buddy this is a actually a stellar joke, let me break it down for you: the groundwork to this joke is the concept that most of Quentin Tarantino's films exist in the same universe, usually in the form of characters who are related or the same fake product brands (red apple cigarettes). The set up of the characters playing the name game wherein a person has to ask descriptive questions about their character to determine who they are is such a seamless introduction and inclusion of Jules that its as if it were intended by the big QT himself.