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topynate comments on Counterfactual Mugging - Less Wrong
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You've actually made it an easier problem for me, though, because I regard my alternate selves as other people.
How do you peak the threshold, decide that [$10000] < [decision threshold] < [your life]?
If it were possible for me to make a deal with my alternate self by which I get a few thousand dollars, I would obviously surrender my $100. As it isn't possible, I see little reason to give someone otherwise destined to be forever causally isolated from me $10000 at the cost of $100. I wouldn't keep $100 if it meant he lost $10000, either. I probably would keep the $100 if they lost less than $100. If my alternate self stood to gain, say, a million dollars, but nothing if I kept my $100, then I probably would give it up. But that would be as a whimsy, something to think about and feel good. But the benefit to me of that whimsy would have to be worth more than $100.
The pattern behind my choices is that the pain experienced by my alternate self (who, recall, I consider a different person) in any of these cases is never more than $100. I think this is the most we can expect, on average, of other intelligent beings: that they will not inflict a large loss for a small gain. Why not steal, in that case? Because there is, in fact, no such thing as total future causal isolation.
There is no alternative self. None at all. The alternative may be impossible according to the laws of physics. It is only present in your imperfect model of the world. You can't trade with a fiction, and you shouldn't emphasize with a fiction. What you decide, you decide in this our real world. You decide that it is right to make a sacrifice, according to your preferences that only live in your model of the world, but speak about the reality.
I've misunderstood you to an extent, then.
My preferences don't involve me sacrificing unless someone can get hurt. It doesn't matter whether that person exists in another Everett branch, within Omega or in another part of the Tegmark ensemble, but there must be a someone. I'll play symmetrist with everyone else (which is, in a nutshell, what I said in my comment above) but not with myself. You seem to want a person that is me, but minus the "existence" property. I don't think that is a coherent concept.
OK, suppose that Omega came along right now and said to me "I have determined that if you could be persuaded that your actions would have no consequence, and then given the problem you are currently discussing, you would in every case keep $100. Therefore I will torture you endlessly." I would not see this as proof of my irrationality (in the sense of hopelessly failing to achieve my preferences). I don't think that such a sequence of events is germane to the problem as you see it, but I also don't see how it is not germane.