Somewhere in here you talked about lunch with the Alzheimer's Admiral. You can say as much as you want to him about the world around him but in his mind, he was six. A point was probably reached, and I am assuming here, that it became useless to continue to attempt to tell him of the reality of the world and bring him back from his own little niche. So what does one do? They make his body comfortable and let him ramble and only interject form time to time for there are others that require your help and that to continue to attempt to help the Admiral see reality, you are expending energy that is being wasted for the Admiral will see only what he wishes to see regardless of the evidence in front of him.
That can be applied to many things.