 Suppes and Zanotti (1976) showed that, for the special case of perfect correlations between outcomes of the two experiments, in which an outcome of an experiment on one system makes possible prediction with probability one of the outcome of an experiment on the other, OD must be satisfied if the factorizability condition (F) is. This applies to the case considered by Bell 1964. In Bell 1971 and subsequent expositions Bell provided a generalization that does not presume perfect correlation and does not require OD, either as a supposition or as a consequence of other  suppositions.[5] 