Harry Potter and the Methods of Rationality discussion thread, part 9

Has it occurred to anyone else how good magic would be for psychological experimentation?

To start with, imagine you get the consent of your subjects to be Obliviated. Then, you can try exposing the subjects to differing stimuli while they're in exactly the same starting state, and you can precisely and easily measure the effect of whatever change you've made.

Even better, imagine the marketing opportunities. Think of Mr Hat and Cloak's dictionary attack, but with a focus group, and different advertisements for your new product. Show them the ad, then ask them how much they liked it, then Obliviate them again.

Also, you could try to remove the effect of priming on yourself with self-targeted obliviation.

And you could go on 4chan, knowing that what has been seen actually can be unseen, leaving you with only a note saying "Don't look at SqueeHorse" or something.

I really want magic.

I have an idea for an epic maneuver that a wizard could perform as a last resort in certain emergency situations. A severely wounded wizard could, if there is something of much greater utility then his own life on the line, transfigure himself into a healthy version of himself in order to continue the fight. This would be a death sentence, but still worth it if the stakes were high enough.

Then again Harry can already sustain a small transfigured object even in his sleep. Perhaps the most powerful of wizards could sustain a transfiguration on their own body indefinitely. Or... Professor McGonagall said that it would be possible for a child to transfigure themselves into an adult bodily form. Perhaps if the wizard could not sustain an object the size of their own body indefinitely after the emergency situation has passed they could again transfigure themselves into a adolescent, child, or midget form in order to achieve a body with a volume that they could sustain. Unless doing another transfiguration would cause the consequences of the previous transfiguration to be imposed on the new form. Though I don't see why that would necessarily be the case.

This would be a very fragile sort of existence. They would be much weaker due to the constant drain on their magic and incapacitation or anything that dispels the transfiguration would result in death.

Ok. I really don't like the new omake with the ponies.

I understand that Eliezer is trying to criticize overemphasis on peer review. But the bottom line is that peer review is really important: groups of humans who look at something critically are much more likely to notice mistakes and flaws then one will notice by one's self. This is not a trivial point.

It's been awhile since the last update, so here's a scene from the HPMOR in my head.

Hermione offers Harry a Bertie Bott's Every Flavour Bean, warning him that when they say "every flavour" they mean every flavour. The first one that Harry eats is booger-flavoured, and he gets frustrated about the foolish candy-makers, complaining that of all the flavours that he could've gotten, his first bean tasted like boogers. Hermione reminds him that it says "every flavour", so he shouldn't be surprised if it ended up tasting like something nasty. Harry has Hermione list flavours of Bertie Bott's beans that she has eaten, and then goes on a rant:

Out of all possible flavours, every single flavour that Hermione has mentioned is recognizable as something regularly found on or in the human body, and the majority are types of food. Harry tries to explain the concept of flavourspace - the entire set of all possible flavours - and what a skewed understanding of flavourspace wizards must have if "every flavour" beans only draw from the tiny proportion of flavourspace which they already regularly taste. So, yes, he should be surprised that the first bean he ate, which could have taken on any flavour in the vast universe of flavourspace, tasted like something that normally grows just inches from one's taste buds.

Chapter 14:

Otherwise we shall see you again three months later and you will be two years older and dressed in a loincloth and covered in snow and that's if you stay inside the castle.

If this sort of time-stretching effect could be controlled, it would be incredibly useful. One could research and prepare at leisure for an imminent attack, at a much better speedup than the mere 25% offered by Time-Turners. If it can go the other way as well, Salazar Slytherin might very well still be alive somewhere in Hogwarts.

Real World Effects of SPHEW

Raemon has written at moderate length about feminist issues in HPMoR. In fact, this post is credited by Eliezer as

High probability this comment had something to do with the surprise creation of SPHEW.

I don't wish to speculate about these issues because I don't feel I have the depth of knowledge needed to contribute meaningfully. However I do have a real life effect of SPHEW to report.

I produce the Methods of Rationality Podcast. For the most part it's a solo project, but after receiving a few requests I've gotten comfortable enough with it that I've decided to integrate other voices as long as it doesn't require much additional work from me. Meaning - just send me the audio file of you reading the lines and I'll incorporate it if I can. I didn't really expect much response from this approach, and for the most part I didn't get one. Seems no one is really interested in doing Gregory Goyle's lines. :)

With a notable exception. The girls of SPHEW. I received a complete reading of all of Daphne's lines before I even announced I was willing to take other voices. It was one of the primary motivators for overturning my previous policy and saying I would accept others. Since then I also received all Tracey's and the start of Susan's with a commitment of a full reading. I'm still at least two months away from the first appearance of any of the SPHEW witches, and probably a full year away from their eventual official SPHEW adventures.

