The biological discipline called “cladistics” is not hypotetico-deductive but inductive (ie, a faith rather than a science and therefore more correctly called “cladism). It means that it is inconsistent, actually paradoxically self-contradictory (see Russell’s paradox). The fundamental component that makes it inductive is assuming that kinds are real, ie, can be found.
This fact means that the discipline in practice is “a vain search to define the indefinable”, as Charles Darwin expressed it. It’s end point is actually a paradox.