That is your false assertion, given without proof, or even a reply to post 19, which explained to you that EVERY NERVE DISCHARGE PRODUCES MORE ENTROPY.... The brain does a lot of work because it has low entropy, ...
I.e. the entropy reducing work of the nerve cell's "Sodium Pump" is destroyed by nerve discharges just as the entropy reducing work of men neatly stacking up a tower of brick is destroyed when they are pushed over.
Did you even read post 19? - It clearly explains that all of brain information processes, such as nerves firing, are entropy producing. They destroy the reduction of entropy made by the sodium pumps of the brain cells.
BTW I discussed, in post 7, the fact that a great deal of processing does occurs in the retina, noting that it had to as the information transfer capacity of the optic nerve is about 50 times less than the rate retinal cells collect information. I agreed that much of this is closely related to edge detection but I tend to be more general and call it "data compression" as there is more to it than just edge detection AND the edge detection of the retina does not have any orientation data with it. Only at in that region nearby cells have different levels of illumination. "Edge detectors" in V1 (and the fact they are orientation sensitive) is why Hubble and Wessel got the Nobel prize.
Most workers in neurology hold my POV that edge detection is the process H&W described in V1 and the retinal processing is data compression, even though much of the data that makes it thru the optic nerve is where their are contrast boundaries (edges). The difference it that the retina data transmitted does not "tag" the edges with information about the orientation of those contrast areas as V1 does. I further discuss the important fact that these orientation sensitive edge detectors in V1 mutually interact in V1 with nearby other edge detectors. I.e. like orientation edge detectors mutually stimulate each other whereas orthogonal ones mutually suppress each other.
Read my discussion of this in post 9, whcih show how this mutual interaction between V1 edge detectors allows the CONTINUOUS visual field of stimulation to be parsed into objects. (There are no "objects" separated one from another in the retina. That is built on V1's edge detectors mutual interactions.)
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