This article is from the rec.arts.sf.movies FAQ, by Evelyn C. Leeper firstname.lastname@example.org with numerous contributions by others.
This, and lots of other BLADE RUNNER questions, are hashed out in a
separate BLADE RUNNER FAQ posted monthly to rec.arts.movies.misc,
alt.cult-movies, alt.cyberpunk, and rec.arts.sf.movies by
However, Ridley Scott has confirmed that deckard was a replicant.