Abstract

But how can any entity be not self-identical? If it is both itself and another, then it is not an entity but a pair of entities. At best, an entity which is not self-identical is a series of concrete, self-identical, unchanging entities, parallel to what Whitehead calls "personal order." But even then the series itself would be self-identical qua a series, although its constituents exhibit successive differences. Therefore, to speak of entities which are not self-identical is either not precise or contradictory. It is not precise if two or more entities are referred to as one entity, even if this one entity is then said to be not self-identical. It is contradictory if a self-identical series or collection of self-identical entities is called a non-self-identical entity. Therefore, for the same reason for which a concrete entity cannot change, no entity can change.