HPMOR.com is an authorized, ad-free mirror of Eliezer Yudkowsky ‘s epic Harry Potter fanfic, Harry Potter and the Methods of Rationality (originally under the pen name Less Wrong).

Disclaimer: J. K. Rowling owns Harry Potter, and no one owns the methods of rationality. This fic is widely considered to have really hit its stride starting at around Chapter 5.

Rationality: From AI to Zombies, a compendium of my blog post sequences on Less Wrong as slightly edited and much reorganized by Robby Bensinger, is now available as a pay-what-you …

My pen name derives from the website Less Wrong, a collaborative blog devoted to improving the art of human rationality. If you want to know everything Harry James Potter-Evans-Verres …

One of his tutors had used Socratic teaching a lot. It had been annoying but effective. Then there was the Potter Method, which was insane. To be fair, Draco had to admit that Harry Potter had …

There comes a point in every plot where the victim starts to suspect; and looks back, and sees a trail of events all pointing in a single direction. And when that point comes, Father had …

The March of Reason would just have to start over, that was all; they still had the experimental method and that was the important thing. "How do I get to Hogwarts, then?"

Disclaimer: J. K. Rowling is watching you from where she waits, eternally in the void between worlds. A/N: As others have noted, the novels seem inconsistent in the apparent purchasing …

Thursday. If you wanted to be specific, 3:32pm on Thursday afternoon. Harry and all the other boys in the first year were outside on a grassy field with Madam Hooch, standing next to the …

For the second time that day, Harry's eyes filled with tears. Heedless of the puzzled eyes of the Ravenclaws in the common room, he reached out to the silver creature which Draco Malfoy …