Agreed that it seems overly risky, but conservation of narrative detail says it's the ring regardless. And I can buy Harry going for a clever red herring ploy even so. (Also, coming out of his goodbyes, he presumably burned out most if not all of his time turner turns for the day, but I forget if he was about to get new ones in time to hack it if necessary.)
You'll have to explain why. It seems to me my theory fits the details just as well and isn't prone to catastrophic failure given a slightly more diligent DD. Even if it is the ring, he still precommits to going back in time to do the swap, just in case DD does turn out to be sufficiently diligent.
There's no way he burns all the time turner uses for the day at once unless there's no other possiblity. He learned in Azkaban that you always leave yourself wiggle room. And entirely aside from that, it's good for 6 uses per day. It's a new 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 94. The previous thread has passed 200 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.
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: