> Apparently we are all fish. Or fish don't exist. I get very annoyed at this argument. It pretends that the only classification systems are strictly followin

> Apparently we are all fish. Or fish don't exist. I get very annoyed at this argument. It pretends that the only classification systems are strictly following a single ancestor or ignoring ancestry entirely. The common definition of fish is neither of these. It's paraphyletic. Everything descended from A, except things descended from B and C.