I think that the selfishness and altruism concepts are well captured by utility here. All that is needed for, say, the second model, is that the dead guy derives utility from the survivor betting that they’re in a single-person universe.
Altruism was the easiest way to do this, but there are other ways—maybe the money will be given to a charity to prevent the death of hypothetical agents in thought experiments or something (but only if there is a death). Or you could cast it in evolutionary terms (the pair share their genes, and there won’t be enough food for two, and the agents are direct gene-maximisers).
The point is that I’m using a clear utility, and using selfishness or altruism as a shorthand to describing it.
I think that the selfishness and altruism concepts are well captured by utility here. All that is needed for, say, the second model, is that the dead guy derives utility from the survivor betting that they’re in a single-person universe.
Altruism was the easiest way to do this, but there are other ways—maybe the money will be given to a charity to prevent the death of hypothetical agents in thought experiments or something (but only if there is a death). Or you could cast it in evolutionary terms (the pair share their genes, and there won’t be enough food for two, and the agents are direct gene-maximisers).
The point is that I’m using a clear utility, and using selfishness or altruism as a shorthand to describing it.