I talk in my sleep and my father and some roommates have had full conversations with me, to include them asking me questions and me answering them. The upshot is that I apparently don't always give accurate answers. For example, one roommate recounted me insisting that I needed to fill up the water tank in my car. When asked what I was talking about, I responded along the lines of "you know, so it will have power to drive". Not only was the "water tank" portion problematic, I didn't even have a car at the time.