"The Joker's a special case. Some of us feel he may be beyond treatment. In fact, we're not even sure if he can be properly defined as 'insane' . . . We're beginning to think it might be a neurological disorder, similar to Tourette's Syndrome. It's quite possible we may actually be looking at some kind of super-sanity here. A brilliant new modification of human perception. More suited to urban life at the end of the twentieth century. Unlike you and I, the Joker seems to have no control over the sensory information he's receiving from the outside world. He can only cope with that chaotic barrage of input by going with the flow. That's why some days he's a mischievous clown, others a psychopathic killer. He has no real personality. He creates himself each day. He sees himself as the Lord of Misrule, and the world as a theatre of the absurd."