Nick_Tarleton comments on Newcomb's Problem standard positions - Less Wrong

5 Post author: Eliezer_Yudkowsky 06 April 2009 05:05PM

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Comment author: Nick_Tarleton 06 April 2009 07:28:02PM 1 point [-]

To screw with such an Omega, just ask a different friend who knows you equally well, take their judgement and do the reverse.

I believe this can be made consistent. Your first friend will predict that you will ask your second friend. Your second friend will predict that you will do the opposite of whatever they say, and so won't be able to predict anything. If you ever choose, you'll have to fall back on something consistent, which your first friend will consequently predict.

If you force 2F to make some arbitrary prediction, though, then if 1F can predict 2F's prediction, 1F will predict you'll do the opposite. If 1F can't do that, he'll do whatever he would do if you used a quantum randomizer (I believe this is usually said to be not putting anything in the box).

Comment author: cousin_it 06 April 2009 08:15:43PM *  1 point [-]

You have escalated the mystical power of Omega - surely it's no longer just a human friend who knows you well - supporting my point about the quoted passage. If your new Omegas aren't yet running full simulations (a case resolved by indexical uncertainty) but rather some kind of coarse-grained approximations, then I should have enough sub-pixel and off-scene freedom to condition my action on 2F's response with neither 1F nor 2F knowing it. If you have some other mechanism of how Omega might work, please elaborate: I need to understand an Omega to screw it up.