Neither, I'm trying to tease a definition of "kind" out of them. If there is a definition of "kind" written down, they we can talk about it's merits, other possible definitions, study exceptions and so on. If they won't give a definition then what can be done? Nothing. No science, no predicitions, no exploration or discussion.
A "kind" is a species of limbo bar; it can be moved when shown to be an inadequate barrier.