something about the film "Blade Runner"

1982's "Blade Runner" is a noir-ish, dystopian, science fiction film directed by Ridley Scott and starring Harrison Ford and Rutger Hauer. In 2019 powerful corporations have manufactured genetically engineered organic robots called replicants to do dangerous and menial work on off-world colonies. Replicants are almost indistinguishable from humans, but they are engineered to live short lives--a few years, max.

When some replicants rebel on one of the colonies, they are banned from Earth; any of them discovered back on Earth are hunted down and "retired" by special operatives known as Blade Runners. The film tells the story of a group of recently escaped replicants hiding in Los Angeles, and the veteran Blade Runner, Rick Deckard (Harrison Ford), hired to hunt them down.

The Tyrell Corporation is a major producer of replicants. Their slogan, "More Human Than Human," encapsulates the philosophical, physiological, and moral dilemma posed by the film: What does it mean to be human?

The slogan "More Human Than Human" doesn't merely pitch the advanced abilities of the intelligent, physically gifted replicants. It seems to differentiate and dehumanize replicants. It focuses on their otherness, and encapsulates it in the word more. But is there a difference? Can one human be more human than another?

Roy, played by Rutger Hauer, represents the newest, most advanced model of replicant. As the film's action rises, Roy breaks into the the penthouse occupied by the CEO of the Tyrell Corporation and demands more life from his maker. His manner is sinister, but his needs are all too human. At the end of the film, as his life runs out, Roy, resigned to his inevitable death, delivers a monologue regretting how his memories are about to be lost forever.

The film leads us to conclude that our protagonist, Deckard, is nothing more than a murderer. Does he share this view of himself? In the version of the film with voice-overs, he only refers to himself as a killer.
  

Notes: 

• The screenplay is loosely based on a Philip K. Dick novel.
• Drawing distinctions between peoples helps justify killing.