For if snub nose and concave nose are the same thing, snub and concave will be the same thing; but if snub and concave are not the same (because it is impossible to speak of snubness apart from the thing of which, in its own right, it is an attribute, for snubness is concavity in the nose), either it is impossible properly to say 'snub nose' or the same thing will have been said twice, concave nose nose; for snub nose will be concave nose nose.