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Harry Potter and the Methods of Rationality
Fan fiction by Eliezer Yudkowsky
Harry Potter and the Methods of Rationality
Harry Potter and the Methods of Rationality (HPMOR) is a work of Harry Potter fan fiction by Eliezer Yudkowsky published on FanFiction.Net as a serial from 28 February 2010, to 14 March 2015, totaling 122 chapters and over 660,000 words. It adapts the story of Harry Potter to explain complex concepts in cognitive science, philosophy, and the scientific method. Yudkowsky's reimagining supposes that Harry's aunt Petunia Evans married an Oxford professor and homeschooled Harry in science and rational thinking, allowing Harry to enter the magical world with ideals from the Age of Enlightenment and an experimental spirit. The fan fiction spans one year, covering Harry's first year at Hogwarts. HPMOR has inspired other works of fan fiction, art, and poetry, is connected to the contemporary rationalist community, and is popular among rationalists and effective altruists.
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