"Blade Runner" is based on a short story by Phillip K. Dick. Its dystopian vision of a future in which humans have enslaved their own creations touches on many themes that arise from discussions of AI: Are we different from machines in some fundamental way, or could machines be sufficently human to "pass" (ie to pass the Turing Test). What makes us human? Is it our intelligence, or our compassion? And if it is our compassion, then what happens in a world where humans are increasingly without feeling, and robots are increasingly emotional?