Cladistics is indeed consistent - consistently inconsistent

If cladistics ain't contradictory, then Russel's paradox is false. However, the fact that Russell's paradox can't be falsified thus instead means that cladistics IS contradictory. Russell's paradox simply falsifies cladistics (as a consistent approach).

Now, how can this fact be united with the fact that cladistics is consistent on the basis of its axiom (i.e., that classes are real)? The answer is that cladistics is consistently inconsistent. Cladistics is thus indeed consistent - consistently inconsistent.