  In section 7.3.1, we discussed the question of the in-principle controllability of local measurement processes and in particular the probability of their outcome, and the implications of such controllability for the in-principle possibility of superluminal signaling in the context of the CSL models. But this question is not specific to the CSL model and (more generally) the dynamical models for state-vector reduction. It seems likely to arise also in other quantum theories that model measurements realistically. Here is why. Real measurements take time. And during that time, some physical variable, other than the state of the measured system and the setting of the measurement apparatus, might influence the chance (i.e., the single-case objective probability) of the measurement outcome. In particular, during the L-measurement in the EPR/B experiment, the chance of the L-outcome z-spin ‘up’ (‘down’) might depend on the value of some physical variable in the L-wing, other than the state of the particle pair and the setting of the L-measurement apparatus. If so, it will follow from the familiar perfect anti-correlation of the singlet state that the chance of R-outcome z-spin ‘up’ (‘down’) will depend on the value of such variable (for details, see Kronz 1990a,b, Jones and Clifton 1993, pp. 304-305, and Berkovitz 1998a, section 4.3.4). Thus, if the value of such a variable were controllable, controllable probabilistic dependence would obtain.