 One objection to HOT theory is due to Dretske (1993). We are asked to imagine a case in which we carefully examine two line-drawings, say (or in Dretske’s example, two patterns of differently-sized spots). These drawings are similar in almost all respects, but differ in just one aspect—in Dretske’s example, one of the pictures contains a black spot that the other lacks. It is surely plausible that, in the course of examining these two pictures, one will have enjoyed a conscious visual experience of the respect in which they differ—e.g. of the offending spot. But, as is familiar, one can be in this position while not knowing that the two pictures are different, or in what way they are different. In which case, since one can have a conscious experience (e.g. of the spot) without being aware that one is having it, consciousness cannot require higher-order awareness.