Jesse, OK good, that's what I assumed you meant.

BUT now take the two twins at rest standing on opposite sides of the earth, and then they each start walking in different directions. By your criterion you then have to say that suddenly and instantly there is NO more 1:1 correlation of their ages, that they COMPLETELY AND ABSOLUTELY lose their 1:1 age correlation they had at rest even if they take a SINGLE STEP! The way you state it this is EITHER OR. Either there is a 1:1 at rest, but if they are NOT at rest in the very slightest amount then they COMPLETELY AND ABSOLUTELY lose any 1:1 age correlation. Now if you do NOT agree to that then you are forced to try to claim that it's a matter of degree then you have to come up with some mathematical function that tells us what VARYING AMOUNT of 1:1 age correlation holds with what amount of relative motion. What defines the degree of 1:1 age correlation or lack thereof? I certainly don't think relativity theory has any such function. For relativity it is absolutely either or. Is this not correct? Or, on the other hand if you use simple logic from my many proofs you just admit that any two twins ALWAYS have a 1:1 actual real proper age correlation in all situations. And that is is always unambiguously calculable in a manner that all observers agree to, but that is not in general observable. And this problem and all the other problems simply go away.... Which is it? Edgar On Sunday, March 2, 2014 7:13:31 PM UTC-5, jessem wrote: > > > On Sun, Mar 2, 2014 at 7:01 PM, Jesse Mazer <laser...@gmail.com<javascript:> > > wrote: >> >> No, of course I wouldn't agree that there is any unique "actual" truth >> about their ages in this case, nor would any mainstream physicist. >> > > Sorry, I wrote too quickly here--what I meant is that I don't agree there > is any unique "actual" truth about the CORRELATION between their ages, i.e. > whether or not they reach the same age simultaneously (of course there is > still a unique truth about each one's age at any specific event on his > worldline). They do reach the same age simultaneously in their comoving > inertial frame, but this frame's judgments can't be considered any more > "valid" than a different inertial frame. > > Jesse > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/groups/opt_out.