(Assuming that you meant to say "still alive" and interpreting this as "had ever been done on somebody who wasn't clinically/legally dead"; not sure that that's what you meant, but if not, I don't understand your comment:) Qiaochu has already explained that he was talking about information-theoretic death there.
(ETA: If you meant that nobody's actually been brought back to life, that still doesn't seem to conflict with the correct-by-definition claim that cryonics doesn't work after information-theoretic death.)
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 88-89. The previous thread has passed 500 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.
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: