Depends on where she is cognitively. If she doesn't remember asking the question, having the answer written down somewhere she will not remember writing it down will just mean that there are four different places that say "Deb is HOME!!!" Someone who has normal memory and just isn't paying attention is in a very different place from someone whose cognitive function is impaired by meds or pain (or, sadly, both).

My example was a real example from my life: when my mother was just back from Spain last year around this time, my beloved great-aunt was in a REALLY bad pain flare and had to be on more meds than usual. Whether Deb was home from Spain was foremost on her mind. It was really, really important to her. She had a habit of taking notes on our conversations. And she still asked me four different times, because that's where the meds had her that week. And I answered patiently and cheerfully each time, and the last three times I got in the car/got off the phone and cried. But: I removed myself before I cried. I didn't get sarcastic with her, it wasn't her fault. I went and had my emotions where it wasn't going to hurt the main person who was suffering.