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

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

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Comment author: orthonormal 25 July 2010 05:23:48PM 3 points [-]

July 25 (after Chapter 32, prediction for Chapter 33):

SHA-1: f5721b3c6010973ee195dc160d0679477401a3df

Comment author: JoshuaZ 25 July 2010 05:27:14PM 5 points [-]

SHA-1: f5721b3c6010973ee195dc160d0679477401a3df

Copying here to verify lack of editing in future.

Comment author: orthonormal 01 August 2010 06:05:29AM 1 point [-]

Translation:

End of 32 only listed 3 options for Zabini. The fourth creates a 3-way tie. Zabini shoots himself as traitor.

Comment author: gwern 01 August 2010 07:36:16AM 1 point [-]
 [03:35 AM] 215Mb$ echo "End of 32 only listed 3 options for Zabini. The fourth creates a 3-way tie. Zabini shoots himself as traitor." | sha1sum 09a3ee331d8900b7b7475b0a89911207672cbbda -
Comment author: ata 01 August 2010 09:10:10AM 3 points [-]

Try echo -n.

Comment author: gwern 01 August 2010 11:44:00AM 0 points [-]

Ah, you're right. I forgot echo appends a newline by default.

Comment author: rhollerith_dot_com 01 August 2010 09:47:50AM *  0 points [-]

When the -n flag is added to the echo command (as suggested by ata) the hash matches.

So, unless orthonormal has exploited a security vulnerability on the Less Wrong server, orthonormal has expended a costly number of computing cycles to defeat the purpose of the hash function, I misunderstand the cryptographic guarantees provided by the hash function, or something equally unlikely, orthonormal really did write the following back on 25 July:

End of 32 only listed 3 options for Zabini. The fourth creates a 3-way tie. Zabini shoots himself as traitor.

Comment author: gwern 01 August 2010 11:43:41AM 2 points [-]

Erm, yeah. I thought we all understood the hash scheme.