We have. We lost that ability. Why is an interesting question, and I
think the answer is that it "costs" too much. As life gets more complex,
the repair systems need to be more sophisticated, and the overhead
involved in carrying around such a repair system makes those individuals
less likely to survive and reproduce. Ironic, isn't it.
I think we just found someone less intelligent that the former girlfriend
you were talking about.

He was talking about me. He considers me less intelligent than
somebody's former (dumb) girlfriend because I stated that our ancestors
(far enough back in evolutionary times) =did= have the ability to regrow
parts.

He's using faith based reasoning. Don't sweat it.

Jose
--
"Never trust anything that can think for itself, if you can't see where
it keeps its brain." (chapter 10 of book 3 - Harry Potter).
for Email, make the obvious change in the address.