RolfAndreassen comments on Harry Potter and the Methods of Rationality discussion thread - Less Wrong

34 Post author: Unnamed 27 May 2010 12:10AM

You are viewing a comment permalink. View the original post to see all comments and the full post content.

Comments (866)

You are viewing a single comment's thread. Show more comments above.

Comment author: RolfAndreassen 27 May 2010 05:23:10PM 7 points [-]

Read up to Chapter 21, commenting on chapter 2. Prediction about the physics of HP:MR.

Harry is mistaken about McGonagall's transformation into a cat breaking conservation of energy; indeed, it seems to me that he is not really putting a lot of effort into finding an alternative explanation, but jumping straight to "Everything I thought I knew was wrong". (Perhaps Lord Kelvin's not the only one who gets a charge out of not knowing something; after all Harry has been wanting to do Something Big, and the more laws of physics are broken, the better!) A simple hypothesis which does not break conservation of energy: Rather than McGonagall's human body literally turning into a cat, it is replaced by a cat-body from elsewhere in the universe. McGonagall's human brain continues to operate in its usual fashion (while being physically elsewhere), and this is turned into cat-brain commands by an AI somewhere in the interface. No mass (hence no energy) appears or disappears, there's just an exchange of objects.

Comment author: RolfAndreassen 27 May 2010 11:18:58PM 5 points [-]

In fact, come to think of it, wasn't there an experiment recently with remote-controlled rats, using plain Muggle science and electrodes in their brains? Extrapolate that forward fifty years and add those direct-to-brain conputer interfaces, and we could do something rather similar, given lots of training to get the feedback right. "When I think like this the rat goes that way..." An Animagus might learn this almost as a child learns to control its body.