Theory - 'Not derived from experience; speculative; to form opinions solely by speculation' According to Webster's dictionary. Meaning; Einstein's theory, however attractive on paper, has never been proven to be true. It is just that ; a theory. And that's not what I think it means, that's what Webster's says it is. It isn't truth, until it can be proven. It doesn't matter how many other 'theories' have been based on this in the past century it is still a 'theory'. It you based all of you thruth on centuries old theory, then you should believe in evolution too, which also cannot be proven.