I See You by Fallnangeltears.
This is the brilliance of the Joker. The illusion of choice. He give Dent the option to kill him right then and there, to end his madness or join it’s ranks. The choice is simple, because there isn’t one. Look at the Jokers finger. Even if Dent pulled the trigger, the hammer wouldn’t fall.
"Do I look like a guy with a plan?"