Harry Potter and the Methods of Rationality discussion thread

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Update: Please post new comments in the latest HPMOR discussion thread, now in the discussion section, since this thread and its first few successors have grown unwieldy (direct links: two, three, four, five, six, seven).

As many of you already know, Eliezer Yudkowsky is writing a Harry Potter fanfic, Harry Potter and the Methods of Rationality, starring a rationalist Harry Potter with ambitions to transform the world by bringing the rationalist/scientific method to magic. But of course a more powerful Potter requires a more challenging wizarding world, and ... well, you can see for yourself how that plays out.

This thread is for discussion of anything related to the story, including insights, confusions, questions, speculation, jokes, discussion of rationality issues raised in the story, attempts at fanfic spinoffs, comments about related fanfictions, and meta-discussion about the fact that Eliezer Yudkowsky is writing Harry Potter fan-fiction (presumably as a means of raising the sanity waterline).

I'm making this a top-level post to create a centralized location for that discussion, since I'm guessing people have things to say (I know I do) and there isn't a great place to put them. fanfiction.net has a different set of users (plus no threading or karma), the main discussion here has been in an old open thread which has petered out and is already near the unwieldy size that would call for a top-level post, and we've had discussions come up in a few other places. So let's have that discussion here.

Comments here will obviously be full of spoilers, and I don't think it makes sense to rot13 the whole thread, so consider this a spoiler warning: this thread contains unrot13'd spoilers for Harry Potter and the Methods of Rationality up to the current chapter and for the original Harry Potter series. Please continue to use rot13 for spoilers to other works of fiction, or if you have insider knowledge of future chapters of Harry Potter and the Methods of Rationality.

A suggestion: mention at the top of your comment which chapter you're commenting on, or what chapter you're up to, so that people can understand the context of your comment even after more chapters have been posted. This can also help people avoid reading spoilers for a new chapter before they realize that there is a new chapter.

Chapter 28: I wonder what happens if Harry realizes he's living in fiction, and everything he's dealing with is made of concepts rather than atoms.

An interesting thought... I think Harry should actually be pleased with that discovery. Given everything he knows about fictional realities and his observations thus far about the HP universe he should be more confident in his ability to achieve godhood. DND is a system that has gone through versions, with a strong motivation for making it ungamable, but there are still loopholes.

I think you underestimate Harry's will to power. He was working on a cure for Alzheimer's, but are there really people with Alzheimer's in his home universe? As many as there are here?

0Kevin16y

I think that kind of thing might have to wait until Harry is 15. I'll be surprised if there isn't a many year skip ahead in the next 25 chapters of the story.

13JenniferRM16y

Since around Chapter 20 this is actually my guess for the entire basis of magic that Eliezer is working from. That is... there's a jumble of ideas and tropes that are invented and sequentially stolen by one author after another. Someone tells stories of Vlad Tepis, Bram Stoker comes along... and N iterations later you've got Twilight with vampires having extra chromosomes and clairvoyance. To understand a magical universe at the deepest level is to see the hands of previous authors influencing your physics and history (and possibly your future if you are in a prequel) plus a "current author" who has a measure of finer grained control over things like plotting and characterization - limited by the audience's willingness to play along. If this theory of magic is right, rationality in a magical universe should lead you to to become genre-aware, and then the next obvious(?) thing is to go meta genre-aware and start trying to "genre hack" your universe and see if you can "tunnel" into the derivative works (or maybe just get the author to fall in love with you or something). My current working theory is that Dumbledore as figured out a rough outline of these "magical physics" and has been actively manipulating his reality for decades, with the goal of setting up pre-conditions that could create "authorial change" and/or to make a certain story easy to tell given the facts. The more pointed goal is to cause his universe would branch at a "point of interest" in a direction that, according to fictional tropes, is more likely to be to his own liking. Based on his revelation about pranking Harry's mother, I've got a (totally unnecessarily detailed) hypothesis about what he may have done to create initial conditions for Harry Potter something like 20 or 30 years before the present story (including setting up an abusive adoptive environment) that got Rowling to pick up the canon universe and give him a victory there. In the meantime, if the theory is true, the deeper questi

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