 so that combining collectively independent but individually useless testimonies, however coherent, fails to give rise to anything useful. (As noted in Olsson, 2005, section 3.5, the matter is somewhat complicated by the fact that Lewis adopted a notion of independence that is weaker than Conditional Independence. Ironically, Lewis’s weaker notion turns out to be compatible with the combination of Nonfoundationalism and Coherence Justification.)