Mass is neither created nor destroyed. It is moved.
Assuming you can tell if energy is conserved by checking if it’s still there later, when you have a time machine, is like claiming a bolder has violated mass/energy conservation because somebody broke a piece off.
None of what you wrote makes any sense to me, sorry.
Here’s how I read it:
Mass is neither created nor destroyed. It is moved.
Assuming you can tell if energy is conserved by checking if it’s still there later, when you have a time machine, is like claiming a bolder has violated mass/energy conservation because somebody broke a piece off.
The whole point is that in GR conservation is local, you should be able to trace the movement of mass through space.
Exactly. You were treating it as general.