Ridley Scott's bleak vision of the future

Blade Runner is the story of a future world in which genetically engineered "replicants", artificial life forms designed to be indistinguishable from humans, are used as slave labor on off-world colonies. The only way to distinguish a human from a replicant is to administer a complex psychological test designed specifically to test for emotional responses. Replicants, who have no emotions, respond to the test differently than humans. Because of a recent revolt on an off-world …

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