DanielLC comments on Avoiding doomsday: a "proof" of the self-indication assumption - Less Wrong

18 Post author: Stuart_Armstrong 23 September 2009 02:54PM

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Comment author: Eliezer_Yudkowsky 23 September 2009 09:12:17PM 7 points [-]

I was thinking the Doomsday Argument tilted the evidence in one direction, and then the SIA needed to tilt the evidence in the other direction

Correct. On SIA, you start out certain that humanity will continue forever due to SIA, and then update on the extremely startling fact that you're in 2009, leaving you with the mere surface facts of the matter. If you start out with your reference class only in 2009 - a rather nontimeless state of affairs - then you end up in the same place as after the update.

Comment author: DanielLC 12 April 2011 07:31:17PM 0 points [-]

If you start out certain that humanity will continue forever, won't you conclude that all evidence that you're in 2009 is flawed? Humanity must have been going on for longer than that.