I’ve watch the phylogeny discourse on Tumblr go from “cladistically speaking, birds are dinosaurs”, to “by the same logic, humans are fish”, to “from a taxonomic standpoint there’s technically no such thing as a fish”, and frankly I’m excited to see where it goes next.
If, taxonomically, there’s no such thing as a fish merely because the term is used to describe a group of species that is not a clade, then there’s also no such thing as a monkey, a crab, or a bee. There is, however, such a thing as a bird.
Only birds are valid.