maia comments on Harry Potter and the Methods of Rationality discussion thread, part 19, chapter 88-89 - Less Wrong

12 Post author: Vaniver 30 June 2013 01:22AM

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Comment author: maia 30 June 2013 01:54:03AM 12 points [-]

Re Marauders' Map: Quirrell pretty obviously has it. He obliviated the Weasley twins and took it. This is just the smart thing for him to do.

Note how he's burning straight through to the melee with the troll at the end of Ch. 89 - so he knows exactly where and in what direction Harry and Hermione are. This could also be because of the psychic link, but it also increases the probability he has the map.

Comment author: pjeby 01 July 2013 07:25:09PM *  2 points [-]

Re Marauders' Map: Quirrell pretty obviously has it. He obliviated the Weasley twins and took it. This is just the smart thing for him to do.

Alternative hypothesis: this is one of several things done by a time traveller creating a consistent time loop. If they had the map, it would have shown Hermione in two places, or else not where she was being attacked. In this scenario, the twins were temporarily obliviated about the map, just so they wouldn't use it. But they still have the map.

The disappearance of the map is actually one of the few clues that IMO raises the probability that a time loop is already in progress, besides the ELIZA discussion with "Brienne". Harry also knows that the time turner prohibition can be defeated, with assistance from an adult wizard; his likely next effort (after securing Hermione's body for possible revival) would be to find another way to circumvent both the use prohibition and Time itself.

But I guess we'll find out in a few hours. (Squee!)

(Not an actual prediction, but it would be awesome if this somehow turns out to be Hermione deliberately faking her own death to assume a cover identity. Among other things, it would be a compelling answer to the "stuffed in a fridge" trope allegations. Not as powerful -- but still more fair to Hermione than the status quo -- would be a flashback that shows her heroically taking on the troll in order to protect someone else, rather than just being a victim. She at least deserves her own epic batlle scene, even if the story requires it appear only in flashback.)

Comment author: Qiaochu_Yuan 30 June 2013 02:02:58AM 1 point [-]

You don't think Dumbledore would've obliviated the Weasley twins after using the map to find Voldemort? That would also have been the smart thing for him to do.

Comment author: Intrism 30 June 2013 02:08:37AM *  4 points [-]

Nah, not really. The Marauder's Map is the obvious thing to try when searching for someone in Hogwarts, he wouldn't release any information to the Weasleys. And, of course, Dumbledore does trust the Weasleys. It did suggest the Map to Quirrell as a device he'd want to confiscate, but it's not really in Dumbledore's nature to think that far ahead.

Comment author: maia 30 June 2013 02:18:43AM 4 points [-]

I guess the question is, how many levels deep is Dumbledore playing? I think it's possible he's smart enough to predict that Voldemort would do this, and take the map away from them as a precaution. But not super likely.

But other than that, I don't see a motivation for Dumbledore to confiscate it; he seems to like that the Weasleys have it. It's a token of Gryffindorishness, flouting the letter of the law to pull pranks and help out their friends or what have you. And Dumbledore likes that, I think.

Comment author: Qiaochu_Yuan 30 June 2013 02:24:07AM 2 points [-]

Right, but Dumbledore also thinks there's a war going on. The map seems like too useful a tool for either side to have for Dumbledore to be so cavalier about leaving it in the twins' hands.

Comment author: Intrism 30 June 2013 02:39:53AM *  4 points [-]

I would understand Dumbledore confiscating the map. But, if he were to confiscate it, he would do only that, not Obliviate the Weasleys such that they'd have no memory of ever possessing such a map. It would seem cruel and pointless to him.

Comment author: Qiaochu_Yuan 30 June 2013 02:42:26AM 3 points [-]

Suppose Dumbledore thinks his enemies aren't aware that the map exists. If he believes one of his enemies is a Legilimens and is periodically scanning the students' minds, he might not want to take the risk of them scanning the Weasley twins and discovering the existence of the map. But I admit I'm stretching at this point.

Comment author: Decius 30 June 2013 04:07:26AM 6 points [-]

If that enemy exists, he already knows.

Comment author: Benja 30 June 2013 11:44:13AM 4 points [-]

Upvoted for qualifying the clever argument with the admission that it is a stretch.

Comment author: maia 30 June 2013 02:52:12AM 0 points [-]

That's a good point. I'm updating slightly in favor of Dumbledore having it, then.

Comment author: CAE_Jones 30 June 2013 02:00:31AM 1 point [-]

Most likely. What I don't remember is whether or not Dumbledore ever gave it back to Fred and George; he presumably did if Quirrel stole it, since I doubt he would have had an easy time getting it from Dumbledore unnoticed. And if we didn't get confirmation that Dumbledore returned it, I suppose this might fuel "Dumbledore did it" theories. Most of my probability mass goes to Quirrel, though.

Comment author: maia 30 June 2013 02:02:06AM 2 points [-]

Yeah, I assume Dumbledore gave it back. He didn't care that they had it before he borrowed it; why would he suddenly begin to care after?

(OK, I can think of a few reasons, but they're pretty weak and don't measure up to "Quirrell took it" in probability mass.)