Epigram 02

Why do we eat sardines yet never goldfish, ducks yet never parrots? Why does adding cheese make a hamburger a "cheese burger" whereas adding ketchup does not make it a "ketchupburger"? … How do we figure out which things that are said at a meeting are to be considered "off the record" and officially ignored? And how do we come to "remember" things that happened long before we were born?

Eviatar Zerubavel, Social Mindscapes