Betting isn't my thing. I know it's popular among many here, but I'm just on the forums to discuss HPMOR with other fans.
There are other possibilities, like Harry is seeing what he desires, but I have to propose some pretty awkward complications to make that work. I think Izeinwinter is very likely correct.
When Harry first entered the room wearing his cloak, he looked into the mirror and saw only the reflection. Now he is again looking into the mirror while cloaked.
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 109.
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: