It's called Finite Incantatem.
Think about what would happen if Dumbledore (strong wizard, has all sorts of authority) cast Finite Incantatem on his desk, and the spell doesn’t include a “do what I mean, not what I say” security feature.
There must be thousands of spells in that general area. Even if for some reason the desk wouldn’t be disenchanted (which probably it wouldn’t, else casting Finite on someone holding a filled magic pouch or near a magic trunk would be very dangerous, and someone would have mentioned that in MoR), it still probably has dozens if not hundreds of other spel...
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 94. The previous thread has passed 200 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.
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: