Yes, they are. Even something as minute as considering a collection of atoms an "element", i.e. organizing things into discrete clusters, is a social construct

Yes, they are. Even something as minute as considering a collection of atoms an "element", i.e. organizing things into discrete clusters, is a social construct. The human brain has a CPU limit so it has to cluster things to interact meaningfully with material reality. Glimpsing beyond this is nearly impossible because it goes outside the bounds of our abilities, but you can scrape at it if you abstract it enough like I'm doing here.