 One long-standing interpretation, the Representationalist interpretation, says that for Descartes the objects immediately presented to the mind (by way of an idea) are purely mental objects. This interpretation emphasizes Descartes’ saying that such objects are solely in the intellect, as when he says to Caterus that the object of which the mind is immediately or directly aware when having the idea of the Sun “…is not an actual entity, that is, it is not a being located outside the intellect…” (AT VII 103; CSM II 75) The object at which the mind is directed, the immediate object of awareness, is not the Sun itself, but is instead a purely mental object, which represents (or stands for) the Sun in the heavens. This purely mental object is said to constitute the content of the idea. On this view, an idea is sometimes referred to as a tertium quid, a third thing, which “stands between” the mind’s eye, so to speak, and the object that the idea represents.