I don't want to say any more than I have to about this, I don't want to
contaminate the answer. Lets just say 2 people disagree about something. I
am trying to keep it simple.

Lets take for example a simple piece of coax. 1 center conductor, 1 outer
braid. The cable is carrying AC in the RF range to an antenna. Why coax?

Do you think the outer braid could be correctly referred to as a "shield"?

Thanks,
--Dan