KWW wrote:
 > That logic has always struck me as faulty. Just because
 > there are colors that we could never agree as whether it
 > was purple or blue doesn't mean that there isn't such a thing
 > as "color", and that classifying things according to it is
 > useless."

To use your analogy that means classifying every single color as 
either red, green or blue or Asian, Black, White.