benelliott comments on Case Study: the Death Note Script and Bayes - Less Wrong

25 Post author: gwern 04 January 2013 04:33AM

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Comment author: benelliott 09 January 2013 12:57:42AM 3 points [-]

On thing that struck me, using Bayes separately on all those pieces of evidence assumes independance, but it seems that conditioning on it being a fake, lots of the observations used as evidence all correlate with the faker being generally competent and fastidious, e.g. the sort of person who would get the address right is more likely to also get the authorship, formatting, PDF software and timezone right.

Comment author: gwern 09 January 2013 02:16:51AM 0 points [-]

That was pointed out in the essay two or three times, and has already been mentioned in the comments here as well.

Comment author: benelliott 09 January 2013 02:48:26AM 0 points [-]

Ah, sorry about that. Should have read the footnotes.

Comment author: gwern 09 January 2013 02:57:53AM 0 points [-]

Well, it was also towards the end as part of a list of reasons to not believe the final estimate.

Comment author: benelliott 09 January 2013 12:46:20PM 0 points [-]

That mentions there are 'reasons' to believe they might be correlated, still might have been worth my while to mention one such reason had that been all there was.