"... how do you describe that moment when the lights go out in someone's eyes and the darkness takes over? They become something you can't reason with, something whose conscience you can't appeal to-like a shark or a machine. They look human, but they're not. Not in the sense that the majority of us understand, anyway. They have no moral code. They become less than human-inadequate, incomplete. And that incompleteness can make them dangerous, even...