 For Quine, that is, their necessary non-concreteness notwithstanding, abstract objects exist no less robustly than we and, hence, in the context of the possibilism-actualism debate, are fully  actual.[20]  A particular advantage of this view of abstracta for the debate is that, assuming that there could be no necessarily non-actual objects, possibilia are the only things lacking actuality in the possibilist’s universe and, hence, actualism can take a particularly common and familiar form: