IIRC, it's got details he wasn't told that have been confirmed, which means that it's not an internally-generated false memory.
My memory may be in error on this point, but I did consider your hypothesis and explicitly reject it.
Perhaps one of the at-least-two people who downvoted me would like to tell me what these details are that make it impossible for the memory to have been internally generated.
So far, all I can come up with is this: on the basis of Voldemort's mild reluctance to kill his mother in this memory, Harry deduced (via a rather tenuous chain of reasoning) that Dumbledore told Snape about the prophecy, and when he confronted McGonagall with this she behaved in a manner consistent with what he deduced. This doesn't seem all that conclusive to me. What am I missing?
The new discussion thread (part 15) is here.
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 82. The previous thread passed 1000 comments as of the time of this writing, and so has long passed 500. Comment in the 13th thread until you read chapter 82.
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.
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: