Obviously physicists totally know about causality being restricted to the light cone! And “curvature of space = light cones at each point” isn’t Penrose, it’s standard General Relativity.
Not claiming it’s his own idea, just that it showed up in the book, I assume it’s standard.
Obviously physicists totally know about causality being restricted to the light cone! And “curvature of space = light cones at each point” isn’t Penrose, it’s standard General Relativity.
Not claiming it’s his own idea, just that it showed up in the book, I assume it’s standard.