#### Mike_Fontenot

**Registered Senior Member**

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But one thing that is important to keep in mind is that in the purely SR scenario, her clock never runs backwards according to her, and she never gets younger. It is only his reckoning of the time her clock currently shows, and his reckoning of what her current age is that changes, and only because his line of simultaneity changes.

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Regardless of all that, if you have found a way to use gravitational equations to obtain the same results that we get from SR (i.e. the CMIF method), then I think that is great.

Obviously, the distant twin (she) doesn't suddenly feel like she's getting younger. At each instant in her life, her brain is in a state that is different from all of her other brain states. Nothing can change those states. But the accelerating observer DOES conclude that she instantaneously gets younger when he instantaneously changes his velocity in the direction away from her. And so, FOR HIM, she ACTUALLY does get younger. She doesn't agree. And all other perpetually-inertial observers, who are momentarily co-located with him when he instantaneously changes his velocity, disagree with him about her getting younger when he instantaneously changes his velocity, but they also all disagree AMONG THEMSELVES about what her current age is when the accelerating observer changes his velocity. And FOR EACH OF THEM, she ACTUALLY has the current age they compute, ACCORDING TO THEM. That's just the way special relativity IS ... different observers disagree, and they each think they are right, and none of them is wrong!

What is really new, though, in my latest results, is the fact that the accelerating observer can assemble an array of clocks (and attending "helper friends" (HF's)), which give him a "NOW" that extends throughout all space (analogous to what Einstein did for inertial observers). And THAT guarantees that the accelerating observer's conclusions about the home twin's age are fully MEANINGFUL to him. His conclusions agree with the CMIF simultaneity method, which means that the CMIF simultaneity method is the only correct simultaneity method.