I'm pretty sure HJPEV could precommit to not using the stone himself, in order to use it on others.
I don't think that would be enough. In canon, Quirrel wanted the stone to use on Voldemort, not on himself, and he couldn't get it.The only way to get the stone in canon would be to want to have it to keep someone else from having it. HJPEV would want to use it on other people, therefore he can't get it. Unless he could get an exception for wanting to give it to someone else, who would then be able to use it.
(The HPMOR discussion thread after this one is here.)
The previous thread is over the 500-comment threshold, so let's start a new Harry Potter and the Methods of Rationality discussion thread. This is the place to discuss Eliezer Yudkowsky's Harry Potter fanfic and anything related to it. The latest chapter as of 09/09/2011 is Ch. 77.
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: one, two, three, four, five, six, seven, eight. The fanfiction.net author page is the central location for information about updates and links to HPMOR-related goodies, and AdeleneDawner has kept an archive of Author's Notes.
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: