[quote]What is the explanation of Master Chief receiving the gifts from the Librarian if she is dead? [/quote] She copied her consciousness into a machine. [quote]Again, in Spartan Ops Halsey gets to the Librarian. Where is she, and if she's dead how is this happening?[/quote] Another copy. [quote]Promethean Knights were composed humans, but what are the Crawlers and Watchers? Their dogs and birds?[/quote] Maybe. Maybe bits and pieces of people that couldn't form a Promethean. Maybe pure artificial constructs. Too slow LordofAdmirals.