That’s part of the idea that I’m trying to get at, though like you, I resist the biological metaphor. In any case, this point is a tiny fragment of an argument that I hope is a good bit broader, so I don’t want to fixate on it too much. As I suspect most “arguably” lines are, it’s kind of a throwaway in the service of setting up the main point; I don’t want to be wrong about it, but at the same time, it’s not really necessary to be entirely right, I don’t think, as the thing can probably be excised, basically being a species of throat-clearing before really getting to the meat of things.