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Is probability a deep probe of how the world works at fundamental levels? Or is probability merely a tool of human perception in trying to discern what is true and what is not true by assigning degrees of uncertainty? What is the difference between probability as an objectivist “relative frequency of occurrence” and as a subjectivist “degree of belief”? We explore the power and ubiquitous presence of probability.

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Sabine Hossenfelder is an author and theoretical physicist who researches quantum gravity. She is a Research Fellow at the Frankfurt Institute for Advanced Studies where she leads the Analog Systems for Gravity Duals group.

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Closer to Truth, hosted by Robert Lawrence Kuhn and directed by Peter Getzels, presents the world’s greatest thinkers exploring humanity’s deepest questions. Discover fundamental issues of existence. Engage new and diverse ways of thinking. Appreciate intense debates. Share your own opinions. Seek your own answers.