Why we need to reconstruct the universe
David Deutsch, Chiara Marletto
The most fundamental theories in physics, provide a meaning for information or even a way of measuring it. And it has a counterfactual character: a message cannot carry information unless a different message is also possible. Statements about information were therefore long regarded in physics as second-class, non-fundamental approximations. Information itself was considered an a priori abstraction like Euclid's perfect triangles and circles, whose physical instantiations are inevitably approximate. Here, Deutsch and Marletto talk about the current theories of physics
The New Scientist•Jan 1, 2014•1 citation