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common knowledge

Information every human being should know. Coffee just after being on a burner is hot. Mississippi River flows south.
Everyone knows about the birds and the bees, its common knowledge
common knowledge by Rego June 29, 2003

Common Knowledge

Used to describe a girl who likes to sleep around. A girl who is a slut and has sex with everyone
Bob: Man.. i can't believe my girl cheated on me!
Sean: Don't worry man. That bitch is just common knowledge.
Common Knowledge by Zackaroni February 3, 2010

Common Knowledge

People are born with the knowledge that Latin is spoken in Rome in today's society (common knowledge), but they are not born with the knowledge of roman numerals (not common knowledge)

common public knowledge 

when something is available for everyone to see. When an item or another object isn't kept secret, but rather open to the public.
Nicole: Andy, you can't go around reading other people's text messages
Andy: Sorry. I-I-I th-thought it was common public knowledge!

or

Amy and Malory: Andy, stop creeping around our hallway
Andy: Well it's common public knowledge

Common sense would dictate such knowledge 

A more intelligent way of saying duh
Person 1: Spinning makes me dizzy.
Person 2: Well duh!

Person 1: *smacks*

Different situation

Person 1: Spinning makes me dizzy
Person 3: Common sense would dictate such knowledge
Person 1: Huh..?