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. https://stevenpinker.com/publications/when-everyone-knows-everyone-knows-common-knowledge-and-mysteries-money-power-and Maher: What's the phrase of the book when everyone knows that everyone knows? Okay, so explain what that means. Me: Yes, so when everyone knows that everyone knows. When I kn

On the "greater fool" strategy and common knowledge. More on this in my new book: When Everyone Knows That Everyone Knows . . . Common Knowledge and the Mysteries of Money, Power, and Everyday Life: https://bit.ly/3FgucEQ "In ordinary investing, you buy a share of a company because the company sells something at a profit, and you hope to take a share of that profit. In speculative investing, you buy it not because of the profit of the company, but because you hope that you can unload the shares

What Is Common Knowledge? | Definition & Examples