  The exact details of the collapse mechanism and its characteristics in the GRW/Pearle models have no significant implications for the type of non-separability and holism they postulate—all these models basically postulate the same kinds of non-separability and holism as orthodox quantum mechanics (see section 5.1.1). And action at a distance between the L- and the R-wing will occur if the L-measurement interaction, a supposedly local event in the L-wing, causes some local events in the R-wing, such as the event of the pointer of the measurement apparatus coming to possess a definite measurement outcome during the R-measurement. That is, action at a distance will occur if the L-measurement causes the R-particle to come to possess a definite z-spin and this in turn causes the pointer of the R-apparatus to come to possess the corresponding measurement outcome in the R-measurement. Furthermore, if the L-measurement causes the R-particle to come to possess (momentarily) a definite position in the R-wing, then the action at a distance between the L- and the R-wing will occur independently of whether the R-particle undergoes a spin measurement.