I’m sorry how is clearly delineating a clade (in this case, “trans”) not crisp taxonomy.
You might, for example, come across a random dog and say “That’s not a Rotweiler that’s a dog”: It might be another named breed, it might be an incomprehensibly mixed-up street pupper, point is it’s not a Rotweiler but still a dog.
I’m sorry how is clearly delineating a clade (in this case, “trans”) not crisp taxonomy.
You might, for example, come across a random dog and say “That’s not a Rotweiler that’s a dog”: It might be another named breed, it might be an incomprehensibly mixed-up street pupper, point is it’s not a Rotweiler but still a dog.