Definitely. It reminds me of the psychotherapist Oliver James who wrote a book with his MIL (Penny Garner) after he realised she was on to something from observing her own mother in the grip of dementia:
Garner's ideas evolved as a result of caring for her mother, Dorothy Johnson, when she developed Alzheimer's. One day, they were sitting together in a doctor's waiting room when out of the blue Dorothy said, "Has our flight been called yet?" Garner was mystified and played for time. Her mother anxiously looked around and said, "We don't want to miss it, where's our hand luggage?" Suddenly, Garner realised what was happening. Her mother had always loved air travel and Dorothy was making sense of this crowded waiting situation by assuming they were in a departure lounge. When Garner responded with "All our luggage has been checked in, we've just got our handbags," her mother visibly relaxed .