Hence why Russell’s paradox makes reference to the set of all sets that do not contain themselves, rather than just some sets that don’t contain themselves.
(Now, of course, mathematicians don’t use naive set theory anymore, but ZFC, which solves the problem.)
Hence why Russell’s paradox makes reference to the set of all sets that do not contain themselves, rather than just some sets that don’t contain themselves.
(Now, of course, mathematicians don’t use naive set theory anymore, but ZFC, which solves the problem.)