I believe SPHEW has indeed promoted heroism among witches in the real world. Regardless of what feminist themes may have been explored, it's my opinion that SPHEW has had a positive real-world effect. :)

While I was reading Harry Potter, I kept thinking that the House system was destructive, both in terms of making people impose restrictions on themselves, and creating deep divisions in the wizarding world. Hogwarts is in this sense the primary cause of both the previous and the coming wizard war.

In Eliezer's fiction, it's more apparent that the Hogwarts house system is a mindless, destructive mechanism set in motion hundreds of years ago that no one person can change or escape. Even Dumbledore couldn't abolish the house system; the political pressure would pop him out of Hogwarts like a cork from a champagne bottle.

I don't understand why Dumbledore can't maintain order among the students and protect them from each other, though... it seems to be within the powers of the Hogwarts faculty, if they set their minds to it.

Dumbledore and McGonagall's weaknesses are more apparent in Eliezer's fiction. Which would score realism points with me, except that the deconstruction of the perfect Dumbledore is balanced by the imagination of a perfect Harry.

In the previous thread there was some discussion on Ch 76's obliviation powered dictionary attack on Hermione. Most of that discussion seems to have assumed that what we saw between Hat And Cloak (HAC) and Hermione was simple to understand and relatively unskilllful... with Hermione's "tootsie pop" response being inane and HAC's probing appearing ham-handedly ignorant.

My impression was that we didn't see the first or second cycle of relatively normal behavior for either character, but more like the 7th cycle (12 minutes per cycle for 90 minutes?), where HAC was doing something radically different each time to probe Hermione's knowledge, feelings, etc in different ways, probably using legilimency. She was exhausted, like someone "in the box" with the police, except more stressful due to not even knowing she's in the box. And the questions don't have to be subtle, they just have to make her think of useful things while her eyes are visible. I don't think she was the ultimate target either, but rather she is the closest non-occlumens to Harry other than possibly Draco, so mind raping her to learn about Harry is "safer" even if it demonstrates horrifying levels of evilness... which raises issues about how to hide that it happened from Albus and Minerva.

I'm curious what other people's takes on the situation are. Specifically, what cycle do you think we saw out of how many total? Also, what are the odds that Hermione will be dead or missing in the next substantive chapter?

Re Chp 35

I searched all the threads, and didn't find any mention of this. There's a hint in the conversation between Hat&Cloak and Zabini: namely, the fact that there is a conversation at all. Why does H&C need to talk to Zabini if he's just going to obliviate him anyway? Here's one possible answer: he needs some information from Zabini.

I don't think he needs Zabini's report on the conversation — partly because he keeps talking afterwards, and partly because there are independent reasons to think that H&C is either Quirrel or an agent of Quirrel's. (For instance, the "keyed into the wards" comment, as well as the fact that H&C exactly predicts Quirrel's reaction to Zabini's statement, and the fact that this statement ended up benefiting Quirrel.)

So what information does H&C need? Note that he tells Zabini, "The reward I promised you is already on its way to your mother, by owl." In other words, Zabini was clever enough to insist that his reward go to a third party, leaving someone around to remember that he's owed an award in case he's obliviated. H&C seems to me to be turning the conversation at every step towards Zabini's mother. Eventually, he receives the information that Zabini doesn't know how his mother persuaded her last suitor to marry her.

It's unclear why this information would satisfy H&C, but it does seem that he needs to take care of Zabini's mother in some way (obliviate her, probably), and that he's trying to figure out how difficult this will be. This seems reminiscent of Quirrel's later behavior towards Auror Bahry — he tries to figure out exactly what Bahry knows and what the other aurors expect so that he can appropriately memory-charm him.

Any thoughts on the matter?

An idle bit of speculation, which has probably been brought up before, but it occurred to me that MoR Voldemort, being more intelligent than his canonical counterpart, may not have seen fit to stop at a mere 7 horcruxes. Why not simply make as many as (in)humanly possible, rather than adhering to some superstitious wishy-washy stuff about "7 is a powerfully magic number"? It is almost certain that the mechanics of horcrux-construction in MoR are different from those in canon (e.g. mind-upload rather than soul-splitting), so perhaps the limit that Canon!Voldemort faced (unstable soul-fragments) is not something that would be encountered in quite the same form as MoR!Voldemort.

