People coordinate by gravitating to salient solutions without communication.
Schelling asked students where they would meet a stranger in New York with no way to communicate; most said Grand Central information booth at noon. Nothing makes it correct except that others will think so too.
In practice
- Two colleagues separated in an unfamiliar airport both make for the departures board, having agreed nothing beforehand.
- A team with no agreed process defaults to the meeting everyone can see in the calendar, and the calendar became the coordination device.