The clock that passes through the most space records the least time. There is no symmetry ambiguity or any other ambiguity. Before you talk about something, know something about the something. If you cannot run the math then your opinion is without foundation. Ignorance can be educated, stupidity is forever. Make your choice.
http://hyperphysics.phy-astr.gsu.edu...iv/airtim.html
Hafele-Keating Experiment
http://bkocay.cs.umanitoba.ca/Students/Theory.html
The distorted cube
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Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz4.htm