 The starting point of RQM is that quantum mechanics is not about a wave function (or a quantum state) \(\psi\); it is about values of physical variables. The ontology assumed by RQM, accordingly, includes only physical systems and variables that take values, as in classical mechanics. For instance, a real fact is the position of a particle having a certain value \(x\) at a certain time \(t\). Facts as this one (“the particle is at \(x\) at time \(t\)”) are called “events”, or “quantum events”. Quantum theory is about events. However, in classical mechanics there are two general assumptions that are abandoned in quantum theory.