Premise: The Justice League , also known as the Justice League of America ( JLA ) , is a fictional superhero team appearing in American comic books published by DC Comics . Metropolis is a fictional city appearing in American comic books published by DC Comics , best known as the home of Superman . Superman is a fictional superhero appearing in American comic books published by DC Comics . Superman resides and operates in the fictional American city of Metropolis .
Hypothesis: Superman is a Marvel Comics character.
Label: CONTRADICTION