SteveKlinko wrote: ↑November 26th, 2021, 2:18 pmLet's take an engineering analysis approach where we trace the path of Light perception. The first thing that happens is that Physical Light (PL) enters the Eye and is focused onto the Retina. The instant the PL hits the Retina it activates the Rods and Cones. Various wavelengths of PL will preferentially activate various different Rods and Cones. The PL is absorbed by the Rods and Cones and the PL is no longer PL. What is left is an avalanche of chemical reactions that eventually fires a Neuron that sends a signal away from the Retina and to the Visual Areas (VAs) of the Cerebral Cortex. This happens for millions of Neurons at the same time with the signal from each Neuron bundled into the Optic Nerve. It’s a long journey from the Retina through the Lateral Geniculate Nucleus (LGN) of the Thalamus and to the Visual Areas which are located in the back of the head. During this whole trip from Eye to the VAs we are not dealing with PL anymore but rather this is of course Neural Light (NL). The NL signals eventually arrive at the first Visual Area (V1) get processed and are then sent to the second Visual Area (V2) and on to other Visual Areas V3, V4, V5, and more. All the areas also send signals back to previous Areas to create a giant mish mash of parallel processing that is difficult to completely quantify. All the processing and feedback is also NL since it is correlated with the PL. So, all we can really say is that we Experience NL not PL. We know when this NL happens that CL happens. The CL cannot be found in the Brain, and maybe someday it will be found there. But for now, we can only speculate that it is in some other Realm or Dimension or Space. I say CL is in Conscious Space (CSp). We can then speculate that there must be a Conscious Mind (CM) that exists in CSp, that is experiencing the CL. A similar argument can be made if we trace the path of Physical Sound (PS) to Neural Sound (NS) and then to Conscious Sound (CS).
The subjective "realm or dimension or space" of phenomenal consciousness isn't "transcerebral", let alone supernatural/hyperphysical. Phenomenal space and phenomenal time are realized
within the physical space and the physical time of the brain. The conscious mind with its experiential contents (sensations, emotions, or imaginations) is wholly part of the brain, being a distinctive high-level type of neural (neuroinformational) organization.
Of course, even if subjective experiences are constituted by and thus identical to complexes of objective and externally perceptible neural processes, there is still a
qualitative perceptual difference between e.g.
your seeing a red tomato and
my seeing the neural process which is your seeing a red tomato. For
experiencing and internally perceiving a red-impression is certainly qualitatively different from
externally perceiving the experiencing of a red-impression that takes place in your brain. As opposed to your seeing of a red tomato,
my seeing of your seeing of a red tomato doesn't or needn't involve any red-impressions. But it doesn't follow that there is a
numerical difference between the object of my external perception, viz. some neural process, and your internally perceived experiential content, e.g. some red-impression.
A neural process which
is an undergoing of a red-impression certainly doesn't
look red to external observers—unless red is intentionally used in the context of technological neuroimaging to
represent aspects of the neural process. But what looks red then are parts of
the image or picture of the neural process rather than the neural process itself, which may not be directly visible to the natural eye.
If experiences
are neural processes, you cannot
internally perceive your experiences
as neural processes, and I cannot
externally perceive the neural processes in your brain
as experiences; but this perspective-relative (1st person vs. 3rd person)
perceptual difference doesn't amount to an
existential (ontological) difference, and to a confirmation of dualism (antireductionism) about subjective experience.