A contradiction arises when two ideas each make the other impossible. Contradictions don't exist in reality because reality simply is as it is and does not contradict itself. Only our evaluations of reality can contradict each other. If you think you have found a contradiction, then check your premises. Either you're mistaken about it being a contradiction or one of the contradicting concepts has been improperly formed.

If the content of your knowledge contains contradictions, then some of your knowledge is in error. Because in order to be successful in reality one must know reality, success requires correct knowledge. It is therefore important to continually search for and root out contradictions in your knowledge in order to make sure that your knowledge corresponds to reality. The two primary methods for doing this are logic, the art of non-contradictory identification, and integration.