To provide the merest scrap of substance to my speculation, I noticed that in Chapter 53 (TSPE, Part III), Quirrell states:

“Yess,” hissed the snake, “but do not underesstimate her, sshe wass the deadliesst of warriorss.” The green head dipped in warning. “One would be wisse to fear me, boy, even were I sstarved and nine-tenthss dead..."

The bolded interests me, partly because of something Dumbledore states in Chapter 61 (TSPE, Part XI):

"...Voldemort’s final avenue is to seduce a victim and drain the life from them over a long period; in which case Voldemort would be weak compared to his former power."

Slowly draining a victim's life and being weak compared to his former power is certainly what occurred with Canon Voldemort possessing Canon Quirrell--perhaps MoR Quirrelmort benefits from a similar arrangement? If so, the adjective "starving" certainly fits.

Now, we already know that Quirrelmort likes to play ironic little games with what he says--in fact, he admits as much himself in chapter 51: The lips twitched again, and then went flat. "Then I shall skip it. Mr. Potter, you sometimes make a game of lying with truths, playing with words to conceal your meanings in plain sight. I, too, have been known to find that amusing."

To return to the point, if hypothetically describing himself as "starving" falls into the same class of ironically veiled truth-statements Quirrelmort enjoys dropping from time to time (see ch. 49: "If only You-Know-Who had lived, you might have persuaded him to teach you some of the knowledge that would have been your heritage, from one Heir of Slytherin to another," or perhaps "Tell them I ate [the dementor]"--->"I am a death-eater", or again Harry had asked why Professor Quirrell couldn’t be the one to play the part of the Dark Lord, and Professor Quirrell had pointed out that there was no plausible reason for him to be possessed by the shade of He-Who-Must-Not-Be-Named), what might be the import of "nine-tenths dead"?

My thought was simply that "nine-tenths dead" might be a clue as to the number of Horcruxes MoR!Voldemort created.

Blocking the Unblockable Curse.

This is mostly related to canon, but also a bit to HPMoR.

I've always wondered why the killing curse counts as "unblockable". In "Order of the Phoenix", Dumbledore blocks it by moving a statue in its path. Seems to work nicely. There is other evidence that solids stop the killing curse -- if it went through it, you could accidentally kill somebody behind a wall when missing your target. Prof. Moody would surely have mentioned that danger when talking about the killing curse, if that was the case. So you could carry around a steel plate strong enough to block the curse, and quickly move it into its path. Not easy, but possible.

There are also several instances where simple spells conjure animals (I remember bats and small birds). I wonder if you could simply conjure an animal into the way of the killing curse. It might need to have a minimal size to work, but a powerful wizards should be able to do that.

I also wonder if there are ways to combine charms: one detection charm that triggers another one. For example one that detects killing curses, and enables apparation or a portkey.

So, one proven way to block a killing curse, one conjectural, and another conjectural way to escape it. I can't believe the wizards still call it "unblockable" :-)

Chapter 76: "And that's why I can destroy Dementors and you can't," said the boy. "Because I believe that the darkness can be broken."

This is interesting, because it touches upon a thought I had about the Dementors back in Chapter 45. In canon, Dementors are manifestations not of death or even fear, but of despair. (I believe Rowling has said she drew upon her own experiences of depression.) That's why chocolate helps, why they generate feelings of hopelessness, why they take away happy memories and leave unhappy ones, and why their ultimate power is to put people into a coma rather than to kill them. None of this makes sense for a manifestation of death.

But Harry's response would work either way. A happy memory, a pleasant thought, can shield against despair, but it can't destroy it. Hope, on the other hand, true grim hope – the belief that things can be made better and, crucially, the unshakeable determination to make them so, not by thinking 'wouldn't it be nice if…' but by knuckling down and solving the insoluble problem – is the only true cure for despair. And that sort of hope, which Harry shows, is actually pretty hard to hold truly, which would explain why almost no-one else has found the same way that Harry has.

I don't believe this was Eliezer's intention. Harry's views on death are far too close to Eliezer's own as shown in http://yudkowsky.net/singularity/simplified for me to feel that the Dementors are intended to be anything else. But I quite like my interpretation. Aside from anything else, since that sort of hope can be reinforced by being shared (enhancing both resolve and the feeling that the task is possible), it leaves open the possibility for a Patronus 3.0 by group-casting.

Well I am in HMPOR withdrawal so I will post an idea that I have about the origin of the "unverbalizable fear" that Harry has while under the sorting hat about going to Hufflepuff where he will be happy. This idea is based on the few descriptions of the relationship between harry and his father in the early chapters

I was going to post the excerpts in this comment, but it is quite a bit of content so I will abstain for now. If someone wants me to post the excerpts I will. For now suffice it to say that Harry does not feel respected by his father and the only positive feeling that his father is said to display towards Harry is pride.

