Everyone loves Harry Potter but sometimes you think the decisions that Harry makes are weird and irrational. There’s where Harry Potter and the methods of rationality comes in. This is a Harry Potter Fanfiction written by author Eliezer Yudkowsky. In this alternate universe, Harry’s Aunt Petunia marries an Oxford University Professor Micheal Verres instead of Vernon Dursley. When Harry’s parents are killed by the Dark Lord, Harry is raised lovingly by his relatives. He learns about the scientific method when young and applies rationality to everything that he does doing experiments and thinking logically about events.