My model of EY says that he would want the evidence he gave us to point to the true culprit--more evidence ought to make finding who did it easier, not harder. If EY chose that time deliberately to point at Quirrell, it's further evidence that Quirrell did it.
More specifically, from my model of EY: If some information, rationally interpreted, is (internal to the story) evidence for a hypothesis, then this is good evidence (external to the story) that EY intends this hypothesis to be true. And if some information, interpreted according to a common bias, is (internal to the story) evidence for a hypothesis, then this is good evidence (external to the story) that EY intends this hypothesis to be false. Not only is he not trying to trick us, after all; he's trying to teach us rationality skills. So he can put in red herrings; we just shouldn't fall for them!
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: