Detective William Murdoch: A fire-fighting robot, George?
Constable George Crabtree: Yes sir. Er... imagine it, with heat sensing eyes, moving towards the fire wielding a hose. Can one build such a thing, sir?
Detective William Murdoch: I suppose. Have you considered the potential effect such a machine will have on human kind?
Constable George Crabtree: Well, yes. This one would put out fires.
Detective Llewellyn Watts: Hmm, but if these robots can supplant a person's vocation, the very source of meaning in life, what will become of that?
Detective William Murdoch: In this case, it would take over a dangerous occupation, potentially saving lives.
Detective Llewellyn Watts: And what happens when this automation spreads to other duties, like our own?
Constable George Crabtree: [laughing] A robot-constable, sir. Robo-copper.