It’s hard to tell whether thinking superrationally causes the convergence, or whether thinking in convergent ways causes a person to have more interest in superrationality, or whether causality is involved at all
I recommend reading the paper on Functional Decision Theory, to get an intuition on what an answer to this might look like. I think the question you’re interested in is whether we should think of our action as actually having an effect on observers in another universe (or world, in MWI). This might seem absurd if you have the intuition that you can only affect things that are causally dependent on your actions. But if you drop the assumption of causal dependence, you can say that their decision is subjunctivelydependent on yours.
I recommend reading the paper on Functional Decision Theory, to get an intuition on what an answer to this might look like. I think the question you’re interested in is whether we should think of our action as actually having an effect on observers in another universe (or world, in MWI). This might seem absurd if you have the intuition that you can only affect things that are causally dependent on your actions. But if you drop the assumption of causal dependence, you can say that their decision is subjunctively dependent on yours.
Sorry. That last bit about whether causality is involved at all was a little joke. It was bad. That wasn’t really what I was pondering.