The Philosophy of Possible WorldsImagination, Creation, and SubcreationDegrees of SubcreationStory vs. World: Storytelling and World-buildingInvention, Completeness, and ConsistencyInventionCompletenessConsistencyImmersion, Absorption, and SaturationWorld Gestalten: Ellipsis, Logic, and ExtrapolationCatalysts of SpeculationConnecting the Secondary World to the Primary World