After reading your Wikipedia copy and paste, I think we're having what I call a Clinton Issue. You say a high ankle sprain IS a fracture. In this case, IS doesn't mean what you think it does. A fracture can be part of or accompany a high ankle sprain, but if you actually read the whole article, a high ankle sprain does not necessarily involve a fracture.
You most certainly do have different degrees. And the reason Taylor could run straight in a line but not cut.. Remember him standing like a statue against the Oklahoma rushing the 4th quarter??? It's cause he had the broken bone which caused him extreme pain. It wasn't going to get any worse is why he played on it. Did you honestly not know this???