The Cause of Self-Contradiction (2)
Then halfway in Einstein's paper, "On the Electrodynamics of Moving Bodies", the motion of light became absolute, as can be seen from the middle part of section 3, part I:
With the help of this result we easily determine the quantities ξ,η,ζ by expressing in equations that light (as required by the principle of the constancy of the velocity of light, in combination with the principle of relativity) is also propagated with velocity c when measured in the moving system.
The motion of light may be relative or absolute, but can never be both.
Since its contradicting requirements can never be met, the theory of Special Relativity must be wrong.
In fact, we have talked about this problem in section "What is Relativity". Here we only added a few more details.