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 96. The previous thread is at almost 300 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, 20, 21, 22, 23, 24, .
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:
You do not need to rot13 anything about HP:MoR or the original Harry Potter series unless you are posting insider information from Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).
If there is evidence for X in MOR and/or canon then it’s fine to post about X without rot13, even if you also have heard privately from Eliezer that X is true. But you should not post that “Eliezer said X is true” unless you use rot13.
I don't really have very much respect for the plots, or really the cunning, that go on in Rowling's books. Those weren't really the lure of the series.
Doing it? Not a whole lot. Coming up with it? Tracking them down closely enough that it could be implemented? Maybe.
I've seen that in a fic as well. Even assuming that the boundary is the house itself rather than the surrounding property, why wouldn't they be able to Apparate into the house proper? Isn't that what they did with the whole Yaxley debacle?
Though, on further reflection, since the charm seems to work by messing with perception rather than actually making something invisible, it's possible the person wouldn't be able to perceive that the ball was missing--forgetting its existence or not realizing that it hadn't been retrieved.