 It seems unlikely that a simple argument will decide between these two metaphysical pictures of time, presentism and possiblism. Showing that McTaggart’s argument is flawed, because it relies on an ambiguity in the copula ‘is’, and that there is a way to construe passage that side-steps the traditional objections, moreover, does not show that eternalism is false but only that it is optional. In Newtonian spacetime it may appear implausible, but it may fare better when we turn to Minkowski spacetime.