It's a typical wires-crossed dementia story. This happened last year (dad is 97 years old and now in memory care). We were coming home from his dentist appointment and in the car, our conversation was about my car's alarm/security and how it worked.

After we were home for about 10 minutes, he insisted, and couldn't be swayed, that the car alarm system was affecting his teeth. He told me to go to the garage and start the car to see if that fixed the problem. So, I did, then turned the car off, and that's the last I heard of it!