 There are some useful lessons to learn from the failure of this attempt to import pre-relativistic temporal categories (like simply being present as opposed to present with respect to an inertial frame) into Minkowski spacetime. First, Sellars is careful to distinguish between events as things that happen or occur or take place and the ‘events’ (the use of single quotes is Sellars’) that are basic in relativity. The latter are just spacetime points. They do not take place or occur, and they are not the relata in causal relations, whereas events are. (But cf. Tooley (1997, Chapter 9))