,” let alone an infinite number. But what the story shows is that a conspicuous, public, self-evident event—something that you see while you see everyone else seeing it, or you hear when you know everyone else can hear it—can give you common knowledge at a stroke. And the other moral is that it changed the relationship of the people to the Emperor, from obsequious deference to ridicule and scorn. And a major theme of the book is that common knowledge, even though it sounds like this abstruse, recondite academic concept, actually figures into everyday life, figures into our money, and figures into our politics, because it enables coordination and it changes social relationships." Thinkable -- When Everyone Knows That Everyone Knows . . .: Common Knowledge and the Mysteries of Money, Power, and Everyday Life

I'll be giving talks on common knowledge in Australia and New Zealand in February 2026. Tickets : "I begin the book with the story of The Emperor’s New Clothes because it’s the quintessential illustration of common knowledge. When the boy said the Emperor was naked, he wasn’t telling anyone anything they didn’t already know. They could see the Emperor was naked, but he changed the state of their knowledge nonetheless because, by blurting it out within earshot of everyone, now everyone knew that everyone else knew that everyone else knew that everyone else knew that the Emperor was naked. So it shows, first of all, that even though the concept of common knowledge, as I defined it, seems impossible—your head starts to spin after, you know, one or two “I know that she knows,” let alone an infinite number. But what the story shows is that a conspicuous, public, self-evident event—something that you see while you see everyone else seeing it, or you hear when you know everyone else can hear it—can give you common knowledge at a stroke. And the other moral is that it changed the relationship of the people to the Emperor, from obsequious deference to ridicule and scorn. And a major theme of the book is that common knowledge, even though it sounds like this abstruse, recondite academic concept, actually figures into everyday life, figures into our money, and figures into our politics, because it enables coordination and it changes social relationships." Thinkable -- When Everyone Knows That Everyone Knows . . .: Common Knowledge and the Mysteries of Money, Power, and Everyday Life

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Discussing common knowledge with Bill Maher. Common knowledge is the topic of my new book: When Everyone Knows That Everyone Knows...: Common Knowledge and the Mysteries of Money, Power, and Everyday Life.

Discussing common knowledge with Bill Maher. Common knowledge is the topic of my new book: When Everyone Knows That Everyone Knows...: Common Knowledge and the Mysteries of Money, Power, and Everyday Life.

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On Friday, Bill Maher asked me if what happened with Biden at the disastrous debate with Trump was the same story as the Emperor's New Clothes. Me: The story of the Emperor's New Clothes is a story about common knowledge, because when the kid blurted it out, he actually wasn't telling anyone anything they didn't already know. They could see the Emperor was naked. But he still changed their knowledge, because by blurting it out with an earshot of the others, now everyone knew that everyone else knew that everyone else knew that everyone else knew. And what that allowed them to do is change their relationship with the Emperor, from obsequious deference to ridicule and scorn. And the thing about common knowledge in the social realm is that it's what props up our social relationships. And so when something is blurted out, then it can change everything. It changes the nature of your relationship with someone. Maher: And we do have sort of a modern version of the Emperor parable, which is Joe Biden. I mean, he was the Emperor who everyone wouldn't say had lost his marbles. I mean, is that not really the same story? Me: It is the same story, because opinion polls showed that after that disastrous debate with Trump, the number of people who thought that he was cognitively impaired didn't go up by that much. It went up by a few percentage points. But before, a majority of people thought that he was cognitively impaired. The difference is, when it's on TV, where you're watching it, you know that the rest of the country is watching it, you know the rest of the country knows the rest of the country, it's no longer private. It's common. And that's when he was challenged. That was the end. Bill Maher Real Time with Bill Maher

On Friday, Bill Maher asked me if what happened with Biden at the disastrous debate with Trump was the same story as the Emperor's New Clothes. Me: The story of the Emperor's New Clothes is a story about common knowledge, because when the kid blurted it out, he actually wasn't telling anyone anything they didn't already know. They could see the Emperor was naked. But he still changed their knowledge, because by blurting it out with an earshot of the others, now everyone knew that everyone else knew that everyone else knew that everyone else knew. And what that allowed them to do is change their relationship with the Emperor, from obsequious deference to ridicule and scorn. And the thing about common knowledge in the social realm is that it's what props up our social relationships. And so when something is blurted out, then it can change everything. It changes the nature of your relationship with someone. Maher: And we do have sort of a modern version of the Emperor parable, which is Joe Biden. I mean, he was the Emperor who everyone wouldn't say had lost his marbles. I mean, is that not really the same story? Me: It is the same story, because opinion polls showed that after that disastrous debate with Trump, the number of people who thought that he was cognitively impaired didn't go up by that much. It went up by a few percentage points. But before, a majority of people thought that he was cognitively impaired. The difference is, when it's on TV, where you're watching it, you know that the rest of the country is watching it, you know the rest of the country knows the rest of the country, it's no longer private. It's common. And that's when he was challenged. That was the end. Bill Maher Real Time with Bill Maher

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I did not report because I knew everyone would blame me -- Collins

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On laughter generating common knowledge: "Laughter is--like eye contact, like direct speech--generates common knowledge. When you're laughing, you know it, because your breathing is interrupted. People around you know it, because they can hear the laughter. It interrupts your speech, and so people who are listening to you know that you're laughing, and you know that you're laughing. So it's generally common knowledge of something. What is that common knowledge? It's generally common knowledge of some infirmity, indignity, embarrassment, cause for humility. And the laughter makes that private knowledge of an infirmity common knowledge. There's something that we all knew compromised that person's dignity, stature. Now, we are all acknowledging it commonly, which means that that person's stature has gone down." Clip on laughter and common knowledge, the topic of my new book, from an interview with Robert Contofalsky (Robert Contofalsky) of R-Academy. -- When Everyone Knows That Everyone Knows . . .: Common Knowledge and the Mysteries of Money, Power, and Everyday Life:

On laughter generating common knowledge: "Laughter is--like eye contact, like direct speech--generates common knowledge. When you're laughing, you know it, because your breathing is interrupted. People around you know it, because they can hear the laughter. It interrupts your speech, and so people who are listening to you know that you're laughing, and you know that you're laughing. So it's generally common knowledge of something. What is that common knowledge? It's generally common knowledge of some infirmity, indignity, embarrassment, cause for humility. And the laughter makes that private knowledge of an infirmity common knowledge. There's something that we all knew compromised that person's dignity, stature. Now, we are all acknowledging it commonly, which means that that person's stature has gone down." Clip on laughter and common knowledge, the topic of my new book, from an interview with Robert Contofalsky (Robert Contofalsky) of R-Academy. -- When Everyone Knows That Everyone Knows . . .: Common Knowledge and the Mysteries of Money, Power, and Everyday Life:

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I recount a joke from the old Soviet Union: a man handing out leaflets in Red Square. Of course, the KGB arrested him and bring him back to headquarters. Only they discover the leaflets are blank sheets of paper. They confront him: "What is the meaning of this?" He says, “What’s there to say? It’s so obvious.” So the point of the joke was, he was generating subversive common knowledge. That is, the citizens of the Soviet Union, they all knew that the regime was inefficient and cruel and oppressive, but each one may have thought that they were the only one, that everyone else was happy. Or they may even have thought that everyone else was aggrieved the way they are, but they didn’t know that everyone else was. And so everyone just kept their misery to themselves. By just making it public, making it common knowledge that there’s a reason to oppose the regime, that can unite people in opposition and can really bring down a regime. Thinkable

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