bentarm comments on Newcomb's Problem: A problem for Causal Decision Theories - Less Wrong

8 [deleted] 16 August 2010 11:25AM

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Comment author: bentarm 17 August 2010 11:35:11PM *  9 points [-]

Almost everyone I've tried it on has one-boxed. Even though I left out the part in the description about being a really accurate predictor, and pre-seeded the boxes before I even knew who would be the one choosing.

What?!? You offer people two boxes with essentially random amounts of money in them, and they choose to take one of the boxes instead of both? And these people are otherwise completely sane?

Could you maybe give us details of how exactly you present the problem? I can't imagine any presentation that would make anyone even slightly tempted to one-box this variant. (Maybe if I knew I'd get to play again one day...)

Comment author: Eliezer_Yudkowsky 18 August 2010 03:31:31PM 5 points [-]

That seems bizarre to me too. But if Jimrandomh is filling his boxes on the basis of what most people would do, and most people do one-box, then perhaps they are just behaving as rational, highly correlated, timeless decisionmakers.

Comment author: jimrandomh 18 August 2010 04:01:11PM 1 point [-]

A signalling explanation might explain this behavior: people would rather be seen as having gotten the problem correct, or signal non-greediness, than get an extra $0.25. As evidence for this conclusion, some people turn down the $1.00 in box one.

No one's given the real correct solution, which is "inspect the boxes more thoroughly". One of them has an extra label on the bottom, offering an extra $1.00 for finding it if you haven't opened any boxes yet, which I've never had to pay out on. The moral is supposed to be that theory is hard to transfer into the real world and to question assumptions.

Comment author: Alicorn 18 August 2010 04:17:02PM 4 points [-]

You let people inspect the boxes? Wouldn't they be distinguishable by weight?