 First of all, one must consider whether there are abstract objects that have one of the two features but not the other. For example, consider an impure set, such as the unit set of Plato (i.e., \(\{\textrm{Plato}\}\)). It has some claim to being abstract because it is causally inefficacious, but some might suggest that it has a location in space (namely, wherever Plato is located). Or consider a work of fiction such as Kafka’s The Metamorphosis. It, too, has some claim to being abstract because it (or at least its content) is non-spatial. But one might suggest that works of fiction as paradigmatic abstract objects seem to have causal powers, e.g., powers to affect us.