In Ch 45, Harry thinks:
I comprehend your nature, you symbolize Death, through some law of magic you are a shadow that Death casts into the world.
If this is true, it's possible that as long as death exists (for wizards, anyway), it will continue to cast its shadows, and so the dementors can never be all destroyed. Maybe they'll just respawn or something. In fact, maybe when Harry destroyed that one in Ch 45, a dementor respawned back at Azkaban without anyone noticing. Do the guards keep a count of dementors?
Dementors don't act like death incarnate, though. Death isn't reactive to human expectations and sensibilities. Death doesn't go out of its way to try to destroy people. Death is just a force of nature (or, rather, the point at which a force of nature terminates). Dementors act like a superstitious anthropomorphization of death.
We also know that there is a dark ritual that summons Death, which Quirrel knows but is afraid to perform.
We know, too, that spells modify reality based on the caster's understanding of the natural world, rather than using the most ...
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 81, which should be published later today. The previous thread passed 400 comments as of the time of this writing, so it will pass 500 comments soon after the next chapter is posted, if not before. I suggest refraining from commenting here until chapter 81 is posted; comment in the 12th thread until you read chapter 81. After chapter 81 is posted, I suggest all discussion of previous guesses be kept here, with links to comments in the previous thread.
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.) When posted, chapter 81 should appear here.
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: one, two, three, four, five, six, seven, eight,nine, ten, eleven, twelve.
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: