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Learn about the historical significance and modern relevance of Dr. Ignaz Semmelweis's groundbreaking work in a video that explores his 1847 discovery linking hand washing to reduced mortality rates in medical settings. Examine how his implementation of chlorinated lime hand washing protocols at Vienna General Hospital led to a dramatic 90% reduction in maternal deaths, despite facing ridicule and rejection from the medical establishment. Delve into the concept of the "Semmelweis Reflex" - the psychological phenomenon of rejecting new ideas despite strong supporting evidence - and discover practical strategies to overcome this barrier to innovation. Explore critical thinking concepts including confirmation bias, authority bias, belief perseverance, and the differences between System 1 and System 2 thinking while reflecting on how these psychological patterns continue to impact scientific progress and truth-seeking today.