Brain

An organ that any organism more advanced than a sea squirt has. Used by humans to reason up wonderful things such as Civilization, Science, and Technology. A properly functioning and programmed or 'Educated' brain is the most lethal weapon a devotee of Logic and Reason has in his fight against Stupidity, while an improperly-functioning one is defined variously as mental illness or stupidity. Failure to use the brain one has responsibly can result in what is colloquially referred to as 'a world of hurt', 'Charlie Foxtrot', or 'Shitstorm'.