  But STAT FUNC cannot only be derived from the QM formalism; it also follows from FUNC  [Proof]. This can be seen as providing “a plausibility argument for FUNC” (Redhead 1987: 132): STAT FUNC is true, as a matter of the mathematics of QM. Now, if FUNC were true, we could derive STAT FUNC, and thus understand part of the mathematics of QM as a consequence of   FUNC.[12]