 Equation 6 offers the opportunity of discussing the possibility of relating the suppression of coherence to gravitational effects. In fact, with reference to this equation we notice that the worst case scenario (from the point of view of the time necessary to suppress coherence) is that corresponding to the superposition of two states for which the occupation numbers of the individual cells differ only by one unit. In this case the amplifying effect of taking the square of the differences disappears. Let us then ask the question: how many nucleons (at worst) should occupy different cells, in order for the given superposition to be dynamically suppressed within the time which characterizes human perceptual processes? Since such a time is of the order of \(10^{-2}\) sec and \(f = 10^{-16}\text{ sec}^{-1}\), the number of displaced nucleons must be of the order of \(10^{18}\), which corresponds, to a remarkable accuracy, to a Planck mass. This figure seems to point in the same direction as Penrose’s attempts to relate reduction mechanisms to quantum gravitational effects (Penrose 1989).