dhw: You drew attention to the special abilities of human hands. I agree they are special. So are elephants' trunks. All species (broad sense) have special qualities of one sort or another. They are all different in kind.....-You refuse to see or admit that 'differences in kind' have remarkable degrees of difference. An elephants trunk cannot play a Beethoven piano concerto. Yes birds fly, with their given ability but we fly also all together with other folks in marvelous inventions.