Manfred comments on Harry Potter and the Methods of Rationality discussion thread, part 25, chapter 96 - Less Wrong

6 Post author: NancyLebovitz 25 July 2013 04:36AM

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Comment author: DubiousTwizzler 25 July 2013 03:51:35PM *  3 points [-]

The one with the power to vanquish the Dark Lord approaches... born to those who have thrice defied him, born as the seventh month dies... And the Dark Lord shall mark him as his equal. But he shall have power the Dark Lord knows not... and either must destroy all but a remnant of the other, for those two different spirits cannot exist in the same world. - chapter 86

Oddly, I feel like each line in this prophecy could equally well point to Dark Lord as Voldemort OR Dark Lord as Death.

Although P(Dark Lord as Death) should get a complexity penalty since Voldemort should be the default candidate due to canon.

EDIT: The last sentence is wrong. What I should've said is that since Voldemort is the prophecy's referent in canon, and he is called the Dark Lord in both canon and hpmor, I'm still assigning >50% probability to Quirrellmort being the entity referred to in hpmor's prophecy.

Comment author: Manfred 25 July 2013 04:47:46PM 14 points [-]

complexity penalty

This is a misuse of jargon.

Comment author: DubiousTwizzler 25 July 2013 05:21:12PM 2 points [-]

Since it seems like these two explanations fit this specific piece of evidence (roughly) equally well, and we know that Quirrelmort is the entity referenced by the prophecy in canon, and that Voldemort is called the Dark Lord in both canon and hpmor, then why wouldn't Dark Lord as Death get a 'complexity penalty'?

If I'm using it wrong, please explain.

Comment author: Manfred 25 July 2013 05:30:18PM 12 points [-]

Complexity means it requires additional things to happen even if you had no evidence.

For example, a more complex hypothesis than "Bob is a human" is "Bob is a human who lives at 123 Fake St."

Voldemort being called the dark lord is evidence, and learning about new evidence does not itself make a hypothesis more or less complex. It's just evidence.

Comment author: DubiousTwizzler 25 July 2013 05:41:54PM 11 points [-]

You're right. Thanks for the correction!

Comment author: ThisSpaceAvailable 27 July 2013 05:54:45AM 0 points [-]

You seem to be saying "A is more complex than B means 'if A then B' ", which is not true. The commonly used term for this is "strength". "Bob is human who lives at 123 Fake St." is strictly stronger than "Bob is human".