 Realists think there is a unitary sense of ‘object’, ‘property’ etc., for which the question “what objects and properties does the world contain?” makes sense. Any answer which succeeded in listing all the objects, properties, events etc. which the world contains would comprise a privileged description of that totality [Putnam 1981]. Anti-realists reject this. For them ‘object’, ‘property’ etc., shift their senses as we move from one conceptual scheme to another. Some anti-realists argue that there cannot be a totality of all the objects the world contains since the notion of ‘object’ is indefinitely extensible and so, trivially, there cannot be a privileged description of any such totality. [For discussions of indefinite extensibility see Dummett 1978, 1991; Linnebo 2018; Warren 2017].