I have to write it somewhere - because what is the point of a belief that does not allow you to make predictions that you are willing to stand by - and I guess this is the place. I believe that Hermione is not dead (duh!), and planned this all for the purposes of getting Harry out of his debt to Malfoy and/or preventing herself from being used as a weapon against Harry. She used or was discovered by Fred and George who were subsequently memory charmed by Dumbledore, who has spent entirely too much time off-camera of late.
Edit: I'll add that - on the odd chance I'm right, and this ends up sounding like bragging - I don't think that makes me particularly clever; I think it speaks to skillful but subtle hinting on the part of the author.
Upvoted for putting your prediction out there like this, even though I very much disagree (for the reason that Qiaochu said, for example).
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 chapters 91 & 92 . 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, 17,18,19,20.
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: