The Surgeon General’s Social Media Warning + A.I.’s Existential Risks

The U.S. surgeon general, Dr. Vivek Murthy, says social media poses a “profound risk of harm” to young people. Why do some in the tech industry disagree? Then, Ajeya Cotra, an A.I. researcher, on how A.I. could lead to a doomsday scenario. Plus: Pass the hat. Kevin and Casey play a game they call HatGPT.