 While there is in Sellars’ paper a lengthy and illuminating series of reflections on the relation between events, facts, and substances, there is no guidance offered on the relation between a moment’s being present with respect to a given perspective and a moment’s simply being present, a concept which is ill-defined from a relativistic point of view. If this latter is indeed an essential feature of a temporal picture of the world, then it would seem that special relativity does not provide us with a temporal picture of the world. If on the other hand the world is fundamentally temporal in the way that Sellars insists it must be, then (at least as far a special relativity as a representation of that world is concerned), Sellars’ famous scientific realism is compromised because what he deems for metaphysical reasons to be an ‘essential feature’ of a temporal picture of the world does not appear in a fundamental theory of spacetime.