This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 88-89. The previous thread has passed 500 comments.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically:
You do not need to rot13 anything about HP:MoR or the original Harry Potter series unless you are posting insider information from Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).
If there is evidence for X in MOR and/or canon then it’s fine to post about X without rot13, even if you also have heard privately from Eliezer that X is true. But you should not post that “Eliezer said X is true” unless you use rot13.
Some of the comments on what Harry should do reminded me of something that has yet to, as far as I know, appear in HPMoR: The Room of Requirement (aka "the god room"). In canon, Dumbledore (apparently) didn't even know about it; it was Dobby who revealed it to Harry, and hence the DA; I don't remember there being an explanation for how Draco found it (maybe Dobby knew about it before Order of the Phoenix, and Draco ordered him to tell him about it?). It also had some poorly defined, but clearly restrictive rules, which Neville eventually mastered over the course of Deathly Hallows (if not off screen in the previous books): it can't provide food, it didn't show Harry what Draco was up to based on the way Harry was requesting, there was something about what conditions prevented people from entering that I don't remember in detail, etc. It clearly wasn't much use at conjuring up god-mode equipment for use outside of the room, since Neville didn't use it as an armory for the final battle.
I don't remember this being mentioned among the "not appearing in this fic" elements of canon, though it does strike me as ridiculously overpowered in this Harry's hands. However, canon Riddle used it to hide Ravenclaw's diatem, which suggests that canonmort knew enough about the room that rationalmort would almost definitely have found it and abused it for all it's worth if it exists in HPMoR. (It seems to have a decent supply of books, at least, though I have to doubt it could generate information that wasn't put into it beforehand.)
Thinking about the RoR also reminded me of that two-way vanishing cabinet connecting Hogwarts to Borgan and Berk's, which I'm rather doubtful JKR thought much about before Order of the Phoenix, since at some point since it's creation, enough people will have had to have been put through it to make the connection and exploit the blatant hole in Hogwarts security.