- last post: 01.01.0001 12:00 AM PDT
The AI lifespan is 7 years.
Yes, they are light-years apart, however, Bungie also said in the WWU that "something is very wrong" about Cortana. So I'm guessing that she's gone Rampant because of her contact with Gravemind- if he's truly a "monument to sins"- he has kind of a timeless feature about him, like he has a lot of ancient knowledge. If Cortana learned things about the past from him, it could have overloaded her and sent her into Rampancy.