Bayes’ theorem the assumption that a conditional probability can be used even when the conditioned event is prior to the unconditioned one; some statisticians, the “non-Bayesians,” have qualms about using B. t. when A is an event that is thought to cause event B, i.e. when it is represented by the explanitory variable. (Cf. Carol Ash (1993), pp. 56-62) [Cf. Ch. 2, §2, ¶7]