All episodes of Uncommon Knowledge

Uncommon Knowledge · 2026-01-15 · 57 min · 9,308 words

Why Does 2 + 2 = 4? What Math Teaches Us About Deep Reality | Peter Robinson | Hoover Institution

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2 plus 2 equals 4. In all places and for all time, 2 plus 2 equals 4. But why? What does math tell us about the nature of reality? David Berlinsky, Sergiu Kleinermann, and Stephen Meyer on Uncommon Knowledge now.

Welcome to Uncommon Knowledge, recording today in Salzburg, Austria. I'm Peter Robinson. David Berlinsky has taught math, philosophy, and English at universities including Stanford, Rutgers, the City University of New York, and the Université de Paris. I hope you like that pronunciation, David. Perfect.

He is the author of books including 1, 2, 3, Absolutely Elementary Mathematics, and his forthcoming volume, The Perpetual Rose. A native of Romania, Sergio Kleinermann is a professor of mathematics at Princeton. In his own words, his current interests include the mathematical theory of black holes, more precisely their rigidity and stability, I'm reading these words without having any idea what they mean, and the dynamic formation of trapped surfaces and singularities. I'll ask you to explain a little bit of that maybe, Sergio.

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