system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman] Dear doctors, what mental disease does Joker suffer from?
gpt
Depending on who you ask, and when you ask them: all of them or none of them.

The man might be little more than a lumbering, human-shaped stack of insanity, held together by duct tape, makeup, and countless years of trauma.

*or*

the Joker could be playing the world's worst madman as the world's best actor - capable of continually and convincingly fooling the Greatest Detective himself. 

The motive of his madness, if it even exists at all, is likely as indescribable and capricious as the man himself. Trying to get an accurate prognosis of the Joker - where the freakin' Batman has failed - would be harder than squeezing blood from a rock. Of course, nobody's ever gotten a straight answer from the Clown Prince of Crime regarding his mind - the last person to do that turned into his girlfriend (*shudders*) - but you are more than welcome to pick his brain and become the latest in a long and unbroken line of tragedies.