Harry Potter and the Methods of Rationality (HPMOR) is a Harry Potter fan fiction by Eliezer Yudkowsky, published on FanFiction.Net. It adapts the story of Harry Potter to explain complex concepts in cognitive science, philosophy, and the scientific method. Yudkowsky published HPMOR as a serial from February 28, 2010 to March 14, 2015, totaling 122 chapters and about 660,000 words. Yudkowsky wrote HPMOR to promote rationality skills he advocates on his community blog LessWrong. His reimagining supposes that Harry's aunt Petunia Evans married an Oxford professor and homeschooled Harry in science and rational thinking. As such, Harry "enters the wizarding world armed with Enlightenment ideals and the experimental spirit." The fan fiction spans one year, covering Harry's first year in Hogwarts. HPMOR has inspired other works of fan fiction, art, and poetry. More information...
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