Mom had a car accident in 2011. Since then she has not had a car. It was a total loss, no license, but for 5-6 days she's demanding to know who took her blue car because the tags are due. She's never owned a blue car. I tried the "it's in the shop, I'll get it tomorrow" but that leads to, let's go get my car the next day! I tried the whole accident story and that leads to same question 4-5 hours later. I tried the you didn't own a blue car and that just makes her mad. Actually whole topic is making her mad. Last statement was "You're just trying to make me seem crazy and keep my car". Any other ideas? She's usually not so angry or obsessed. Things don't usually carry over for days. Most of her faulty memory is founded on truth never something like a blue car she never owned. Nobody in the family owns a blue car either.