This seems to be pure paradox. Yet, it is a definite implication of what our best classical theories – and they are indeed superb theories – are telling us about the nature of the ‘real’ material of our world. Material reality according to classical theory, let alone in the quantum theory that we are about to explore, is a much more nebulous thing than one had thought. Its quantification – and even whether it is there or not – depends upon distinctly subtle issues and cannot be ascertained merely locally! If such non-locality seems puzzling, be prepared for much greater shocks to come.
