They are not dead rITEN... Check this.... THE WRITERS HAVE DISCREDITED THESE THEORIES * The survivors are dead and/or in Purgatory. Source- http://tv.zap2it.com/tveditorial/tve_main/1,1002,271%7C94107%7C1%7C,00.html * The survivors are in a time warp. * Spaceships or aliens influence the events on the island. Source for the two above- http://www.scifi.com/scifiwire2005/index.php?id=30246 * Everything seen is a fictional reality taking place in one or more of the survivors' minds. Source- http://losttv-forum.com/bonus/interview.htm * The "security system" is a dinosaur. Source- http://www.lost-tv.com/exclusives/damon081804.html