 In order to understand the two arguments intended to establish the conclusion that we have a singular, immediate representation of space, it is helpful to recall Kant’s attitude toward concepts. From his point of view, whereas to fall “under” a concept means to be part of a concept’s extension, to fall “within” a concept means to be part of its intension. Just as significantly, the extension of a concept, in Kant’s way of thinking, is not the things that instantiate the concept, or the set of things to which the concept “applies”; rather, it is the class of concepts that function as sub-groupings falling under this more general heading. This idea requires clarification.