There you go again, arrogance is quite common in PhD students, fortunately they usually get over it, I'm sure you will too.
What I am trying to point out tho is the contradiction here, I've seen numerous answers to this problem which merely try to avoid the issue or cloud the issue, by pages of...
I don't think you are allowed to say that a frame is "stationary", so you also cannot say that the two frames know they are traveling faster than the common frame. They might consider themselves to be stationary and the common frame moving away from them.
OK, except arent you treating the Earth as being "at rest". As far as I can see when the spaceship is traveling away from the Earth at a constant speed, you are equally entitled to say the Earth is moving away from the spaceship at constant speed, and the spaceship is stationary, so clocks on...
Except it is possible to visualise a situation where they both experience exactly the same accelerations (but at different times) before returning to their starting point. One has traveled further from the starting point than the other before returning. So during their periods of relative...
Oh dear! no need to be so defensive because you can't answer a simple question
I note that you still haven't answered it:-)
I have just been looking at some of your replies so far:-
>In fact, you can even resolve the whole thing - accelerations and all - >with just SR. It's in one of the...
The question was which one ages slower
I see a lot of irrelevant complications and no answer to my question
I suspect that Relativity is unable to distinguish between the two in any meaningful way
I have never seen any argument (including Einsteins) which could justify choosing one over...
speed relative to what?
they are both traveling at the same speed relative to each other
In the example I gave they have both experienced the same acceleration forces (but at different times), and have ended up together at the same point at which they started.
How do you choose which one...
Mmmmmhhhh
So can someone tell me which one is older when they have both experienced identical accelerations on their journeys, but at different times?
---Steve
So which one is older, when they return to the same time frame?
Remembering that the traveling twin will experience identical accelerations/decelerations in returning to Earth as the twin who originally returned to earth. The traveling twin will just spend longer in the uniform states of...