Based on a story by Philip K. Dick written in 1968 "Do Androids Dream of Electric Sheep?" the movie was made in 1982 and set in Los Angeles 2019. Among the STARS of the movie is THE BRADBURY BUILDING in downtown Los Angeles which I've been in a few times many decades ago.
As to my question. Allegedly Harrison Ford believes Deckard is a human. The Director Ridley Scott believes he is a replicant. The author leaves it to the reader to decide.
Of course that it is set in Los Angeles in a "future time" which is now our past made it very appealing to me to watch. It is an unsettling movie on many levels not the least of which is the incredibly enormous number of jammed humans living there. Overpopulation. Teeming with humans and replicants. Too crowded to provide any quality of life. Filmed darkly. Dark is depressing. The film is too from my point of view. Had I seen it in 1982 it would have been experienced differently. How I don't know. Glad I saw it. Thought-provoking and puzzling. Just like life.