You say "all life is a nested hierarchy", but apparently there are many creatures that don't fall into a nested hierarchy.
I'm not aware of any. Got a few examples?
Based on my reading of Dredge to this point, he has no idea whatsoever what a nested hierarchy is. The idea that at a particular moment in time a god created languages which are "distinct from each other" and yet form a nested hierarchy betrays a deep, deep misunderstanding.