 A central threat to coherence is the question of how a thing could be identical to its properties. Alvin Plantinga (1980, 47) maintains that if God is identical to his properties, then he is a property, and they are a single property, in which case God is a single property. Given that properties are abstract entities, and abstracta are causally inert, then God is abstract and causally inert — which is of course inconsistent with the core tenet of classical theism according to which God is the personal creator and sustainer of every contingent being. No abstract object is either a person or a causal agent. No abstract object can be omniscient, or indeed know anything at all. More fundamentally, no abstract entity can be identical to any concrete entity. God as person and creator is concrete. Abstracta and concreta are mutually exclusive and jointly exhaustive. Nothing can be both. Objections similar to Plantinga’s have been raised by Richard Gale (1991, 23 ff.), William Hasker (2016, 703) and others.