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Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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.
Adding details to a story makes it seem more probable to humans (it fits together making a better story), when in fact every additional detail reduces the probability. malthrin linked this earlier, you should read: http://lesswrong.com/lw/jk/burdensome_details/
I think your scenario is a conjunction of unlikely events. I think the chance Harry will use a time turner in the solution is quite low, less than 10%, because the set up is such that he won't have access to it until more than 6 hours have passed. I'll give only a 50% chance that Harry will frame anyone at all, and if he does frame someone, I have no reason to believe that it will be Jugson-- I'd say 50% of the time he'll frame Dumbledore (just because it's easy), with decreasing chances for Quirell, Snape, other professors, and finally Jugson occupies such a small bit of my probability mass here that it wouldn't even occur to me.
Just these three items (time turner, frame, Jugson) reduce your scenario's probability to something very small; I put 2% on predictionbook, but my true probability is probably much lower.
(ETA: I realized on a re-read that my usage of "frame" above is non-standard; I was thinking broadly of turning the blame onto someone, not just of retroactively planting evidence, to which I give a much lower probability.)
Hmm. It was foreshadowed that Harry might frame Jugson if the latter pokes him. And Jugson did come up a lot in the later chapters. I think it was Jugson that cried for Azkaban first, which could be taken as poking. “Jugson did it because Hermione bested his son, and wants to ‘replace’ Malfloy (Jugson’s is an ancient family)” sounds like something one might convince Lucius of, or at least make him highly suspicious. Sending Hermione to Azkaban would be convenient in the scenario, getting rid of a possible clue. Though if it was Jugson that asked for Azkaba... (read more)