distinction between nature and culture in 'Bladerunner'

How does the existence of 'replicants' complicate the distinction between nature and culture in Bladerunner? Replicants, engineered to be "more human than human", blur the distinction between nature and culture by the very success of their humanity. We need to have a clear understanding of what is meant by the terms nature and culture. In the introduction to his book, Schelde believes culture to be "a distinctive human domain" . He believes humans have a need …

…Making of Bladerunner: issues in Ridley Scott's Bladerunner and Philip. K. Dick's Do Androids dream of electric sheep? (Bowling Green, Ohio: Bowling Green State University Press, 1991.) Schelde, Per. Androids, Humanoids and Other Science Fiction Monsters (New York: New York University Press, 1993.) Scott, Ridley, director. Bladerunner (videorecording). Screenplay by Hampton Fancher and David Peoples. (United States: Warner Home Video, 1993.) Tellote, J.P. Replications: A Robotic History of the Science Fiction Film. (Urbana: University of Illinois Press, 1995.)