As discussed in [62, 127], for the adequate description of the operation of ion channels, the major components of neuronal computing, three-state systems must be used. In the present two-state digital electronic logic systems, discharging the internal capacitances can be considered a ”refractory” period, i.e., a third state, which defines time’s direction. However, it is not known if such a third state can be available among the quantum states at all. Because of these reasons, in the foreseeable future, quantum computers will not represent an alternative general-purpose architecture. ”Building such machines are decades away” [164]. However, biological neurons are three-state systems @endlink.