Three Pillars of Probability in Cosmology

Probability in cosmology encompasses three pillars: the tight clustering of measurements around specific values, the support of measured values for a given model, and the inherent uncertainty of quantum mechanics in the early universe. The deep meaning of probability in physics and cosmology is a subject of debate, with authors and physicists like Sabine Hossenfeldr emphasizing that the lack of understanding of probability is hindering progress in the foundation of physics. Probability is prominently featured in discussions about quantum mechanics and the multiverse, as well as in questioning the nature of observed constants of nature.