# Confusion of the inverse | | **Confusion of the inverse**, also called the conditional probability fallacy or the inverse fallacy, is a logical fallacy whereupon a conditional probability is equated with its inverse; that is, given two events A and B, the probability of A happening given that B has happened is assumed to be about the same as the probability of B given A, when there is actually no evidence for this assumption. More formally, P(A|B) is assumed to be approximately equal to P(B|A). | |-|-| | | wikipedia:: [Confusion of the inverse](https://en.wikipedia.org/wiki/Confusion_of_the_inverse) |