A transactive memory system is a mechanism through which groups collectively encode, store, and retrieve knowledge. Transactive memory was initially studied in couples and families where individuals had close relationships but was later extended to teams, larger groups, and organizations to explain how they develop a “group mind”Wikipedia
A simple example is a parent who doesn’t need to remember how to change the TV brightness because their kid knows how to do it. So even though it’s not in the parent’s memory, it’s in their transactive memory, which is good enough.
Just thought that was interesting.