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.

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.

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 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.

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.

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?

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. :)

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" :-)

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.

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.