As ons alles saamvoeg kan dit verduidelik waarom universiteitverlaters sowel as minder opgeleide Amerikaners minder weet oor die wêreld as hulle eweknieë van 20 jaar gelede.
So, if you put it all together, this could help explain why today's college graduates, as well as less educated Americans, know less about the world than their counterparts did 20 years ago.