Harry Potter and the Methods of Rationality discussion thread, part 16, chapter 85

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The next discussion thread is here.

This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 85. The previous thread has long passed 500 comments. Comment in the 15th thread until you read chapter 85.

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: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15.

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Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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.

The next discussion thread is here.

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Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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.

Chapter 23:

If Harry is correct about how magic is inherited, this idea can bring some interesting issues in future chapters. Short resume of Harry's idea: there are recessive magic gene (M) and dominant non-magic gene (N). Magic users have two magic genes (MM), and pair of them are needed to work with magic. Squibs have one magic gene (MN) and muggles have two non-magic genes (NN) all of them can't do magic.

First, how squibs appears? Actually people with MN genes can live between muggles because muggle-borg wizards and witches are born from parents with MN genes. But let's just do not call them squibs. Real squibs are born from couples of witch and wizard and both parents have MM genes. N gene can appear here as a result of mutation only.

Second, half-breeds exist. Magic-users can have children from giants, goblins, veela and, possibly, some other creatures. These half-breed can use magic, and there are two possibilities: they have MM genes or they have some m gene. m gene should be recessive gene, when appears with M gene, because according to HP wiki all known half-breeds can use magic. So half-breeds have MM or Mm genes.

What can Harry do with all these things? He can come with some eugenic proposal how to increase number of wizards, this may even help to make relationship with Lucius better. He can just find this M gene and connect it to the source of magic. But I'm not sure, that Harry will have time for all these, he may have more important goals. I hope he can delegate some of these studies to somebody else, for example, to Draco.

By the way, can Polyjuiced person become pregnant and give birth?

I dimly recall that in canon, Squibs are actually the children of two wizards. That contradicts Harry's finding directly.

But then Rowling probably didn't have any rules in mind about how magic inherits, so it might be impossible to come up with a good theory that explains everything we know from canon.

2fubarobfusco14y

Canon has Hagrid and Maxime (half-giant), Fleur and Gabrielle (one-quarter veela), and Filius Flitwick (part goblin). Veelas and goblins use forms of magic, but giants don't. That may be not because giants lack the genetic ability, but because they lack the attention or intelligence to learn how to make use of it, though. Goblins appear to have intelligence around human level, but use magic differently from witches and wizards. Other species noted for using their own flavors of magic include house-elves and centaurs. There aren't any part-house-elf or part-centaur characters in canon or HPMoR, though.