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.

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Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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

So after thinking about it some more, I came up with a possible rationale/rationalization why a wizard's death might be needed.

Assume the "script kiddy magic" theory is right - A powerful wizard can be bind complex magic into a simple to execute script, with a key phrase (and/or emotion or gesture). Thus it wasn't some perverse law of the universe that decided "Wingardium Leviosa" is how levitation is activated, but some perverse ancient wizard.

A Horcrux stores an image of you, and the activation sequence is bound to the death of a wizard. It was meant to be an emergency backup script, activated on the death of the wizard. I.e. the ancient who created it was thinking that when a wizard dies, they would automatically be backed up into a Horcrux. This explains where ghosts come from, and why the ghosts we know of were all wizards. Later, someone figured out how to activate the script without dying. Unfortunately, the method they discovered involved killing another wizard.

A backup is limited by the hardware that runs it, so ghosts, which can only barely be said to run, don't seem like real people. They have limited ability to form new memories, so they seem more like chatbots than people (in the MoR universe). A Horcrux is even more limited unless it can get near a brain, but has some "upload" magic associated which means it can possess people under the right circumstances. Harry could be a Horcrux, in the sense that he might contain a backup image of Voldemort, but it can't (normally) run for much the same reason Voldemort can't cast a spell on Harry. That's why the hat didn't sense it.