It's possible that H&C never did figure out an effective lever. In that case, he might have given up on Memory Charming her (requires the target's defenses to be lowered, at least in the case of an experienced Auror and possibly for a very pissed off first year) and just oblivated her. If he'd managed to memory charm her, I don't think she'd have been so freaked out. She also wouldn't have 'lost track of time', she'd have had a perfectly reasonable legitimate excuse put in place.
Also, have we seen Quirrell use Legilimancy at all? If we have, that's an argument for H&C not being Quirrell, because if you've thoroughly read someone's mind you it shouldn't take that many tries for a groundhog day attack.
(The HPMOR discussion thread after this one is here.)
This is a new thread to discuss Eliezer Yudkowsky's Harry Potter and the Methods of Rationality and anything related to it. There haven't been any chapters recently, but it looks like there are a bunch in the pipeline and the old thread is nearing 700 comments. The latest chapter as of 7th March 2012 is Ch. 77.
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.
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.
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: