 One of the advances made in the last few decades has been to distinguish between different questions concerning consciousness (see particularly: Rosenthal 1986; Dretske 1993; Block 1995; Lycan 1996). Not everyone agrees on quite which distinctions need to be drawn. But all are agreed that we should distinguish creature consciousness from mental-state consciousness. It is one thing to say of an individual person or organism that it is conscious (either in general or of something in particular); and it is quite another thing to say of one of the mental states of a creature that it is conscious.