It is probably safe to say that all the changes of factual knowledge which have led to the relativity theory resulting in a very great theoretical development are completely trivial from any point of view except their relevance to the structure of a theoretical system.
From all this it follows what the general character of the problem of the development of a body of scientific knowledge is in so far as it depends on elements internal to science itself.
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It is that of increasing knowledge of empirical fact intimately combined with changing interpretations of this body of fact – hence changing general statements about it – and not least a changing a structure of the theoretical system.
