for example, we experience visual sensations: the felt quality of redness, — Nagel/Chalmers
We
prepare to point appropriate symbols at the stimulus: pictures of just the right shade, words selecting the right pictures. And we prepare to point other symbols at the biological activity that we infer effects the process of preparation. We find it useful, and generally harmless, to equivocate (in talk and in thought) between word, picture, stimulus, associated stimuli, and neural process. Unsurprisingly we often have to unpick an apparently reliable (because habitual) account alleging that a picture glows, somewhere inside our head.
the experience of dark and light, — Nagel/Chalmers
The need to prepare to select pictures having the right luminosity when illuminated, so as to associate the stimulus with an appropriate range of stimuli, and of words and of objects.
the quality of depth in a visual field. — Nagel/Chalmers
Pictures satisfying learnt pictorial conventions of perspective.
Other experiences go along with perception in different modalities: the sound of a clarinet, — Nagel/Chalmers
Not another experience in the sense of another wonderful ghostly correlate of neural activity, but another (wonderful) physical process of readying to select among sounds to associate with the presented sound, thereby contributing to an ongoing classification and ordering of the world of sound events. A process soaked in the same multiple confusion of use with mention: reference to stimulus with reference to symbol; symbol with neural readying for use of symbol; stimulus with neural readying for use of symbol.
the smell of mothballs. — Nagel/Chalmers
Where the associations may be especially deep and cross-modally disruptive.
Then there are bodily sensations, from pains to orgasms; — Nagel/Chalmers
There is physiological trauma and convulsions, and there is interpretation of these through language and other symbol systems. And with the interpretation, endemic intellectual confusion, and habitual implication of an internal observer.
mental images that are conjured up internally; — Nagel/Chalmers
In a manner of speaking, which benefits from translation into literal analysis, in terms of preparation to manipulate and interpret diagrams and
visual talk.
the felt quality of emotion — Nagel/Chalmers
The physiological turbulence, and then the interpreting it through language and other symbol systems, especially (and usefully and often truly) with respect to social and physical threats and opportunities.
and the experience of a stream of conscious thought. — Nagel/Chalmers
The tendency to confuse the continuity of actual scenery with the continuity of an internal picture show.
what unites all of these states is that there is something it is like to be in them. — Nagel/Chalmers
There is a topography of more and less appropriate linguistic (and otherwise symbolic) interpretations and reactions to the situation in which the organism finds itself.
All of them are states of experience. — Nagel/Chalmers
But not of a ghost in the machine.