For the honor of its own name, 

truth never calls others names.

An asterisk on this one. It will call a fraud and fraud, and cite the incidents where this is true. But, it never stoops to such expressions that are typically used in name-calling, such as "idiot," "slime," etc. Usually, it will refer to the event, not the person, saying, "You were dishonest on that occasion," instead of, "You are a liar," but there are times when a liar should be called a liar.