I had an elderly neighbor who unfortunately suffered from this. I spoke with her off-and-on over the first year or so, and she loved to talk. She would tell me about her daughter and grandkid, things that she saw that day, etc.

It was all very plausible but I always felt like there was something off about her. Then one day she told me a story about me, and things I’d said, done, and experienced and it was all absolutely made up, from the overarching plot down the finest details. It never happened, couldn’t have happened, and couldn’t have been even something that happened to someone else.

I tried to politely correct her at first, but she was so certain that she began worrying about me and why I couldn’t remember so I decided to just stand and nod to avoid stressing her out.