@metal-brain said
Is that what was said after the Michelson–Morley experiment was done,
Whether someone bothered to say it or whether anyone merely thought it is irrelavent to the fact that its true. You make no point.
SR is a theory, not a fact.
No, its a scientific fact;
https://en.wikipedia.org/wiki/Tests_of_special_relativity
"...
Many experiments played (and still play) an important role in its development and justification. The strength of the theory lies in its unique ability to correctly predict to high precision the outcome of an extremely diverse range of experiments. Repeats of many of those experiments are still being conducted with steadily increased precision, with modern experiments focusing on effects such as at the Planck scale and in the neutrino sector. Their results are consistent with the predictions of special relativity.
..."
And now if you cross reference that with what a scientific fact is;
https://en.wikipedia.org/wiki/Fact#In_science
"...In science, a fact is a repeatable careful observation or measurement (by experimentation or other means), also called empirical evidence. Facts are central to building scientific theories. Various forms of observation and measurement lead to fundamental questions about the scientific method, and the scope and validity of scientific reasoning.
In the most basic sense, a scientific fact is an objective and verifiable observation, in contrast with a hypothesis or theory, which is intended to explain or interpret facts
..."
That means its a scientific fact.
Do you claim that SR is false? If no, you make no point. If yes, prove its false!