 It is not to be denied that the words “this animal” suffice to express a rough and ready identification in ordinary contexts of what things are. But this is because “animal” so easily takes on an individuative force from a context and/or some other sortal predicate that is ready to hand. But the designation “this animal” is complemented in all sorts of different ways. In itself it determines no single principle of individuation. (2001: 129)