David on Consciousness

“In retrospect, today's entire dreaming and waking consciousness may prove to be only minor variants on a theme whose motif can't be grasped from within.”

“The most that the extra-neural environment can ever do is partially select which of a finite menu of mind/brain/virtual world states is instantiated at a given moment. Subjects can never, directly, do more than apprehend their own mind/brain/virtual-world states. The values they appear to find in the mind-independent world are instead intrinsic features of particular states of their own brains.”

“Another useful way to avoid confusion [used by e.g. Allen Newell 1990 Unified Theories of Cognition] is to reserve the term "consciousness" for the phenomena of experience, using the less loaded term "awareness" for the more straightforward phenomena... If such a convention were widely adopted, communication would be much easier; as things stand, those who talk about "consciousness" are frequently talking past each other.”

“Why doesn't all this information-processing go on "in the dark", free of any inner feel? ...We know that conscious experience does arise when these functions are performed, but the very fact that it arises is the central mystery. There is an explanatory gap [a term due to J. Levine, "Materialism and qualia: The explanatory gap" Pacific Philosophical Quarterly 64:354-61, 1983] between the functions and experience, and we need an explanatory bridge to cross it.”

“The easy problems of consciousness are those that seem directly susceptible to the standard methods of cognitive science, whereby a phenomenon is explained in terms of computational or neural mechanisms. The hard problems are those that seem to resist those methods. ...The really hard problem of consciousness is the problem of experience. When we think and perceive, there is a whir of information-processing, but there is also a subjective aspect. ...When we see, for example, we experience visual sensations: the felt quality of redness, the experience of dark and light, the quality of depth in a visual field. Other experiences go along with perception in different modalities: the sound of a clarinet, the smell of mothballs. Then there are bodily sensations, from pains to orgasms; mental images that are conjured up internally; the felt quality of emotion, and the experience of a stream of conscious thought.”