His eyes glanced over to his father Michael Verres-Evans, who was looking stereotypically stern-but-proud

You might say that his father dropping everything for a last minute book buying spree was a very kind thing to do. Indeed Harry himself says that his dad is "awesome" because he buys him books, and uses the memory later when trying to cast the patronius charm. However, considering the lack of respect and affection that Harry's father shows I have to ask if the book buying spree was really for Harry. It seems more likely to be an attempt to help Harry "be all that he can be" not for Harry, but for himself. So he can continue to feel proud about the achievements of his child.

Children need the expression of love and affection from their parents in order to feel secure. If all Harry can get from his father is pride then it will be very important for him to maintain it. I submit that Harry's unverbalizable fear is an unconscious fear of abandonment(death for most of human history) if he loses his fathers pride by choosing the path of happiness over achievement.

I've been searching a bit, but didn't find any "process" for translation of HP:MoR. Being a native french, I can offer a bit of my time to translate part of it, but :

1. I would like to know what's the standard process, since a translation can at some points alter the meaning, is there any review or agreement from Eliezer required ?

2. There seems to be two french translations already started. I don't want to conflict with other persons. Are the current translators still active ? If so, do they require help, or do they prefer to work alone ?

3. Do you think it would be a good idea to setup a discussion on LW or a wiki page about translation in general, with the process, the status of the current translations (if the translator(s) are still active or not, ...) ?

I find myself wondering about the supposed safety of Hogwarts. The wards are given as an explanation for this but if students are able to constantly hex each other in the halls, Quirrel is able to cast extremely powerful spells, and an unnamed 6th year replicated the Sectumsempra incident from cannon without any apparent interference from the wards I cant imagine what it is exactly that the wards are supposed to do to insure the safety of the students.

Consider that the school is full of 11-18 year olds with access to weapons of mass destruction and it seems to me that the apparent safety of the place for the past 50 years is due to luck rather then anything inherent in system.

I've been reading a chapter of MoR to my girlfriend every time we go to a park, and we just got up to Chapter 39. Two thoughts:

1. It's fun to try to imitate a long series of random noises with your mouth alone in a public place.

2. Sarah's immediate reaction to the first part was "Why doesn't he just ask Harry for a Pensieve memory of his conversation with Lucius? Dumbledore doesn't use notes." I can't see why not either. My first reaction was that Pensieves haven't been referenced in MoR yet and might work differently, but I was wrong; Draco's going to use his memory of Harry's first date to blackmail him.

I was just wondering: does anyone else hope Eliezer fleshes out Magical History? I find it a pity that we don't get to see how Magical Britain became what it is now. I mean, so far he's reflected (very broadly) on the current political situation through Draco, but he's continued to keep us in the dark about Voldemort's rise to power, the situation that led to that, the circumstances surrounding the beginning of magic (as a technology, since Harry has confirmed that the rules for spells aren't natural laws), the founding of Hogwarts ...

So, which do you all think are most important for Eliezer to touch upon? Can you think of any others you want to see?

Also: I know that wizards generally ignore muggles, but they are another entire civilization, with documentation of their history, living in secret right next to the Muggle society. Wizarding history could provide a lot of insight into Muggle history because of how the two are so closely related.

I'm interested in discussing the world Eliezer has created. Its alternate in obvious and subtle ways. Obviously, in this world both Harry and Quirrelmort are rationalists, but lots of other elements have changed.

-Dumbledore seems more changed by war than his book incarnation, to the point where he is making some obviously bad choices that have impacts on the school -The school is a more dangerous place than it was in the books. By this, I mean that in books 1-4, despite some hijinks, the actual danger was pretty darn low- in first year Harry had to actively try to get into mortal danger (ignoring some deeply unsubtle assasination attempts by Quirrel). In particular other students are never a danger to each other, yet theres a strong implication that here fights really can escalate- or at least that was the attempt with the Heromione arc. This is probably due in part to Dumbledore's approach (I don't believe that the 'Dore of the books would have tolerated such an escalation at all), and the beefing up of Slytherin house, and the Malfoy's in particular. While Lucius Malfoy was clearly a powerful individual in the books, his manipulations were fairly clunky, and nowhere near as subtle as portrayed here.

I think I need to have it in my head that many of the characters are subtly different here, because sometimes I read their portrayal as mocking the attitude in the books, and while sometimes that IS whats happening, sometimes its just because the characters aren't quite the same.

I think that the new information 78 would give us to discuss ought to balance out the cliffhanger, no matter how large.

