This post highlights the groundbreaking work of a doctor who personally induced an ulcer to demonstrate the role of Helicobacter pylori, a bacterium he proposed as a cause of gastric ulcers, contrary to the then-accepted belief that stress was the primary culprit. The discussion among commenters reflects a mix of academic background knowledge and the significance of practical science in overturning longstanding medical assumptions. The legacy of this research continues to influence the field of gastroenterology and highlights the importance of questioning established norms in scientific inquiry.