Harry Potter and the Methods of Rationality discussion thread, part 23, chapter 94

elharo

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:

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Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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.

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Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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.

... Sudden idea.

The limitation on Time Turners is that they cannot send information back farther than six hours, through any sequence of people or Time Turners.

However, "information" here has been shown to have a very loose, non-physical definition - in the same way that brooms are Aristotelian, magical "information" has an intuitive definition. Bones is able to tell Dumbledore about the existence of future information (presumably) without automatically barring Dumbledore from then traveling back himself, for example.

So it's possible, then, that "information" could be erased simply by hitting yourself with a Memory Charm, allowing you to travel back farther than six hours with a Time Turner depending on how much you erased. This would solve the general problem of the Peggy Sue hints, by allowing Harry to solve time travel using foreshadowed methods in the remaining fifteen-twenty chapters or so of the fic.

As far as the point... well, while "information" hasn't passed through time, information certainly has. Harry is more mature, more driven, and, most importantly, knows that something bad enough happened to cause him to travel back in time. He will be viewing everything that happens in his first year as either a potential existential threat, or a potential threat to someone he or past-he cares about.