Hmm I hadn't thought the rock was the stone. That would be a great twist, but I doubt it because Dumbeldore said it was not magical to his knowledge when Harry asked him.
Also even if it is the stone, I don't think QQ knows this.
Also, we have what seems like a sufficient explanation for the rock - assuming Albus knew that the Defense Professor mentioned trolls while he was subtly encouraging Harry to learn the Killing Curse.
New chapter!
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 102.
There is 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.)
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: