Miaphysite Christology Counting Natures Counting is the aggregation and composition of numbers If I count four dogs, it means I have one unit of dog, another unit of dog, another unit of dog and another unit of dog. Now if I see a unit of human, that would not be countable with the four dogs. It's a separate category.  x + x can be added to 2x But x + y cannot be added to 2, rather they are just a single unit of (x + y) The human nature and the divine nature are categorically different, so they cannot be two natures Counting assumes the category of enumerability. Identity assumes the category of predication. To count by identity is already a category error.