[citation][nom]mrecio[/nom]Why do they call it Common Sense when in fact its not common at all?[/citation]
Common sense, based on a strict construction of the term, consists of what people in common would agree on : that which they "sense" as their common natural understanding. Some people use the phrase to refer to beliefs or propositions that — in their opinion — most people would consider prudent and of sound judgment, without reliance on esoteric knowledge or study or research, but based upon what they see as knowledge held by people "in common".