Relatively also implies the lack of absolute time—it doesn’t make sense to speak of “before” or “faster” or “now” in absolute. What matters for pleasure/pain of sentient entity is relative to their frame of reference, their subjective time.
And while observers in different frames will disagree on “what time is it ?” they will agree on the subjective experience each person has. And the only way to “sum” the pain/happiness between difference frames of inertia is considering when they can mutually agree on something—when the signal from one can reach the other.
If person A is on Earth suffering and person B is on a spaceship in happiness, it only matters to sum the suffering of one with the happiness of the other when a signal from Earth towards the ship (or vice-versa) can reach its destination, and you’ll find that doing all the calculation the prediction of the two frames will be the same.
The only point where this can be tricky is if the ship goes beyond our event horizon—if due to expanding universe it reach the point where it can’t reach Earth anymore because it’s going away from it faster than light. There I’ve to admit it makes knots in my head.
Relatively also implies the lack of absolute time—it doesn’t make sense to speak of “before” or “faster” or “now” in absolute. What matters for pleasure/pain of sentient entity is relative to their frame of reference, their subjective time.
And while observers in different frames will disagree on “what time is it ?” they will agree on the subjective experience each person has. And the only way to “sum” the pain/happiness between difference frames of inertia is considering when they can mutually agree on something—when the signal from one can reach the other.
If person A is on Earth suffering and person B is on a spaceship in happiness, it only matters to sum the suffering of one with the happiness of the other when a signal from Earth towards the ship (or vice-versa) can reach its destination, and you’ll find that doing all the calculation the prediction of the two frames will be the same.
The only point where this can be tricky is if the ship goes beyond our event horizon—if due to expanding universe it reach the point where it can’t reach Earth anymore because it’s going away from it faster than light. There I’ve to admit it makes knots in my head.