 Moreover, setting out the constitutive conditions for possessing a concept might be of some interest to philosophers generally, since many of the crucial questions they ask concern the proper understanding of ordinary notions such as material object, person, action, freedom, god, the good, or the beautiful. Suppose, further, that a domain, such as perhaps ethics or aesthetics, is “response dependent,” constituted by the underlying rules of our words and concepts; suppose, that is, that these rules constitute the nature of, say, the good, the funny, or the beautiful. If so, then it might not be implausible to claim that successful conceptual analysis could provide us with some a priori knowledge of such domains (although, again, sorting out the rules may require empirical linguistic and psychological theories not available to “armchair reflection”).