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 81, which should be published later today. The previous thread passed 400 comments as of the time of this writing, so it will pass 500 comments soon after the next chapter is posted, if not before. I suggest refraining from commenting here until chapter 81 is posted; comment in the 12th thread until you read chapter 81. After chapter 81 is posted, I suggest all discussion of previous guesses be kept here, with links to comments in the previous thread.
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.) When posted, chapter 81 should appear here.
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: one, two, three, four, five, six, seven, eight,nine, ten, eleven, twelve.
As a reminder, it’s often useful to start your comment by indicating which chapter you are commenting on.
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Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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.
Good bit, though a bit of a hodgepodge. I presume the real culprit will be found, but that doesn't necessarily counter the debt - the Wizengamot would have to agree, and the truth could be found out in a way that leaves little actual proof, even aside issues of Wizengamot's fairness. I'll be disappointed if paying the debt turns out to be too arduous though, but of course depending on the methods chosen there may be side effects. (One way would be for Draco to accept a counterdebt, having been convinced of the truth of the matter and seeing that being on good terms with Harry is still of value. Assuming Draco will return, which is sadly not a given.)
Merely spooking the Dementor was a good twist on the common (mine included) anticipation of it ending up destroyed. The telling of the incident was cleverly arranged not to give out too much new information on how they actually work. Harry's theory of them operating on the expectations of others works as an explanation; as the animal Patronuses imperfectly shield the Wizengamot from the Dementor, thus they shield the Dementor from their expectations, leaving Harry's dominant. (Also, one might argue that the Dementor shirking from Harry was wholly unexpected to almost everyone present, thus they didn't really have sufficiently direct active expectations on that particular thing either way. But this is an unnecessary side hypothesis.) The Dementor may as well still have also some internal intelligence and self preservation instincts though, as has been hypothesised especially on the grounds of them all refusing co-operation with the Azkaban guards earlier.
In any case, now the expectations of many will actually support Dementors fleeing from Harry, which might come in handy if they at least partially work off of those ;)