 The final theory he considers is what he calls “magical ersatzism”. Unlike the previous two theories, this theory is defined negatively. The magical ersatzist is defined by their denial that possible worlds represent, or at least that they represent in either of the two ways (linguistic and pictoral) that we are familiar with. And Lewis’s primary complaint is that this kind of theory is mysterious, and that it could only seem attractive if it hides from view the parts of the theory that are doing the philosophical work. Lewis argues that as soon as we ask simple questions about the relationship that holds between a possibility and actuality if that possibility is actualised, such as whether this is an internal or external relation, we find the magical ersatzist saying things that are either implausible or mysterious.