

Steven Pinker on Speculation Bubbles, Super Bowl Ads, and What Leaders Need to Know About Group Psychology
79 snips Sep 23, 2025
In this discussion, Steven Pinker, a Harvard psychology professor and author known for his insights on language and cognition, delves into the concept of common knowledge. He examines how this phenomenon influences markets, including meme stocks and crypto bubbles. Pinker explains the importance of shared awareness in successful Super Bowl ads and how misperceptions can lead to group dynamics like panic buying. He highlights the power of knowledge in negotiation and the impact of media fragmentation on polarization. A fascinating exploration of psychology in everyday life!
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What Common Knowledge Really Is
- Common knowledge means not just shared facts but knowing that others know them, recursively.
- That recursive awareness enables coordination on arbitrary conventions like driving side or meeting times.
Emperor's New Clothes Example
- Pinker opens with The Emperor's New Clothes to show how a public utterance can change everyone's knowledge state.
- The boy's outburst turned private knowledge into common knowledge and collapsed the pretense.
How Expectations Create Bubbles
- Keynesian beauty contests model speculative markets where people bet on others' beliefs rather than fundamentals.
- Bubbles and the 'greater fool' dynamics arise from layered expectations about future buyers.