Logical reasoning

Book : Paradox of the invariance of the speed of light  (click on the link)

Appendix 1

A summary of my reasoning:

I am attempting here to make the following important points:

a) that the physical invariance of the speed of light implies belief in the principle of the relativity of simultaneity at the physical level;

b) that the principle of the relativity of simultaneity at the physical level is  self-contradictory, as shown by the spacecraft and missile objection presented here;

c) that absolute simultaneity at the physical level must exist, since there is no third possibility in addition to the relativity of simultaneity at the physical level and absolute simultaneity at the physical level.

 From this we can conclude:

d) that there has to be a present instant in the Universe;

e) and that the speed of light cannot in every possible situation be physically invariant with respect to different inertial frames of reference, which we will predictably be able to measure at some point in the future.

Appendix 2 

According to Dr. Gilles Plante, a Doctor of Philosophy specialize in the art of critical commentary:

Proposals A, B and C are the premises of a conditional syllogism based on the modus tollens form of argument, the conclusions of which can be found in lines D and E.

An example of a conditional syllogism based on the modus tollens form of argument:

If A is true, then B is true

However, B is not true.

Therefore A is not true.

A conditional syllogism using the modus tollens form of argument:

If the "invariance of the speed of light at the physical level " holds true, then the "principle of relativity of simultaneity at the physical level" also  holds true.

However, since the  "principle of the relativity of simultaneity at the physical level", has been disproved by the spacecraft and missile objection,

the "invariance of the speed of light at the physical level" does not hold true.

It can therefore be concluded:

D) that there has to be a present instant in the Universe;

E) and that the speed of light cannot in every possible situation be physically invariant in different inertial frames of reference, which we will predictably be able to measure at some point in the future.