Eliezer_Yudkowsky comments on Harry Potter and the Methods of Rationality discussion thread, part 17, chapter 86 - Less Wrong

9 Post author: Alsadius 17 December 2012 07:19AM

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Comment author: Tenek 19 December 2012 04:54:24PM *  5 points [-]

On further consideration of the Moody fight - as soon as Harry walked into the office, shouldn't he have seen all his invisible copies as well? Ch. 56 -

Bellatrix was still transparent within the Cloak, but to Harry she was no longer hidden, he knew that she was there, as obvious to him as a Thestral. For Harry had only loaned his Cloak, not given it; and he had comprehended and mastered the Deathly Hallow that had been passed down through the Potter line.

Comment author: Eliezer_Yudkowsky 22 December 2012 04:27:37AM 3 points [-]

Hah, I wondered if someone would ask that. I reply that seeing through the Cloak is a 'requires concentration' ability. Harry deliberately doesn't concentrate before going back in time, because he doesn't want to fix anything via knowledge so as to leave himself freedom of action.

Comment author: NihilCredo 22 December 2012 05:29:01AM *  5 points [-]

I would say a small edit is probably in order, because "as obvious to him as a Thestral" definitely doesn't come across as an ability that requires any concentration.

But I think Karl's explanation is a much better one and should be canonical.

Comment author: Eliezer_Yudkowsky 22 December 2012 05:29:59AM 2 points [-]

Fair point.