- last post: 01.01.0001 12:00 AM PDT
The AI is a city AI. He/She's not a "smart" AI like Cortana. In other words, Cortana has a well developed Intelligence to the point where she can do whatever she wants. The Superintendent can only deal with City related issues, so when the war breaks out, he can't really "think" about the war.
So when he tries to communicate with ODST's he can only talk to them with a pre-configured set of dialogues which were made for specific city related issues.
Get it now?
Keep it clean can mean many things when he says it to ODSTs, but in reality that phrase was made for the citizens, advising them to keep it clean.