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The question of whether Deckard is intended to be a human or a replicant has been an ongoing controversy since the film's release. Both Michael Deeley and Harrison Ford wanted Deckard to be human, while Hampton Fancher preferred ambiguity. Ridley Scott has stated that in his vision, Deckard is a replicant. Deckard's unicorn-dream sequence, inserted into Scott's Director's Cut and concomitant with Gaff's parting gift of an origami unicorn, is seen by many as showing that Deckard is a replicant – because Gaff could have retrieved Deckard's implanted memories. The interpretation that Deckard is a replicant is challenged by others who believe the unicorn imagery shows that the characters, whether human or replicant, share the same dreams and recognize their affinity, or that the absence of a decisive answer is crucial to the film's main theme. The film's inherent ambiguity and uncertainty, as well as its textual richness, have permitted multiple interpretations.