perfect deterministic software twins, exposed to the exact same inputs. This example that shows, I think, that you can write on whiteboards light-years away, with no delays; you can move the arm of another person, in another room, just by moving your own.
In this situation, you can draw a diagram of the whole thing, including all identical copies, on the whiteboard. However you can’t point out which copy is you.
In this scenario, I don’t think you can say that you are one copy or the other. You are both copies.
There could be external information you and your copy are not aware of that would distinguish you two, e.g. how far different stars appear, time since the big bang. And we can still talk about things outside Hubble volumes. These are mostly relational properties that can be used to tell spacetime locations apart.
Any two identical things could be distinguished by their spacetime locations...while still being identical in their own intrinsic properties. Basically , space.and time are what allow numerical.non-identity in spite of qualitative identity.
In this situation, you can draw a diagram of the whole thing, including all identical copies, on the whiteboard. However you can’t point out which copy is you.
In this scenario, I don’t think you can say that you are one copy or the other. You are both copies.
There could be external information you and your copy are not aware of that would distinguish you two, e.g. how far different stars appear, time since the big bang. And we can still talk about things outside Hubble volumes. These are mostly relational properties that can be used to tell spacetime locations apart.
Any two identical things could be distinguished by their spacetime locations...while still being identical in their own intrinsic properties. Basically , space.and time are what allow numerical.non-identity in spite of qualitative identity.