I think Dumbledore's been suggested, but I have no idea and I'm pretty sure there isn't conclusive evidence anywhere.
Hm. Minerva wouldn't do it. If Snape would, the Weasleys wouldn't know that.
Dumbledore at least knows it was the Weasleys, so I count that as weak evidence towards him...
Quirrel was probably not involved. His extra strong reaction to Harry mentioning that the newpaper spoke of a prophecy suggests he was not pretending ignorance during that whole conversation, since that reaction probably came from Voldemort, not from the Quirrel-role.
But I don't know that it even had to be someone of that power level, or for that matter a Hogwarts teacher.
It's also curious why Quirrel only deduced that it was the Weasleys after he figured out the method used. What's so Weasley-like about reverse memory-charming?
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 113.
There is 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.)
IMPORTANT -- From the end of chapter 113: