When I studied the Efe Pygmies of the Congo, I discovered (and yes, it was me who discovered this amazing fact everyone now knows) that the Efe organize their space in elongated linear trails. They knew all about everything along those specific trails, and their knowledge of other trails was often very limited. If an Efe person spent time living with a group associated with a trail, he* would learn about that trail as well. Most interesting is that one’s knowledge of important things like where to find food (or danger) was based on experience not on general principles. So an Efe off his trail, or another trail he knew about, was not much better than, say, me (after a couple of years gaining my own experience) at having a clue. Also interesting is that there is a relatively formal connection between historic families (you can think of these as “clans”) and regular use of specific trails or sets of trails. So an older male member of Clan X will tend to know all the trails anyone in Clan X knows.
Turns out this is true of Minnesotans as well….