Abstract
The view that a possible world is an existing abstract object implies that all nonexistent possible individuals have a principle of individuation in terms of existing objects, properties, and relations. However, some individuals of this kind are totally out of this world both in the subjective sense that nobody in this world can pick them out, and in the ontological sense that they would neither be created by assembling or arranging existing bits of matter nor otherwise be generated by existing items. The only acceptable principle of individuation for such nonexistent possibles is that they are individuated by their unexemplified haecceities.