Noun
anything generally known to everyone
Source: WordNetIt is now common knowledge that the average American gains 7 pounds between Thanksgiving and New Year's Day. Marilu Henner
It is a matter of common knowledge that the government of South Carolina is under domination of a small ring of cunning, conniving men. Strom Thurmond
It is common knowledge that smoking is considered one of the nation's leading causes of preventable death, but it's less widely known that cigarettes are also the leading cause of fatal fires. Ed Markey
It is common knowledge to every schoolboy and even every Bachelor of Arts, That all sin is divided into two parts. One kind of sin is called a sin of commission, and that is very important And it is what you are doing when you are doing something you oughtn't... Ogden Nash
Everybody knows it. Wizards are supposed to have beards. It's common knowledge. Terry Goodkind
The need for a body of common knowledge and common reference does not disappear when a society is pluralistic. On the contrary, it grows more necessary, so that people of different origins and occupation may quickly find familiar ground and as we say, speak a common language. Jacques Barzun