I challenge you to present historical evidence that Einstein's theory of relativity was ever referred to as a hypothesis, ditto evolution - hell, I don't know of a single documented case where something that has later been referred to as a Theory started out being referred to as a Hypothesis.
Einstein's theory of relativity was consistent with the known experimental evidence of the day. If relativity had had no experimental support at the time, then it would have been more accurate to call it a
"hypothesis."
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"Einstein's original theory, formulated in 1905 and known as the special theory of relativity, was limited to frames of reference moving at constant velocity relative to each other. In 1915, he generalized his
hypothesis to formulate the general theory of relativity that applied to systems that accelerate with reference to each other. This extension showed gravitation to be a consequence of the geometry of space-time, and predicted the bending of light in its passage close to a massive body like a star, an effect first observed in 1919. General relativity, although less firmly established than the special theory, has deep significance for an understanding of the structure of the universe and its evolution."
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source
"It is clear from our previous considerations that the (special) theory of relativity has grown out of electrodynamics and optics. In these fields it has not appreciably altered the predictions of theory, but it has considerably simplified the theoretical structure, i.e. the derivation of laws, and—what is incomparably more important—it has considerably reduced the number of independent hypotheses forming the basis of theory."
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Albert Einstein (
source)
“The grand aim of all science is to cover the greatest number of empirical facts by logical deduction from the smallest number of hypotheses or axioms.”
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Albert Einstein
“Creating a new theory is not like destroying an old barn and erecting a skyscraper in its place. It is rather like climbing a mountain, gaining new and wider views, discovering unexpected connections between our starting points and its rich environment. But the point from which we started out still exists and can be seen, although it appears smaller and forms a tiny part of our broad view gained by the mastery of the obstacles on our adventurous way up.”
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Albert Einstein
"On the other hand, it must be conceded that a theory has an important advantage if its basic concepts and fundamental hypotheses are "close to experience," and greater confidence in such a theory is certainly justified. There is less danger of going completely astray, particularly since it takes so much less time and effort to disprove such theories by experience. Yet more and more, as the depth of our knowledge increases, we must give up this advantage in our quest for logical simplicity and uniformity in the foundations of physical theory. It has to be admitted that general relativity has gone further than previous physical theories in relinquishing "closeness to experience" of fundamental concepts in order to attain logical simplicity. This holds already for the theory of gravitation, and it is even more true of the new generalization, which is an attempt to comprise the properties of the total field. In the generalized theory the procedure of deriving from the premises of the theory conclusions that can be confronted with empirical data is so difficult that so far no such result has been obtained. In favor of this theory are, at this point, its logical simplicity and its "rigidity." Rigidity means here that the theory is either true or false, but not modifiable.
... The skeptic will say: "It may well be true that this system of equations is reasonable from a logical standpoint. But this does not prove that it corresponds to nature." You are right, dear skeptic. Experience alone can decide on truth. Yet we have achieved something if we have succeeded in formulating a meaningful and precise question. Affirmation or refutation will not be easy, in spite of an abundance of known empirical facts. The derivation, from the equations, of conclusions which can be confronted with experience will require painstaking efforts and probably new mathematical methods.
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Albert Einstein (
source)
"I think and think for months and years. Ninety-nine times, the conclusionis false. The hundredth time I am right."
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Albert Einstein
"No amount of experimentation can prove me right, one experiment can prove me wrong."
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Albert Einstein
“It's not that I'm so smart , it's just that I stay with problems longer.”
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Albert Einstein
“We still do not know one thousandth of one percent of what nature has revealed to us.”
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Albert Einstein
"If the facts don't fit the theory, change the facts."
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Albert Einstein ... (
in jest, no doubt)
"If we knew what it was we were doing, it would not be called research, would it?"
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Albert Einstein
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“I am quite conscious that my speculations run beyond the bounds of true science. It is a mere rag of an hypothesis with as many flaws and holes as sound parts.”
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Charles Darwin