 There is enormous controversy about each of these alleged varieties of modality. For each of logical, conceptual, nomic, metaphysical and normative flavors of modality, some philosophers have raised important challenges to whether that flavor of modality is well-regimented, theoretically useful, or genuinely distinct from others on the list. This entry will not enter seriously into those debates. (For discussion of some of the issues, see the entry on  varieties of modality.)  If we instead provisionally assume that each of these notions is legitimate, this will put us in a position to ask (in  Section 2,  below): what is the modal strength of the supervenience thesis that we should accept?