(from a Letter to the husband caregiver of a wife with Alzheimer’s Disease)
I’d be surprised if there’s anyone [caring for a loved one with Alzheimer’s Disease] who hasn’t experienced the endlessly repetitive questions.
Your wife asks the same question again and again because she does not remember you’ve just answered it―or even that she has ever asked it before. But for some reason she does remember it’s important to her to know the answer, so she asks. Because she knows she can depend on you to know the answer.