WAAAALLLLLLLLLTTTTTTTTTTTTTTTTTTT!
Lost has always addressed as one of its main themes the nature of identity. Whether in an overt way, as Sawyer’s “real” name being James Ford or Hurley’s being Hugo Reyes, or in a more subtle manner, as when Boone tells everyone he’s a lifeguard when trying to revive Rose in the pilot but later tells Jack he’s a businessman, roles and duplicates and opposites are a main function of character.