Also, I wonder if Harry might use the Headmasters conclusions about the return of the Dark Lord to request private lessons. Most likely not Horcrux-related lessons, but similiar to what Ron and Hermione expected Dumbledore to teach him in Canon. In this universe Love is certainly not Harry's Deus ex Machina, so Dumbledore ought to want him to be more competent in Battle Magic.

Are time-turners really not turing computable? Is Harry ever going to figure out what allows magic to (seem to?) break the laws of physics? Is "we're living in a simulation" eliminated as a possibility?

Just reread chapter 40.

"Which is why the Resurrection Stone is not the most valuable magical artifact in the world," said Harry.

"Precisely," said Professor Quirrell, "though I wouldn't say no to a chance to try it." There was a dry, thin smile on his lips; and something colder, more distant, in his eyes. "You spoke to Dumbledore of that as well, I take it."

Sounds to me like Quirrell had never heard of the resurrection stone before this conversation. Later in the chapter, it becomes apparent that he has never heard of the deathly hallows symbol. After Harry shows him the symbol, he excuses himself and cuts short the outing. Perhaps he has seen the stone before and is running off to find it? His ignorance fits with canon, where he uses the Peverell ring (with the stone inset) to make a horcrux.

Cross posting what I wrote on TV Tropes

'm pretty sure i've figured out quirrelmorts plan for harry and magical britian. To TLDR it for you guys, hes going to train harry as a caesar, and use harry as a figurehead/puppet to force magical britian into a war of conquest with the rest of the magical world, probably selling it as a world wide war on dark wizards. Then once england owns the wizard world, they own the entire world since you can't fight invisible mind rapers.

Viewed in this context all of his actions start making sense. Harry is a very well known figurehead and a natural leader for magical Britannia to unite behind. Suddenly quirrelmorts speech of uniting magical Brittan under one person (harry) makes sense, once you've imbued all the power into a single leader its a lot easier to effectively run a war, as well as hurting harry's main competition for power. His first step is to go to Hogwarts, the most important place in england. He organizes it so that he can get away with blatantly improving the combat effectiveness of all the Hogwarts students there, developing and show casing the future generals and officers of the later wars. Also because those generals and officers will develop followers, all he has to do is gain influence over those people and he gains all of their followers as well. He also gets to develop his own Caesar, Harry. Hes already said that power in the magic world flows from strong wizards and their followers.

Then he convinces harry to undertake a war against the magical world. He points out that it will impossible to get rid of things such as the power of the noble houses and Azkabhan without taking power. He also points out to harry that if he wants to raise the living standards of the muggle world he will need a united magical world behind him, something that he will be unable to do by peaceful means since he will first need to exterminate all of the dark wizards. With both harry and quirrelmort on the same side with technology they would be able to both curb stomp other countries and administer them effectively.

Then with Harry's participation, he puppet masters a civil war in another country and gets magical England to step in to save the country, and get harry/draco appointed/showcased as wonderful warriors. They then use this power to keep taking over more and more of the real power in england. Then you start administrating the new country as a vassal state, raise more recruits, get a bigger army, rinse and repeat until they own the magical world. Then with the magical world united they own the muggle world since lets face it, you can't fight a foe that can turn invisible and mind rape your leaders.

And of course since england is ruling the world as an empire, and harry is ruling the world as caesar, and quirrelmort has his hooks into harry, quirrelmort now rules the world. Or at least thats what my plan wold be if I were quirrelmort.

Also on rita skeeter, they either memory charmed her into believing everything herself, or imperiused her into doing so, or simply used the polyjuice potion to turn it in themselves. My money would be memory charming her because it would be the most practical reliable way of getting her to believe everything, writing an authentic article and convincing her editor to run it the next day as the headliner.

Is it possible to get Dementors to play poker with you by strongly expecting that behaviour?

Chp 78 ---

Eliezer, given all the waiting, and that Chp 78 is 17K words, can we have a NY gift of Chp 78 in 3 parts? 5K each spaced about a week apart? That should take us till the third week of Jan :)

From an addict's perspective, drip helps :)

Eliezer is now recommending specific readings for the "Know everything Harry does!" quest instead of handwaving it with "eh, just study every single thing I wrote after 2005 and you'll be a much bigger threat than Harry."

I've gotta say I appreciate this, all the more because it's probably tedious work.

In short, エリエザー様万歳！

And as long as we're trying to find magical exploits, I wonder what Harry would do if he got his hands on some Felix Felicis.

For instance, if he locked himself in a room with only a weegie board (or scrabble tiles), would it be forced to spell out whatever information he needed to know? Would it only answer his direct questions, or could it just start warning him about all of Quirrell and Dumbledore and Lucius' plans and how to beat them?

