ARISTOTLE WAS WRONG IN CALLING "ROUGH," "UNITED," "RARE," AND "DENSE" QUALITIES.
As to rough, united, rare and dense[269] these could not be called qualities; for they do not consist only in a relative separation or reapproximation of the parts of a body, and do not proceed everywhere from the inequality or equality of position; if they did, they might be regarded as qualities. Lightness and weight, also, could be correctly classified, if carefully studied. In any case, lightness is only a verbal similarity (a "homonym") unless it be understood to mean diminution of weight. In this same class might also be found leanness and slimness, which form a class different from the four preceding ideas.