 But, when we try to unpack exactly in which sense the set of gold atoms is non-abstract, we can see that it is hard to distinguish the masses-as-sets view from the plurals approach which we will examine below. The non-abstract set theorist will hold that a set of gold atoms can in fact have physical properties, in virtue of the properties of its members. So, a non-abstract set theorist would first paraphrase “the gold weighs ten ounces” into “that set of gold atoms weighs ten ounces.” But, in order to explain how a set weighs ten ounces, they would have to again paraphrase and analyze the latter as something like “the set’s members collectively weigh ten ounces.” But if the set theorist has to paraphrase their paraphrase, then there is considerable pressure for the set theorist to instead switch over to the stuff-as-plurals view (section  2.3)  and just talk directly about the members. If we are just talking about the members, or the gold atoms, and we can say what we want about many things without talking about the set of those many things, then why complicate matters by introducing sets?