Isometrically rules out paradoxical states of the universe, says Cotler and Strominger. It says the universe is only physically possible if it can evolve backward without generating contradictions. Cotler speculates that a true cosmological isometry could be verified by calculating which specific patterns in the distribution of the matter in the sky are possible and which aren’t. The next step is to develop a detailed quantum theory that describes how the cosmos grows, not just how everything came from the first place, but where it came from.Read Long Article
