Before revision: However, the probability of two events occurring together (that is, in conjunction) is always less than or equal to the probability of either one occurring alone —formally, for two events A and B this inequality could be written as and .
After revision: However, the probability of two events occurring together (that is, in conjunction) is always less than or equal to the probability of either one occurring itself —formally, for two events A and B this inequality could be written as and .