Dumbledore merely asked to borrow the cloak from James:
“You. You have guessed, I know, why the Cloak was in my possession on the night your parents died. James had showed it to me just a few days previously. It explained much of his undetected wrongdoing at school! I could hardly believe what I was seeing. I asked to borrow it, to examine it. I had long since given up my dream of uniting the Hallows, but I could not resist, could not help taking a closer look. . . . It was a Cloak the likes of which I had never seen, immensely old, perfect in every respect . . . and then your father died, and I had two Hallows at last, all to myself!”
In canon, Harry has been without the Cloak, after taking possession of it, for much longer than three days: in Philosopher's Stone, he left it at the top of the Astronomy Tower after giving Norbert to Charlie (I wonder if Norbert will appear in MoR...), and in Prizoner of Azkaban he left it in the Honeydukes secret passage. If being without the Cloak for a few days is enough to die, Harry should have died in his first or third year. If James hadn't died, Dumbledore would only have been borrowing the Cloak, and he returned it to Harry at close to the first opportunity. It's unclear, therefore, if he would have owned the Cloak for purposes of this theory, but if so I think he should have died well before he did.
Giving up the cloak is not enough to kill you for no reason. You die after giving it up if you've used it to live beyond your span. Dumbledore is old but not out of bounds for a wizard.
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 96. The previous thread is at almost 300 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, 23, 24, .
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: