  The other disanalogy concerns the disparity between color vision, which is very similar among humans, and our senses of humor, shame, and the like, where people have quite different sensibilities. The merit schema makes it essentially contestable what counts as funny, good, or honorable, whereas what counts as red is not essentially contestable or often contested. “There is, of course, a striking disanalogy in the contentiousness that is typical of values;” McDowell (1985: 144) grants, “but I think it would be a mistake to suppose this spoils the point.” Instead, he concludes that this contentiousness allows for further criticism of actual responses, and precludes their simply bootstrapping themselves into correctness. “The aspiration to understand oneself is an aspiration to change one's responses, if that is necessary for them to become intelligible otherwise than as defective,” he writes (1985: 145). By contrast, there can be no sensible aspiration to change one's color vision through criticism and regulation, though one can conclude that it is defective and, hence, reserve judgment about certain colors based on one's experience. 