For most of us, a person's face makes up a big part of his or her identity. (Note: not that person's personality, but his or her identity – for example, when we imagine a person in our minds, we might picture the face first.) If Christopher is uninterested in faces, then what are the important factors in identifying a person?

Christopher innocently calls this "two interesting facts," but he might also have written "two things people believe about Sherlock Holmes that really aren't true." What's his motivation behind debunking these myths?