 Similar considerations shed doubt on bare plural and mass nouns referring to kinds as single entities. For example, just as  (7a),  unlike  (7b),  cannot express the existence of a sum as an entity distinct from the individuals,  (8a)  could not be used to make a claim about the existence of an entity that is a possibly uninstantiated kind or property (Strawson 1959; Wolterstorff 1970: Chap. 7), as opposed to  (8b),  which can be used that way: