What are you trying to argue in the great-grandparent? What am I supposed to take from the black cloaks, aside from the fact that it makes Dementors look like Death? I can imagine that perhaps Rowling chose this appearance because it allowed a frightening reveal later on. But that reveal uses the words "rotting", "death" and "deathly". On our first sight of a Dementor she also compares it to something "dead" and "decayed". She did this because fear of death seems near as universal as you can get. Dementors' most feared ability, destruction of the soul, has the same explanation.
The parallels that MoR!Harry sees are real, and they exist because death is (widely held to be) bad.
New chapter!
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 102.
There is 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.)
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: