 Williamson 2013 also proposes that we should replace the possibilism-actualism distinction in favor of the distinction between necessitism (necessarily everything is necessarily something) and contingentism, which is the negation of necessitism. Necessitism entails that everything necessarily exists. Possibilism holds that some things are contingent existents, like you and me. Intuitively contingentism seems correct; it seems that you and I fail to exist at some possible worlds. But according to necessitism, such worlds are worlds where you and I do not exist as concrete objects but do exist as abstract objects. Williamson defends his proposal by arguing that the possibilism-actualism distinction is a distinction between a logical falsity and a logical triviality and that it neglects impossibilia. Menzel 2020 gives a critical examination of Williamson’s proposal. Also see Cameron 2016.