Does anyone else wonder why Sirus hasn't shown up in this story yet? I get the whole

Peter Pettigrew x Sirus Black = tragedy lovers keeps them from being central to the story up to this point

But is it still an accepted fact in MoR verse that Pettigrew is innocent?

I've already posted this in the reviews as well as on TvTropes, but I figure it can't hurt to share it here as well. (As well as pose it somewhat more formally.)

Harry's freak-out in the beginning over the animagus transformation got me thinking. Between the two possiblities: a) the laws of physics Harry believes are wrong and b) the animagus transformation only appears to violate Conservation but doesn't actually do so, it seems fallacious to skip to possibility-a without ruling out possibility-b.

After some thought, I was able to generate a hypothesis for how Variable-Mass Shapeshifting Between Multiple Fixed 3-Dimensional Structures might work without violating Conservation; I don't know enough about physics to guess if it is plausible--One of the clues I'm basing this guess on was that Harry did not in any way remark upon the existence of containers that are bigger on the inside than on the outside, and the inference that magic can create space and that this does not violate any law of physics that Harry knows of.

The two or more 3-dimensional forms with differing mass all exist simultaneously in an unchanging 4-dimensional superstructure. The form that is perceivable in our 3-dimensional universe is whatever cross-section of the superstructure happens to intersect our 3-dimensional grid, and "changing form" involves only unidirectional motion along the inferred extrauniversal axis.

VMSFF = Variable-Mass Shapeshifter with Fixed Forms

Possible Evidence for:

• VMSFFs rarely have more than one alternate form. (Magic has to create space for each alternate form on the 4th spacial dimension. No indication that additional space does not require additional energy to maintain.)
• VMSFFs transform quickly. (Same reasoning as above: there is as little intermediate matter as possible.)
• VMSFFs demonstrate similar cognition regardless of form. (Suggests both brains are present and active at all times.)

Possible Evidence against:

• Dementor effect is less in animal form. (Suggests that either both brains are not equally present, or that Dementor Effect is constrained to 3-dimensional space.)
• Animal urges change with the form. (Suggests that both brains are not equally active. Weak evidence, as bleed-over of urges between forms is observed.)
• Injuries in one form translate to the other(s). (Suggest the two forms are not separate parts of a larger entity.)

Tests:

• How is an animagus form destroyed? (Is it closer to Amputation or Obliviation?)
• Does wearing heavy clothes vs. nudity affect the amount of energy necessary to transform? (Does the difference in energy match the inertia of the clothes?)
• What does the change feel like to the animagus? (Is it sensationless as switching from one set of sensory imputs to another would suggest, or is it sensable as having sensory imputs within changing matter would suggest?)
• In the case of the Wolves in Luminosity, is the mass of consumed food greater than the mass of the Wolf's human body plus waste? (If so, does the cumulative difference match the mass of the Wolf upon first Floof? For animagi, does the magical energy expended to create the alternate form in the first place match that needed for the transfigured-creation of a similar mass?)
• Is being an animagus a permanent drain on one's power?

In any case, I've been thinking about it for a while and a 4-dimensional superstructure is the only way I can imagine it working. Alternate Hypotheses anyone?

A hypothesis I'm currently toying with: Quirrell and HJPEV are different versions of the same individual, in some sense, and the Quirrell version is using some form of magic (probably involving breaking the 6-hour-limit on sending information backwards through time, possibly involving possession of a real Quirrell) to carry out a process of recursive self-improvement on himself. The story we're currently reading takes place in one iteration of the loop.

Has anyone posted this idea before on the net?

There are some serious problems with this hypothesis:

• Quirrell and HJPEV appear to have very different utility functions.
• Performing recursive self-improvement starting with a human hardly seems like the kind of thing Eliezer would advocate, considering the likelihood of ending up with an unfriendly superintelligence.

So it's probably wrong, but I thought it was interesting enough to post.

Sorry if this has been asked before, my meagre google-fu skills fail to reveal it.

Chapter 55. When Harry cast his Patronus in Azkaban, he lost some of his "life" to sustain it:

Slowly the light died back down.

Part of Harry's life flowed back into him.

Part had been lost as radiation.

[...]

So Harry walked on, leaving a piece of himself behind. It would dwell in this place and time forever, he knew. Even after Harry came back someday with a company of other True Patronus casters and they destroyed all the Dementors here. Even if he melted the triangular building and burned the island low enough that the sea would wash over it, leaving no trace that such a place as this had ever once existed. Even then he wouldn't get it back.

