A spell to grade tests is probably not an old spell that's been around forever since no one else seems to use it, but QQ may have invented it for this purpose.

Either way, it's existence is a further hint to the nature of magic in the world of HPMOR. It involves some pretty sophiscated natural languge processing. The fact that magic can do natural language processing is hinted as significant in chapter 6 while Harry is studying the retrieval charm and trying diffent phrases that point to "bag of gold". If we knew how magic could read a test and p... (read more)

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"an incredible spell... is it not?"

A few students on the Ravenclaw side were looking indignant, but for the most part the students just looked relieved, and some Slytherins were chuckling.

Quirrell is joking. He doesn't care about the results of the ministry-mandated test, as he already knew what grades his students had earned from him regardless.

1Jiro5yIf you accept the definition of the supernatural as a physical law that applies to ontologically basic mental things [http://lesswrong.com/lw/4xt/the_supernatural_category/3r7d], then finding the answers to a test would seem to be something the supernatural can do without having to do natural language processing, the same way a spell can turn someone into a frog without having to process DNA. We think of "the answers to a test" as a concept.
15Phothrism5yThere's a much simpler explanation: The tests came pre-graded and QQ just cast a spell to reveal the invisible grades and ignored all the answers.

Harry Potter and the Methods of Rationality discussion thread, January 2015, chapter 103

by b_sen 1 min read29th Jan 2015174 comments


New chapter, and the end is now in sight!

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 103.

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:

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.