The discerning mind would not confuse mathematical theories with speculative ones.
But you previously stated that the theory of evolution is not on as firm ground as relativity because evolution is about "things that haven't been observed." This implies that relativity is about things that have been. Therefore, since relativity is about the curvature of space-time, please tell me when the curvature of space time has been observed or correct your previous line of debate. (or correct my understanding of what you were saying)