  Whatever their respective merits, both HOP and HOT theories face some common challenges, including what might be called thegenerality problem. Having a thought or perception of a given item X—be it a rock, a pen or a potato—does not in general make X a conscious X. Seeing or thinking of the potato on the counter does not make it a conscious potato. Why then should having a thought or perception of a given desire or a memory make it a conscious desire or memory (Dretske 1995, Byrne 1997). Nor will it suffice to note that we do not apply the term “conscious” to rocks or pens that we perceive or think of, but only to mental states that we perceive or think of (Lycan 1997, Rosenthal 1997). That may be true, but what is needed is some account of why it is appropriate to do so.