If you taboo "life", what exactly did Harry lose there and why should he never be able to regain it? It seems unlikely that MoR of all things subscribes to the idea of living things having a life force in some vitalist or spiritualist sense...

Also, will this have any effect on anything in the story? Did Harry permanently weaken his own magical potential or something of that sort?

J.K. Rowling is releasing some character bios on Pottermore, and showing a flagrant disregard for MoR!canon. In particular, McGonagall's father was a Muggle Presbyterian minister. Even though, in MoR:

Minerva stared at Severus, feeling sick to her stomach. She had studied Muggle religion - it was the most common reason for needing to Memory-Charm the parents of Muggleborns - and she knew enough to understand what Severus had just said.

Furthermore, per the bio McGonagall was ten years old and still living in the Muggle world when atomic bombs were dropped, so she'd probably know about nuclear war.

Obviously this sort of collision is inevitable, and since it's a full-blown AU there's no obligation to fix it. In this case, though, it might be possible to enhance the text with some minor retcons. In chapter 61, maybe when Severus mentions prayer, Minerva remembers her childhood and thinks "they had offered prayers, every dinner and every Sunday at church, for the brave soldiers at the front. It had seemed impossible to her, at that age, for any remotely humanlike being to even consider not answering them."

Then later in the same chapter, when Dumbledore alludes to nukes:

"What?" said Minerva. She had heard of guns, of course, but they weren't that dangerous to an experienced witch -

Maybe then Minerva thinks back, and remembers that nobody would explain to her exactly why Japan surrendered, as though what had happened was something even more terrible than a war...

I had been assuming that the third-floor corridor was just a way to keep young Gryffindors distracted. Surely even Dumbledore wouldn't be daft enough to entice the Dark Lord into a school. But Quirrell seems to think it's of interest. Confusing...

One thing that I found interesting but that I haven't noticed anyone else mention.

In chapter 76, we have:

But, as Hermione had explained to Millicent, prophesying wasn't controllable, there was no way to ask for a prophecy about anything in particular. Instead (the books had said) there was a sort of pressure that built up in Time, when some huge event was trying to happen, or stop itself from happening. And seers were like weak points that let out the pressure, when the right listener was nearby. So prophecies were only about big, important things, because only that generated enough pressure; and you almost never got more than one seer saying the same thing, because afterward the pressure was gone. And, as Hermione had further explained to Millicent, the seers themselves didn't remember their prophecies, because the message wasn't for them. And the messages would come out in riddles, and only someone who heard the prophecy in the seer's original voice would hear all the meaning that was in the riddle. There was no possible way that Millicent could just give out a prophecy any time she wanted, about school bullies, and then remember it, and if she had it would've come out as 'the skeleton is the key' and not 'Susan Bones has to be there'.

But in chapter 63, we have:

Final Aftermath:

She came awake with a gasp of horror, a disruption of her breathing that left her feeling deprived of air and yet her lungs didn't move, she woke up with an unvoiced scream on her lips and no words, no words came forth, for she could not understand what she had seen, she could not understand what she had seen, it was too large for her to encompass and still taking shape, she could not put words to that formless shape and so she could not discharge it, could not discharge it and become innocent and unknowing once more.

"What time is it?" she whispered.

Her golden jeweled alarm clock, the beautiful and magical and expensive alarm clock that the Headmaster had given her as a gift upon her employment at Hogwarts, whispered back, "Around two in the morning. Go back to sleep."

Her sheets were soaked in sweat, her nightclothes soaked in sweat, she took her wand from beside the pillow and cleaned herself up before she tried to go back to sleep, she tried to go back to sleep and eventually succeeded.

Sybill Trelawney went back to sleep.

This aftermath was widely considered to have been Trelawney giving a prophesy. However, as we just found out (assuming that the information Harry and Hermione gathered is accurate) that prophesies aren't given, the pressure doesn't get released, unless the right person is nearby. However, Trelawney appeared to be alone in that aftermath. This opens a number of different options.

• The information from the books is wrong.
• Trelawney was not as alone as she appeared.
• The speculated recording spells count as being the right nearby listener. Interestingly, this could mean that Dumbledore isn't the right listener, if others also have recording or listening spells around Trelawney.
• Trelawney wasn't actually giving a prophesy. The first time I read it, I thought that she "couldn't discharge it," and then it did discharge but didn't realize, because she could never remember her prophesies. But with this new information, that suggests to me that perhaps all of the pressure was building and building, but it was unable to vent itself at that time because the right person wasn't there. If this prophesy is similar to the one in canon, then that means it won't express itself until she's near Harry Potter.

