is clear that this formulation of the problem is defective. That is because it does not, in any way, identify the precise problem it wants to display within a detailed and specific theoretical framework. Instead, particularly in parts 1 and 2, it simply states some empirical facts. It is clear that, what Schlosshauer actually has in mind, is a formalism with a purely unitary evolution in which, as we said above, the measurement problem manifests as a mismatch between experience and some predictions of the theory. However, by not being explicit about this in his presentation, he obscures some of the crucial issues regarding the conceptual analysis needed to evaluate his claims. In particular, by not stating precisely what is the concrete quantum formalism he endorses, he allows for some “wiggle room” at the moment of *physically interpreting* the formal results obtained by decoherence.

Therefore, in order to avoid confusion, we will be explicit about the quantum formalism in play. It consists of the first three elements of the standard formalism described above. That is: physical states are represented by vectors, properties by Hermitian operators and states *always* evolve according to the Schrödinger equation. Note, that by dropping the collapse 