Anne has small superstitions which she uses to dispel anxieties. For instance, if she can make it to the fourth stain on the carpet by the time the elevator door closes, that means Nate has thought positively about her today, and there is a future where they know each other. It becomes a one-sided competition when a negative consequence is imagined: if she cannot touch two different kinds of tile with her feet by the time the toilet flushes, that means she said something crucially “wrong” in an email, and Nate will never contact her again. She doesn't keep track of which side is winning.