Russell's paradox(redirected from Set of sets that don't contain themselves)
Also found in: Encyclopedia.
Related to Set of sets that don't contain themselves: Set of all sets that do not contain themselves
(Logic) logic the paradox discovered by Bertrand Russell in the work of Gottlob Frege, that the class of all classes that are not members of themselves is a member of itself only if it is not, and is not only if it is. This undermines the notion of an all-inclusive universal class