“Other”: The nature of physics has a strong possibility of being such that the question makes no sense.
Same other, but with the nuance that there is probably a refinement of the question that does make sense.
A rough, likely wrong attempt at a refinement:
B’-time: as before, but with a partial order of events;
A’-time: as before, but with the extra data coming from any observer who can specify those events that conclusively are in their past or future.
“Other”: The nature of physics has a strong possibility of being such that the question makes no sense.
Same other, but with the nuance that there is probably a refinement of the question that does make sense.
A rough, likely wrong attempt at a refinement:
B’-time: as before, but with a partial order of events;
A’-time: as before, but with the extra data coming from any observer who can specify those events that conclusively are in their past or future.