Harry Potter and the Methods of Rationality discussion thread, part 21, chapters 91 & 92

NancyLebovitz

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 chapters 91 & 92 . The previous thread has passed 500 comments.

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, 16, 17,18,19,20.

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Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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

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Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).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

thestral blood was implied to have a role in the permanence of the Cloak

I know the blood is used to mark the Deathly Hallow symbol on the Cloak, but could you remind me where it says this relates to permanence? I rather assumed that, since thestrals are invisible to all those who have not seen and comprehended death, the relevance of thestral blood was to do with death and/or hiding from it.

the potion Petunia took was dangerous or rare (...) and a normal potion listed in the standard 5th year text presumably wouldn't be

I really really wish I could believe that, but I can't, not in the wizarding world. Felix Felicis, which is extremely difficult to make and disastrous if brewed wrong (and disastrously powerful when brewed right, especially in the hands of children), is to be found in the same textbook.

I know the blood is used to mark the Deathly Hallow symbol on the Cloak, but could you remind me where it says this relates to permanence?

Hmm, rereading the section of his Azkaban trip where Harry was making his Cloak related discoveries I seem to have confused the fact of the thestral blood symbol empowering the Cloak with someones conjecture in some discussion thread after we learned the law of potion conservation that the thestral blood suggested as a substitution in the eagle's splendor potion could have served as a modifier to make it permanent.