It is? That surprises me, given that the only other guaranteed fatal spell is an Unforgivable which the teacher has to fight to demonstrate or teach. (Also, I see nothing on the HP wikia about fatality, and it's usually good with the details; the article on Vanishing mentions multiple examples of non-fatal Vanishing-related things, and speculates that it is non-fatal. Perhaps the staff economize on expenses by re-conjuring all the animals back from Vanishment.)
an Unforgivable which the teacher has to fight to demonstrate or teach.
Are you mixing up canon and MoR? There's no mention I can recall that Crouch-Moody needed any particular permission to demonstrate all three Unforgivables on the first day of class, and he never taught how to cast any of them.
The next discussion thread 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 84. The previous thread has passed 500 comments. Comment in the 14th thread until you read chapter 84.
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.
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: