Take a look at this following paragraph that i wrote in another thread "think of two rockets moving at each other under inertia at a course so that they pass very close. Observer A will look at both clocks when the rockets pass. he will see his own as being T and he will see observer B,s clock as being .5T ..........Observer B will see his clock as being T and he will see Observer A's clock as being .5T ... That being said.. if both rockets accelerate the same amount so as to come to rest beside each other, during the acceleration each will see the others clock run faster than his own and at the point they come to rest both clocks should read the same time." It seem that this would be true because they both underwent the same events. If its NOT true then both observers would look at observer A's clock and argue where the minute hand is, one would see it on one place and one would see it in another. IF IT IS TRUE: then the amount of distance the rockets are apart when they sync their clocks, will greatly affect the amount the opposite observers clock would have to speed up during the "acceleration to rest" in order to make the clocks back in sync upon coming to rest with each other.