Well, what if even uber-time travel still has the paradox limitation. Harry figures out his becomus-goddus spell, and can go back in time arbitrarily far.

But if he mucks about with his own past in any way he doesn't remember he may unhappen his omnipotent ass. Moreover, this is true of almost all of history. Any mucking about that might prevent his timeline from making him invincible would be verboten.

So, what could he do? Not go back and tell himself everything, it would be a big gamble that his past self could consciously fake its way through the eve... (read more)

In that scenario he could become a closed timelike curve: go back, become the being that invented magic in the first place, and program it to record the brain states of everyone at every moment in there lives for future recall given a spell or ritual that he would then know. This could also explain the "Atlantis erased from time" business. It would rely on magic changing the laws of physics in a way that allows magic time travel to operate before magic existed - or for the invention of magic to have happened outside the timestream.

Harry Potter and the Methods of Rationality discussion thread, January 2015, chapter 103

by b_sen 1 min read29th Jan 2015174 comments


New chapter, and the end is now in sight!

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 103.

There is 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.)

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Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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