The new thread, discussion 13, is here.
This is a new thread to discuss Eliezer Yudkowsky's Harry Potter and the Methods of Rationality and anything related to it. With three chapters recently the previous thread has very quickly reached 1000 comments. The latest chapter as of 25th March 2012 is Ch 80.
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: one, two, three, four, five, six, seven, eight, nine, ten, eleven.
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Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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.
But would you want to "[punish] undesirable behaviors even if there is no benefit to doing so after the behavior has occurred"?
I would want to pre-commit to punishing criminals after the fact if I thought this would lead to a world where the pos-util of averted crime outweighed the neg-util of punishing people, but not if there were no benefit, and I would be doing this on consequentialist grounds. (I'm basically asking if the deontological view truly "has its place' in this scenario.)
Before the person made the choice of whether or not to do the undesirable behavior, I would want to have precommitted to punishing them if they did the behavior.
In the real world, punishing criminals (probably) does reduce crime. In a world where it didn't, precommitment wouldn't be a useful strategy. But it looks like we live in a world where it does.