Does anyone else see anything that I missed?

We haven't seen anything of Madam Pince in MOR, have we? You'd think Harry would make a point to talk to the magical librarian. Come to think of it, she might be Hat and Cloak. Although not if H&C = Santa Clause.

Next Omake: The Rationalist's Guide to the Galaxy.

"Oh, the little fiddly things?" said Dumbledore. "They came with the Headmaster's office and I have absolutely no idea what most of them do. Although this dial with the eight hands counts the number of, let's call them sneezes, by left-handed witches within the borders of France, you would not believe how much work it took to nail that down."

Chapter 17.

I know it's supposed to be a joke, but.... How? Is Dumbledore monitoring every wizard and witch's sex life? And how did he manage to crunch that data? Do wizards have calculating machines?

Or maybe he meant to say "the documentation took a lot of work to find and decipher"?

ETA: If it was Rowling writing this, the 'device with the golden wibblers' mentioned in the very next sentence would become a major plot point later in the series.

It seems that Akinator doesn't recognise any HPMOR characters.

This sounds like a job for a few procrastinators with a weekend to spare.

"Status update, Jan 19 2012: Now working on Ch. 81. I think I'd really better finish at least Ch. 81 before posting Ch. 78, due to the number of backward edits I've been making, and the extent to which they form a dramatic unity that should be posted regularly/predictably after the first chapter hits."

Well, it's nice that we didn't need to ask for a progress update. About how long might 81 turn out to be?

Something I just noticed from Ch. 55:

Amelia Bones: "Someone would burn for this."

Did Amelia Bones burn Narcissa Malfoy?

It occurs to me that a Pensieve would be a powerful tool for dealing with any of the Newcomblike problems that have come up so far or are likely to come up in the future -- getting past the magic mirror, for example. Just extract any memories relating to debiasing that you might have, put them in a jar labeled do not open until Christmas, and go talk to whatever the Omega of the moment is.

Might not work like that in practice -- I wouldn't expect it to IRL, at least, since scrubbing a memory probably wouldn't get rid of the weightings that have grown around the concepts it links to. But there's enough story potential that I can see a case for handwaving that away. Starting with the potential value stability problems...

For whatever reason, I didn't make this connection until now.

Prediction about Quidditch and the House Cup:

Dhveery znavchyngrf Enirapynj naq Fylgureva gb fpber whfg gur evtug ahzore bs cbvagf va gur svany tnzr gb znxr gur Ubhfr Phc n gvr. Guvf vf znqr cbffvoyr ol gur tnzr raqvat ng n cerqrsvarq gvzr.

Caveat:

Gur Ubhfr Phc vf njneqrq ng gur raq bs gur fpubby lrne, juvpu vf cebonoyl abg vzzrqvngryl nsgre gur ynfg Dhvqqvgpu tnzr. Nf jryy, vs Fylgureva naq Enirapynj unir hardhny fpberf orsber tbvat vagb gur tnzr, boivbhfyl n gvr vf gur jebat erfhyg.

I tried putting the HTML for MoR on an eReader, and the paragraph breaks disappeared, making the story seem like the hectic ravings of a madman on speed.

Some of the paragraph breaks are rendered by the Kobo eReader as paragraph breaks. But looking at the HTML, I can't figure out what the rule is. Does anyone know?

(P.S. - Do not buy a Kobo eReader.)

Something I've been trying to puzzle out for the past day, and failing. From Chapter 39, as Harry is talking to Dumbledore:

"The obvious test to see if the Resurrection Stone is really calling back the dead, or just projecting an image from the user's mind, is to ask a question whose answer you don't know, but the dead person would, and that can be definitely verified in this world. For example, call back -"

Then Harry paused, because this time he'd managed to think it through one step ahead of his tongue, fast enough to not say the first name and test that had sprung to mind.

Who was the first name (and test) that had sprung to Harry's mind? The quick rejection implies it would be something that would make Dumbledore think he is evil, or reveal to Dumbledore that Harry has some information that Harry doesn't want Dumbledore to know he has, or emotionally wound Dumbledore. And yet the shade would also have knowledge that no one alive would know, but the dead person would, and could be tested in the real world.

Things that have recently happened and might be on the tip of Harry's mind: Harry had a mysterious confrontation with Lucius Malfoy on platform 9.75, has met Neville's grandmother, and has discussed with Dumbledore what mischief Quirrell could unleash if he tricked the Headmaster into letting a Dementor onto the school grounds. They've also discussed immortality and afterlives (with some focus on Harry's parents).

Any guesses? I have a couple, but they seem quite weak to me.