> The former prisoner of war and U.S. Navy seaman Doug Hegdahl reports fellow U.S. captives in the Vietnam War would authenticate a new prisoner's U.S. identity by using "Shave and a Haircut" as a shibboleth, tapping the first five notes against a cell wall and waiting for the appropriate response.
With the mass export of western culture, I wonder if there are any songs, tunes, or patterns like this that would still reliably work as a shibboleth.
With the mass export of western culture, I wonder if there are any songs, tunes, or patterns like this that would still reliably work as a shibboleth.