> Wesley,
>
> Are you reading Lloyd's "natural selection and mutation" to mean not "these two
> natural processes" but rather something like "these two natural processes only
> where they are jointly and simultaneously operative"? I suspect Lloyd meant
> the former, whereas your reading of him seems to be the latter.
Yes. I meant the former.
> In any event, if one wants to be extremely pedantic, there are plenty of
> biological differences that are due to neither of these (e.g., a limb being
> damaged by a falling rock), but I doubt Lloyd meant to cover those in his use
> of "all".
Again, you're right.
Lloyd Eby