Hello, my 87 year old mother is very forgetful and has anxiety but recently has started doing this: example, a man in the cafe we were in dropped a plate and it broke. My mother stated "Oh he did that last week". I knocked over a stack of reading glasses when with her in the supermarket and she stated "You did that last week" This is now every time something out of the normal happens. She recognises people we have never seen before. Is this a sign of general decline or dementia? Has anyone experienced this with an old person before?