 Instead, Shogenji prefers to answer Klein &amp; Warfield at the collective level, the level of the whole belief corpus. He argues that the corpora Klein &amp; Warfield compare differ in probability because they are of different strengths. The more beliefs a corpus contains, or the more specific its beliefs are, the stronger it is. In the case of the detective, adding the information about the twin increases the strength of her beliefs. And, in general, increasing strength decreases probability, since as we’ve seen, \(p(A \wedge B) \leq p(A)\). Thus the increase in the coherence of the detective’s beliefs is accompanied by an increase in strength. The net effect, argues Shogenji, is negative: the probability of the corpus goes down because the increase in strength outweighs the increase in coherence.