"What I have always wondered is why the Tyrell Corporation made their androids so lifelike. Why not give them four arms and settle the matter, and get more work out of them? Is there a buried possibility that Tyrell's long-range plan is to replace humans altogether? Is the whole blade-running caper simply a cover for his scheme? But never mind. What matters to the viewer is that the ground rules seem to be in place, and apply in one of the most extraordinary worlds ever created in a film."