hihi.
I'd like to use the Advanced Search to isolate content items in my AGOL that are NOT in a group. The Boolean search terms seem like they might get close, but at least according to this documentation it seems like there are limits to making queries like that.
Honestly I'm thinking of the search functions available in gmail, like is:not read or has:attachment. Perhaps these terms are part of some tailored search system inside Gmail, but it seems like "content NOT IN group" would be a great way to search and would align with the structure of this system in a useful way that would make sense. Maybe it's there(!) and I don't know.
Anyway, have a great day.