Natural Selection is not a metric, since it has no mathematical value, therefore, it must be a mechanism, which it is according to the theory, and as such, it is required to describe and explain physical phenomena. This is simply fundamental to a scientific theory.
I don't care how much supposed evidence there is for this or that, or what reasonable intuition may tell one about the state of affairs of biological entities on this planet. The bottom line is, if you can't even establish the fundamental requirements of the structure of a scientific theory, then you just don't have one, it's that simple.
Ah thanks for clearing that up- Hadn’t thought about that line of reasoning before- interesting- will have to give it more thought