> Could GR and QM be wholly separate with no unifying connection? What does this mean? Is it mean that Universe have insufficient rules, so there are phenomena

> Could GR and QM be wholly separate with no unifying connection? What does this mean? Is it mean that Universe have insufficient rules, so there are phenomena which do not follow any rules? Is it possible to devise an experiment whose results would be totally fundamentally irreproducible? Or you mean that Universe has strict rules, but human's ways to write these rules are flawed and insufficient to grasp in a full a fractal nature of mythical rules of Universe?