I'm actually not sure why they assumed the troll would be a distraction. The 3rd floor corridor is important, but IIRC it's not kept continuously guarded; the troll fiasco won't draw any guards away from their posts. Perhaps the thinking is that the troll might cause the professors to ignore the corridor wards, but I doubt they would be quite that stupid. And, of course, roving bands of professors searching for the troll on high security alert couldn't possibly be good for intruders, even if they're not specifically looking for them. Certainly, attempting a troll "distraction" seems far inferior to drugging Filch and sneaking in at 3AM.
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 90. The previous thread has passed 750 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.
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: