Why Gravity is Non-Quantum

The comprehensive analysis of Niels Bohr shows that the classical world is a necessary additional independent conceptual structure not derivable from quantum mechanics. The results of measurement mustalways be expressed classically. Furthermore, neither linear "decoherence", nor any other unitary linear models/interpretations can ever result in the observed nonlinear classical physics. As we will see, the invariant objective classical events constituting the dynamically nonlinear spacetime of general relativity is this classical structure. Hence,classical gravitation is required to make the abstract and purely formal, perfectly linear, quantum mechanical eternal coexistence of many mutually incompatible possibilities into the concrete reality of the observed nonlinear world. It also means that "Quantum Gravity" is a pseudo-problem, a mirage, "Quantum Spacetime" an oxymoron