The next discussion thread is here.
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 85. The previous thread has long passed 500 comments. Comment in the 15th thread until you read chapter 85.
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.
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:
You do not need to rot13 anything about HP:MoR or the original Harry Potter series unless you are posting insider information from Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).
If there is evidence for X in MOR and/or canon then it’s fine to post about X without rot13, even if you also have heard privately from Eliezer that X is true. But you should not post that “Eliezer said X is true” unless you use rot13.
I was re-listening to the podcast of Chapter 20 (Bayes's Theorem) when I was struck by an idea. It builds on another idea I heard in this same forum. The original idea was that Quirrel had Horcruxed the Pioneer plaque and that, due to the nature of magic, his Horcrux passing beyond a distance of 6 light hours would lead to his death due to a limitation on magic's ability to affect things more than 6 hours into the past - which would be needed for faster than light communications.
Having now re-listened to that chapter, I've picked up some new clues. Harry had made the suggestion that it might be possible to add an entire human mind's worth of information to the Pioneer plaque by creating a portrait or arranging for a terminally ill person's ghost to be attached to it before launch. Quirrel of course denied that he had done anything like that through a bit of misdirection. This leads many to speculate that he had Horcruxed the probe, downloading a copy of himself into it for posterity.
I had the idea that perhaps he downloaded himself into the probe and then started to operate his body by remote control. When his body goes limp, it's because he's not at the 'controls' at that moment. Once the probe passes beyond 6 light hours, it will become impossible for him to continue to tele-operate his body any longer and he will be trapped on the probe for the rest of its flight time. I believe he is revealing an important clue in the following paragraph:
Is he contemplating the eons that await him while the probe moves on to 'some other place'? Does he plan to put his mind on hold, to sleep, for most of that flight time?
Very clever idea! But it doesn't pan out, sadly. I just checked on Wolfram-Alpha. The distance from the earth to Pioneer 11 on the Ides of May, 1992, Quirrell's presumed last day of class, is actually 4.84 light hours, not 6.
Some experimenting on W-A shows that Pioneer 11 passes 6 light hours around August 25, 1995.