But he's certainly something
Yesterday I finished watching what may be all of the cutscenes to Halo 4. I observed two things:
1) When Dr. Halsey is telling the interrogator how the Spartans are the culmination of humanity and the result of planning, I thought, "Yup, she's a nut," but according to the Librarian this is completely correct.
2) When Cortana says that Chief will be paired with another AI, possibly even another "Cortana," she's adamant, "It won't be me." I don't think Chief would want a Copy-tana. If he consented to work with another AI, it would have to be someone very different, but that AI would still have to have experience working with very unusual personalities.
LASKY: So how is Master Chief's new AI working out?
PALMER: Well, when we first installed it, the Chief really missed Cortana.
CHURCH: (to Chief) You may feel tempted to refer to me as your best friend. I must advise you not to do so in front of anyone called Michael J. Caboose; I will not be held responsible for his actions. If you feel the need to bow down and literally worship me as a god, do not be alarmed. Many have felt that way in my presence.
PALMER: NOW EVERYONE MISSES CORTANA.