One of the things that I think the Prime Minister did not quite convey or understand, or forgot, is that the backstop is a compromise. It is a compromise based on the fantasies of the technologies that she has promised will come. If she is right and those fantasies are true, she does not need to worry about the backstop. She would not need to worry if the technology that is being used on the Swiss border were available. I suggest that the Europeans have used a backstop because they know that the fantasies are exactly that.