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Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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.
For all those wandering WHY wizards don't use their powers to get money from the Muggle economy...
Canon!Lucius does, according to Rowling (from her website Pottermore):
" The Malfoy name comes from old French and translates as 'bad faith'. Like many other progenitors of noble English families, the wizard Armand Malfoy arrived in Britain with William the Conqueror as part of the invading Norman army. Having rendered unknown, shady (and almost certainly magical) services to King William I, Malfoy was given a prime piece of land in Wiltshire, seized from local landowners, upon which his descendants have lived for ten consecutive centuries.
Their wily ancestor Armand encapsulated many of the qualities that have distinguished the Malfoy family to the present day. The Malfoys have always had the reputation, hinted at by their not altogether complimentary surname, of being a slippery bunch, to be found courting power and riches wherever they might be found. In spite of their espousal of pure-blood values and their undoubtedly genuine belief in wizards' superiority over Muggles, the Malfoys have never been above ingratiating themselves with the non-magical community when it suits them. The result is that they are one of the richest wizarding families in Britain, and [b]it has been rumoured for many years (though never proven) that over the centuries the family has dabbled successfully in Muggle currency and assets. Over hundreds of years, they have managed to add to their lands in Wiltshire by annexing those of neighbouring Muggles, and the favour they curried with royalty added Muggle treasures and works of art to an ever-expanding collection. "