The family \(\FC_u\) is of no use for resolving the first measurement problem M1, because the family of histories does not include the projectors \(\{[m^j]\}\) for the pointer positions at time \(t_2\) needed to discuss the measurement outcome, nor can it be refined to include them, because \([\Psi_2]\) will not commute with some of the \([m^j]\), assuming at least two of the \(c_j\) in \eqref{eqn18} are nonzero. This is the basic reason why the first measurement problem M1 is an enormous difficulty for quantum interpretations in which the only possible time dependence for a closed quantum system is that given by Schrödinger’s equation. By contrast, the histories approach gives the physicist Liberty to use a different family