  Bohm's theory portrays the quantum realm as deterministic.  Thus, the single-case objective probabilities, i.e., the chances, it assigns to individual spin-measurement outcomes in the EPR/B experiment are different from the corresponding quantum-mechanical probabilities.  In particular, while in quantum mechanics the chances of the outcomes ‘up’ and ‘down’ in an earlier L- (R-) spin measurement are both ½, in Bohm's theory these chances are either one or zero. Yet, Bohm's theory postulates a certain distribution, the so-called ‘quantum-equilibrium distribution,’ over all the possible positions of pairs with the same guiding field. This distribution is computed from the quantum-mechanical wave function, and it is typically interpreted as ignorance over the actual position of the pair; an ignorance that may be motivated by dynamical considerations and statistical patterns exhibited by ensembles of pairs with the same wave function (for more details, see the entry on bohmian mechanics, section 9). And the sum-average (or more generally the integration) over this distribution reproduces all the quantum-mechanical observable predictions.