In this conversation, Professor Barry Loewer discusses laws of nature, probability, and the Mentaculus. He explains the distinction between objective and subjective probability, examines the concept of chance, and engages with the work of David Lewis, and considers why the world exhibits patterns, introducing the Humean mosaic.He outlines the Mentaculus and its origins, and explains entropy and the past hypothesis in relation to the arrow of time and the emergence of structure. He also addresses determinism, free will, and counterfactuals, and we end the episode with a discussion of travel, cultural experience, and physical disciplines such as Brazilian Jiu-Jitsu, wrestling, and table tennis.