Prediction: people who aren't Harry can use the stone once every 216 seconds (3:36).
(The idea being that the rule is "400 times a day" and Harry has a 26hr day.)
Harry's sleep cycle has been adjusted to a 30-hour day in Chapter 65, in the same way that Dumbledore had previously adjusted it to a 26-hour day.
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 119.
Plans for next chapter release:
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.)