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Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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.
You don't actually know that Bob didn't see the enemy at the pass, you only know that for some reason, Bob didn't come back and tell you. Perhaps the reason he didn't is because you would have sent that information back in time, and so he couldn't.
Another possibility is that information loses "coherence" the further back it travels. (or forward, depending on which side your standing on) Think of it as a signal to noise problem - six hours isn't the limit, it's the limit of what we can correct for with the magic of the time turners. Prophecy seems to defeat the limit, but only by being nearly incomprehensible.
Or maybe it is possible, but insanely dangerous. There are hints that Atlantis was destroyed by something involving the time stream.
But every time someone uses a time turner, they send that information into the past. If it didn't block them then, why would it block them now?
There are ways of fixing that. For example, you could send people back in groups of three. Then you have them go back unless they're stopped by at least two people.
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