 The ontological thesis, P, requires supplementation. Consider, for example, a possible world, w, at which the growing block theory of time is true. At the first moment of w, P is true. There exists only the first moment and that moment is present; there are no other moments, and so the past hasn’t yet come to exist. Later on, it will become clear that w isn’t a presentist world, even though it seems initially to satisfy P: at the first moment, only present things exist. For this reason, when being more forthcoming with a definition of their view, moving beyond mere slogan, presentism might more perspicuously be rendered as a view that is always true, if true at all (Crisp 2003: 215; 2004: 19, fn.6; Deasy 2017: 380). So, presentism amounts to the claim that: