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.
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.