This episode explores how a doctor's cognitive state, rather than solely a patient's physical condition, dramatically influences medical decisions and outcomes in the emergency room. It introduces the concept of "rational inattention," explaining that when physicians face high cognitive loads, they tend to substitute internal "thinking" with ordering more external diagnostic tests ("doing"). Listeners will learn how groundbreaking research challenges the perception of objective medical care and redefines the role of a physician's attention in high-stakes environments.