Einsteinians (believers in Einstein's relativity) used to obey Ignatius of Loyola's principle. They would clearly see that the frequency and the speed of the light pulses vary proportionally for the moving observer in Doppler

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

but would believe that only the frequency varies - the speed of the pulses gloriously remains constant.

Ignatius of Loyola's principle: "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."

Nowadays all Einsteinians know that the speed of light is VARIABLE AS PER NEWTON. Many of them silently leave Einstein's sinking ship and promptly become experts in quantum mechanics, AI, philosophy, consciousness, biology, meaning of life, climate science, anything:

https://c6.quickcachr.fotos.sapo.pt/...2108_dBrrH.png

If there is a next, Einstein-free version of fundamental physics, Einstein's 1905 nonsensical axiom

"The speed of light is constant"

will be replaced with the correct and easily justifiable axiom

"For a given emitter, the wavelength of light is constant".

I have developed the idea in a series of tweets he https://twitter.com/pentcho_valev

Pentcho Valev