The Twin Paradox implies that the Universe as a whole is a special frame

[thetrellan]

Where have you been seeing that?

uh, right here? For one.

 

[Ibix]

uh, right here? For one.

Pervect isn't saying what you are saying, though - in fact he explicitly says "the one that undergoes inertial motion will have the longest elapsed time on their clock". Am I correct in my interpretation above, that you are reading his Euclidean length analogy as saying the traveller should be older? Because that's a difference between Euclidean and Minkowski geometry.

 

[PeterDonis]

uh, right here? For one.

@pervect says exactly the opposite:

if two twins take different routes and meet up again, the one that undergoes inertial motion will have the longest elapsed time on their clock

The one that undergoes inertial motion is the stay-at-home twin, not the traveling twin.