Full Idea
Processes can be modelled in two ways. They are drawn out events encompassing many changes, but dissectible into short-lived states, none including change. Or they are continuous and impenetrable, and to split them is impossible.
Gist of Idea
Processes are either strings of short unchanging states, or continuous and unreducible events
Source
Neil E. Williams (The Powers Metaphysics [2019], 09.3)
Book Reference
Williams,Neil E.: 'The Powers Metaphysics' [OUP 2019], p.211
A Reaction
Obviously a process has temporal moments in it, so the unsplittability is conceptual. I find the concept of changeless parts baffling. But if processes are drawn out, they can't be basic to ontology.