Multiplication of beings

When my kids were little and required a watchful eye, I would sometimes have dreams that duplicates of them would appear. So for instance, I'd dream I'd just helped the ninja girl into the car, but here is another ninja girl. It was bewildering. It wasn't a case of one being a fraud, or of my somehow overlooking that they were twins; it was just pure duplication. It was like when you add a stitch accidentally in knitting. There was just one of her, but now there are two of her. Occasionally I...