"While the film is loosely based on Philip K. Dick's "Do Androids Dream of Electric Sheep", the title comes from a book by Alan Nourse called "The Bladerunner". William S. Burroughs wrote a screenplay based on the Nourse book and a novella entitled "Blade Runner: A Movie." Ridley Scott bought the rights to the title but not the screenplay or the book. The Burroughs composition defines a blade runner as "a person who sells illegal surgical instruments"."
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