3) Voldemort is evil and cannot be persuaded to be good; the Dark Lord's utility function cannot be changed by talking to him.

The rules stated that we couldn't change Voldemort's utility function or turn him good, but his utility function already placed an extremely high value on not having the world destroyed, or losing his immortality. It was quite possible that the solution would have been to convince him that killing Harry would end the world, or that he required Harry in the future in order to save it. The Vow and the parseltongue both were valuable tools in convincing Voldemort of this.

9fubarobfusco5yVoldemort doesn't want the world destroyed, and he just made Harry into a world-destruction-preventer. Pointing this out — and pointing out that Harry is now a better world-destruction-preventer than Voldemort could become — doesn't involve changing Voldemort's utility function. (Voldemort can't swear an Unbreakable Vow akin to Harry's because nobody has trust in him that could be sacrificed to power it.)
6MathMage5yHe doesn't have to be persuaded to be good, he just has to be persuaded to let Harry out of the box. If he lets Harry out of the box for non-good reasons, that still counts.

Harry Potter and the Methods of Rationality discussion thread, March 2015, chapter 114 + chapter 115

by Gondolinian 1 min read3rd Mar 2015430 comments

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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 114, and also, as a special case due to the exceptionally close posting times, chapter 115.

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Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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