To worzel (#65)

First of all, the equation 2AB/(t'A-tA)=c, is not a postulate that is uniquely stuck to relativity at all. Instead, it is merely a different form of the basic elementary physics equation of velocity = distance/time. And, in Einstein's use in the paper it is merely the situation that his two tests were using the velocity, time and distance equation type of arrangement. His actual point in the section you pasted is to show that light was going to be used in the test to refelct in the mirror at B, and that the light velocity would obviously be at c. So, this isn't any great postulate revelation here, and the idea of light being constant in different reference frames isn't even in his intedned purpose in this locations at all.

So, what you described isn't true. His c is only referring to the veleocity of the light object in the description. Nothing about it being constant, EXCEPT for the true fact of c being constant in the travel from A to B, and then backward then to A. THAT is the point of the light speed being equal. It is factually the EQUAL thing and not actually needing to be right at the value of c anyway.

And, your nopes in the last part are also wrong because your assumption of the sped of light being constant in all later frames doesn't exist if the synch part fails. It does fail completely and the assumption you and Einstein made is factually wrong. You don't get to use a RESULT of the test IN the test that says yes, or no to the results.

So, you can state the postulate stuff all you want, but truth in real science says NO.