 Leibniz’s limbo illustrates an explanatory trap. To explain why something exists, we standardly appeal to the existence of something else. There are mountain ranges on Earth because there are plates on its surface that slowly collide and crumple up against each other. There are rings around Saturn because there is an immense quantity of rubble orbiting that planet. This pattern of explanation is not possible for ‘Why is there something rather than nothing?’. For instance, if we answer ‘There is something because the Universal Designer wanted there to be something’, then our explanation takes for granted the existence of the Universal Designer. Someone who poses the question in a comprehensive way will not grant the existence of the Universal Designer as a starting point.