  Abell’s institutional definition adapts Searle’s view of social kinds: what it is for some social kind, F, to be F is for it to be collectively believed to be F (Abell 2012; Searle 1995, 2010; and see the entry on   social institutions). On Abell’s view, more specifically, an institution’s type is determined by the valued function(s) that it was collectively believed at its inception to promote. The valued functions collective belief in which make an institution an art institution are those spelled out by Gaut in his cluster account (see section 3.1, above). That is, something is an art institution if and only if it is an institution whose existence is due to its being perceived to perform certain functions, which functions form a significant subset of the following: promoting positive aesthetic qualities; promoting the expression of emotion; facilitating the posing of intellectual challenges, and the rest of Gaut’s list. Plugging in Gaut’s list yields the final definition: something is an artwork if and only if it is the product of an art institution (as just defined) and it directly effects the effectiveness with which that institution performs the perceived functions to which its existence is due. One worry is whether Searle’s account of institutions is up to the task required of it. Some institutional social kinds have this trait: something can fail to be a token of that kind even if there is collective agreement that it counts as a token of that kind. Suppose someone gives a big cocktail party, to which everyone in Paris invited, and things get so out of hand that the casualty rate is greater than the Battle of Austerlitz. Even if everyone thinks the event was a cocktail party, it is possible (contrary to Searle) that they are mistaken: it may have been a war or battle. It’s not clear that art isn’t like this. If so, then the fact that an institution is collectively believed to be an art institution needn’t suffice to make it so (Khalidi 2013; see also the entry on   social  institutions).[3] A second worry: if its failure to specify which subsets of the ten cluster properties suffice to make something an artwork significantly flaws Gaut’s cluster account, then failure to specify which subsets of Gaut’s ten properties suffice to make something an art institution significantly flaws Abellian institutionalism.