The root of the evil in physics is Einstein's constant-speed-of-light falsehood. Physicists know that, start telling the truth sometimes, but then stop halfway. Modern physics is predicated on the falsehood and will collapse without it. In this regard, establishing the truth is suicidal:

"Lee [Smolin] and I discussed these paradoxes at great length for many months, starting in January 2001. We would meet in cafés in South Kensington or Holland Park to mull over the problem. THE ROOT OF ALL THE EVIL WAS CLEARLY SPECIAL RELATIVITY. All these paradoxes resulted from well known effects such as length contraction, time dilation, or E=mc^2, all basic predictions of special relativity. And all denied the possibility of establishing a well-defined border, common to all observers, capable of containing new quantum gravitational effects." Joao Magueijo, Faster Than the Speed of Light, p. 250 http://www.amazon.com/Faster-Than-Speed-Light-Speculation/dp/0738205257

"...Dr. Magueijo said. "We need to drop a postulate, perhaps the constancy of the speed of light." http://www.nytimes.com/2002/12/31/science/e-and-mc2-equality-it-seems-is-relative.html

"He opened by explaining how Einstein's theory of relativity is the foundation of every other theory in modern physics and that the assumption that the speed of light is constant is the foundation of that theory. Thus a constant speed of light is embedded in all of modern physics and to propose a varying speed of light (VSL) is worse than swearing! It is like proposing a language without vowels." http://www.thegreatdebate.org.uk/VSLRevPrnt.html

"The whole of physics is predicated on the constancy of the speed of light," Joao Magueijo, a cosmologist at Imperial College London and pioneer of the theory of variable light speed, told Motherboard. "So we had to find ways to change the speed of light without wrecking the whole thing too much." https://motherboard.vice.com/en_us/article/8q87gk/light-speed-slowed

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Pentcho Valev

Obviously variable (Newtonian) speed of light in Doppler effect:

https://www.youtube.com/watch?v=bg7O4rtlwEE

The speed of the light pulses relative to the stationary observer is

c = df

where d is the distance between the pulses and f is the frequency measured by the stationary observer. The speed of the pulses relative to the moving observer is

c'= df' > c

where f' > f is the frequency measured by the moving observer.

Physicists clearly see that the frequency and the speed of the light pulses vary proportionally for the moving observer, but believe (rather, force themselves to believe) that only the frequency varies - the speed of the pulses gloriously remains constant. Ignatius of Loyola explains:

Ignatius of Loyola: "We should always be prepared so as never to err to believe that what I see as white is black, if the hierarchical Church defines it thus."

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Pentcho Valev