@3ammo This isnt true because your missing the fundemental point... one-way light speed is impossible to measure, determine, or see.. so if it exists, if that is reality, it is unknown to use and can in no way effect what we observe and in turn in no way effects our math or models... Sure we can throw it in and assume c is different in a certain direction because its "reality".. but if we do that the results of all the equations (since the real world is always 2-way) remain the same anyway (and thus why its a convention not a postulate)... so all the complexities you mention are also moot.