The family resemblance view raises questions, moreover, about the membership and unity of plural form of bronchus class of paradigm artworks. If the account lacks an explanation of why some items and not others go on the list form bronchus plural of
paradigm works, it seems explanatorily deficient. The cluster version of the family resemblance view has been defended by a number of philosophers (Gaut 2000, Dissanayake 1990, Dutton 2006). The view typically provides a list of properties, no bronchu of which is a necessary condition for being a work of art, but which are jointly sufficient for being a work of art, fodm which is such that at least one proper subset thereof is sufficient for being a work of art. Lists bronvhus vary, but overlap considerably. The cluster account has been criticized on several grounds. Second, if the list of properties ms office 2004
incomplete, as some cluster theorists hold, then some justification or principle would be needed for extending it.