Again though, you are dodging the question. With everything else the guards do acknowledge you honestly believe that acknowledging the outcome of the 6 main quests is impossible?
In all my 107 hours of gaming so far the NPCs have reacted accordingly to what I have done. Of course sometimes a misplaced comment will happen (it's just a game remember?) but I can easily suspend my disbelief to find an explanation for what happened. I.E: In the Blood on Ice quests the tavern owner keeps telling me about her waitress' behavior even after she was murdered. I just assumed it must have been tough for her to cope with the tragedy so she refuses to accept this new reality. Then I move on and keep playing, I don't come to the forums to nitpick on something that has little impact on my gameplay.
As I said before this is a computer program designed to create an illusion of a real world. When you watch an illusionist's show, if you ever did, you know that everything he's performing is fake, not real. They have their amazing acts that makes it looks like they really have superpowers but they also perform more trivial acts that if you pay real attention to you can easily say how it's done. But you don't, you just suspend your disbelief to have a good time (unless you want to pi$$ everyone around you).
That's how Skyrim works. You know it's fake, you know it's not a real world, and if you don't have the will to play along then you spend too much time getting annoyed by the little things and too little time having fun.