Naturalism and Norms (Postscript)

Philip K asks some very probing and incisive questions about ethical naturalism (EN) in his comment on my post "Naturalism and Norms." These questions raise issues too large and too important to be addressed in the very limited space of a comment box, so I am making a new post. He puts two questions to the ethical naturalist: Here are two questions, then. First, is it an