True_Candyman
Emperor
There could be a worldgen time separation of continents that assigns one or more close landmasses to a single continent. Alternatively, coast tiles only wouldn't count as "ocean" for separation purposes.
The problem with that is that the standard map most of the time contains oly 2 continents by those terms. And there's also a chance that both continents in it can be connected by shallow water. Potentially that means you can get a game where you can only get 1 of the resources or maybe even none.
Such a narrow definition of their UA would make them extremely restricted by map type and unbalanced on the very map type that all the civs are generally balanced against.
I will eat take up hat eating if it turns out they define continents like you suggest.