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Science of Perception Box

Science of Perception Box

The Hidden Rules Holding Society Together: Steven Pinker on Common Knowledge

Sep 9, 2026 · 44m

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Why do we speak in euphemisms instead of saying exactly what we mean? Dr. Heather Berlin and Dr. Christoph Koch sat down with cognitive scientist and bestselling author Steven Pinker to explore common knowledge — not what everyone knows, but what everyone knows that everyone knows. Get it? Common knowledge is an awareness of something that is public or “out there” and it has an enormous impact on our social, political, and economic lives. From unspoken rules of flirtation to the fall of the Berlin Wall, Pinker reveals how the social force of common knowledge shapes everything from our most intimate relationships to global financial markets. His work illuminates central ideas of the…