I still can't figure out whether you're excluding the Imperius.
Miss Granger would remember the Imperius. Obliviation cannot be detected by any known means, but only a Professor could have cast that spell upon a student without alarm from the Hogwarts wards
'She was Imperiused and then Obliviated' looks like the likeliest hypothesis right now.
'She was Imperiused and then Obliviated' looks like the likeliest hypothesis right now.
I think the idea is that with just an Imperius and an Obliviation, she wouldn't remember herself deciding to cast the Blood-Chilling charm -- she might remember doing it, but not remember deciding to do it, which would be difference enough to be noted by the Veritaserum and/or Legimancer.
So you'd need the False-Memory-Charm on top of that, and once you have the False-Memory-Charm you don't actually need to complicate this further with an Imperius and Obliviation, it suffices by itself.
The new thread, discussion 13, is here.
This is a new thread to discuss Eliezer Yudkowsky's Harry Potter and the Methods of Rationality and anything related to it. With three chapters recently the previous thread has very quickly reached 1000 comments. The latest chapter as of 25th March 2012 is Ch 80.
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: one, two, three, four, five, six, seven, eight, nine, ten, eleven.
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: