 Hutcheson begins his argument for the internality of the power of discerning beauty by observing that the five external senses are insufficient for that discernment—one could have all five in perfect working order and yet be insensible to beauty (Hutcheson 1726 [2004, 23]). This observation, however, does not seem to show the discernment of beauty to be internal. It seems to show merely that such discernment cannot be identified with any known external power. But Hutcheson continues: