Sy Borg wrote: ↑July 11th, 2021, 10:04 pmConsul wrote: ↑July 11th, 2021, 2:09 pmUnless experiences are neural processes, they are externally imperceptible; and even if they are externally perceptible (with the help of neuroimaging technology), they are not externally perceptible as experiences. For externally perceiving an experience had by somebody else is unlike experiencing it oneself.
#2. Wakefulness as a state of a subject is one thing, and the intensity of an experience is another. An experience E1 can be weaker than an experience E2 in the sense being less intense, but this meaning is different from my 2*! You can be fully awake and have very feeble experiences.
#3. As for the temporal form of consciousness: https://plato.stanford.edu/entries/cons ... -temporal/
#4. If by "mentality" you mean the cognitive, intellectual, or "noetic" department of the mind, I doubt that experientiality is independent of mentality. I think there is no entirely "anoetic" experiencing of experiences; that is, totally cognitively non-accessed or non-apprehended experience is non-experience.
I think the global-workspace theory of consciousness is basically correct: There is nothing experiential/phenomenal about an inner process which doesn't enter working memory and becomes a target of attention. This is true even of the most primitive subjective sensations, so phenomenal consciousness (affective consciousness) isn't independent of "access consciousness" (cognitive consciousness). There is no first-order experiential consciousness without any intellectual consciousness of it.
This is not to say that experience depends on explicit and deliberate self-reflection in the form of linguistic thought about it, in the sense that you cannot have an experience without thinking you're having it; but some degree or level of inner awareness (cognition, perception) of it through attention is necessary for its occurrence.
Re #1: "externally perceiving an experience had by somebody else is unlike experiencing it oneself."
There was an episode of Black Mirror, where a medical company had developed a device that allowed doctors to feel what their patients felt as a diagnostic tool. Of course everything goes pear-shaped, but utilising our other senses - feeding data to them - will broaden our range of inquiry. Consider how LIGO has expanded cosmologists' ability to better understand what happens in space by utilising gravity waves. There's also been sonic analysis of wavelengths emitted by cosmic objects, which can sometimes give a clearer, more visceral, sense of what is going on. Immersive VR technology may be helpful. At this stage we know very much less than is generally claimed on philosophy forums.
It's one thing to feel an experience in myself which is qualitatively identical to (but numerically different from) an experience someone else feels, and it's another thing to externally observe that experience within the other subject's brain.
By the way, Herbert Feigl devised the idea of an "autocerebroscope":
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"…with the help of an autocerebroscope. We may fancy a 'compleat autocerebroscopist' who while introspectively attending to, e.g., his increasing feelings of anger (or love, hatred, embarrassment, exultation, or to the experience of a tune-as-heard, etc.) would simultaneously be observing a vastly magnified visual 'picture' of his own cerebral nerve currents on a projection screen. (This piece of science fiction is conceived in analogy to the fluoroscope with the help of which a person may watch, e.g., his own heart action.) Along the lines of the proposed realistic interpretation he would take the shifting patterns visible on the screen as evidence for his own brain processes. Assuming the empirical core of parallelism or isomorphism, he would find that a 'crescendo' in his anger—or in the melody he heard—would correspond to a 'crescendo' in the "correlated" cortical processes. (Similarly for 'accelerandos', 'ri-tardandos', etc. Adrian's and McCulloch's experiments seem to have demonstrated a surprisingly simple isomorphism of the shapes of geometrical figures in the visual field with the patterns of raised electric potentials in the occipital lobe of the cortex.) According to the identity thesis the directly experienced qualia and configurations are the realities-in-themselves that are denoted by the neurophysiological descriptions. This identification of the denotata is therefore
empirical, and the most direct evidence conceivably attainable would be that of the autocerebroscopically observable regularities."
(Feigl, Herbert.
The 'Mental' and the 'Physical': The Essay and a Postscript. Minneapolis, MN: University of Minnesota Press, 1967. pp. 89-90)
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Sy Borg wrote: ↑July 11th, 2021, 10:04 pmRe #2: When it comes to the first ever sensation felt by biology, the idea of wakefulness and sleep is moot. It would perhaps be a very, very weak sensation, or perhaps completely overpowering, being unregulated.
The wake/sleep cycle isn't an exclusively human phenomenon:
Sleep in non-human animals:
https://en.wikipedia.org/wiki/Sleep_in_ ... an_animals
Circadian rhythm:
https://en.wikipedia.org/wiki/Circadian_rhythm
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"Circadian rhythms are found in nearly every living thing on earth. They help organisms time their daily and seasonal activities so that they are synchronized to the external world and the predictable changes in the environment. These biological clocks provide a cross-cutting theme in biology and they are incredibly important. They influence everything, from the way growing sunflowers track the sun from east to west, to the migration timing of monarch butterflies, to the morning peaks in cardiac arrest in humans.
Despite the diversity of life on our planet, there are many similarities in the way in which circadian rhythms are generated and synchronized to the solar cycle. There is a molecular feedback loop—the transcription–translation feedback loop (TTFL)—that underpins all these processes, and our understanding of this molecular clockwork provide the best example to date of how genes and their protein products interact to generate complex behaviour.
Circadian rhythms are found in bacteria, algae, fungi, plants, and animals, but we have had to concentrate our discussion on mammals. Although rats and mice are familiar, the terminology used to describe the circadian rhythms in these species may be alien to readers, and it is this terminology that makes some of the diagrams seem daunting, but the concepts are, we hope, much easier to follow."
"The regular cycle of sleep and wakefulness is perhaps the most obvious 24-hour pattern of behaviour.
…
Almost all life shows a 24-hour pattern of activity and rest, as we live on a planet that revolves once every 24 hours causing profound changes in light, temperature, and food availability."
(Foster, Russell G., and Leon Kreitzman.
Circadian Rhythms: A Very Short Introduction. Oxford: Oxford University Press, 2017.)
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Sy Borg wrote: ↑July 11th, 2021, 10:04 pmRe #4: Once you have a mind that is aware of itself, you are surely a very long way from the first ever moment of consciousness. That is an example of the trouble that humans have in accepting that consciousness can be anything other than a variant on humanlike consciousness.
It remains to be seen if the global workspace theory gets to the bottom of consciousness, or just the bottom of p-consciousness at a level that humans consider worthwhile.
The point is that there are good scientific reasons to doubt that the (phenomenally) conscious mind is independent of the cognitive mind. The idea of "pure", "virginal" experience which doesn't depend for its occurrence on being accessed, apprehended, detected, or discerned by any cognitive function seems to be a metaphysical myth. Even the most primitive experience seems to require a pretty complex cognitive architecture.
"Cognitive function is a broad term that refers to mental processes involved in the acquisition of knowledge, manipulation of information, and reasoning. Cognitive functions include the domains of perception, memory, learning, attention, decision making, and language abilities."
Source:
https://link.springer.com/referencework ... 0753-5_426
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"My opinion is that Chalmers swapped the labels: it is the 'easy' problem that is hard, while the hard problem just seems hard because it engages ill-defined intuitions. Once our intuition is educated by cognitive neuroscience and computer simulations, Chalmers’s hard problem will evaporate. The hypothetical concept of qualia, pure mental experience detached from any information-processing role, will be viewed as a peculiar idea of the prescientific era, much like vitalism—the misguided nineteenth-century thought that, however much detail we gather about the chemical mechanisms of living organisms, we will never account for the unique qualities of life. Modern molecular biology shattered this belief, by showing how the molecular machinery inside our cells forms a self-reproducing automaton. Likewise, the science of consciousness will keep eating away at the hard problem until it vanishes."
(Dehaene, Stanislas.
Consciousness and the Brain: Deciphering How the Brain Codes Our Thoughts. New York: Viking/Penguin, 2014. p. 262)
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However, I disagree with Dehaene when he says that "consciousness reduces to what the workspace does: it makes relevant information globally accessible and flexibly broadcasts it to a variety of brain systems." (p. 168)
For if access consciousness or cognitive access is
necessary for phenomenal consciousness, it alone may not be
sufficient for it; and if it isn't, there is an extra explanandum: What makes the neural information in the global workspace = working memory
experiential/phenomenal information? – Answering this question merely by referring to the functional aspect of global accessibility/availability is unsatisfying, because it seems conceivable that the information content of working memory has this functional feature and yet lacks the experiential feature, without which there is no phenomenal consciousness.
So even if the experiential content of phenomenal consciousness is identical with the globally accessible/available information content of working memory, and its accessibility/availability to various neurocognitive modules in the brain is a necessary condition of phenomenal consciousness, it doesn't seem sufficient. Phenomenal consciousness may depend on access consciousness, but it isn't reducible to it, because there is an important distinction between
objective neural information and
subjective neural information in the form of experience.
A mental/neural state is access-conscious iff its information content is accessible or available to (most or many) cognitive modules or processors in the brain (such as the one responsible for the human capacity for introspective reports).
However, the term "access consciousness" (which was coined by Ned Block) may be regarded as a misnomer, because an access-conscious state
as such is nothing more than a state
with an externally accessible informational content; and if such an access-conscious state isn't also a phenomenally conscious state
with an experiential content, what's still
conscious about it? Mere access consciousness can be built into AI robots which are phenomenally nonconscious zombie agents.
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"[T]his redefinition of information access as “access consciousness” risks
inflating a brain function to a conscious status that it does not possess. Information access and information availability have been widely recognised aspects of human information processing since the advent of cognitive psychology in the 1960’s, and it is true that information which enters phenomenal consciousness can be accessed, rehearsed, entered into long-term memory, used for the guidance of action and so on. However, the processes that actually enable information access, rehearsal, transfer to long-term memory and guidance of action are not themselves conscious (if they were there would be no need to subject such processes to detailed investigation within cognitive psychological research—see Velmans, 1991a). In short, “access consciousness” is not actually a form of consciousness. The conscious part of “access consciousness” is just phenomenal consciousness, and the processes that enable access to items in phenomenal consciousness are not conscious at all."
(Velmans, Max. "How to Define Consciousness – And How Not to Define Consciousness." 2009. Reprinted in
Towards a Deeper Understanding of Consciousness: Selected Works of Max Velmans, 23-36. Abingdon: Routledge, 2017. p. 28)
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"Functionalists in particular try to reduce consciousness to some input-output function or causal role in the control of behaviour. Along the functionalist lines of thought, consciousness has been defined as 'access consciousness'. Access refers to the output function of conscious information: Consciousness is the type of information that accesses many other cognitive systems – motor systems – and thereby also is able to guide or control external behaviour, especially verbal reports about the contents of (reflective) consciousness. According to the functionalist definition, then, conscious information is only the information in the brain that fulfils the access function. 'Access' refers to global informational access, especially the access to output systems within the human cognitive system.
If consciousness is identified with the global access function of information, the ability to report the contents of consciousness verbally or to respond externally to stimuli is at least implied as necessary for consciousness, because 'access' generally means access to output systems. Furthermore, the access definition of consciousness reduces consciousness to a certain type of information processing (or input-output function) and hence suffers from all the same problems as functionalism does as a theory of consciousness. It leaves out qualia, and it rejects the possibility that there could be pure phenomenal consciousness that is independent of selective attention, reflective consciousness, verbal report or control of output mechanisms."
(Revonsuo, Antti.
Consciousness: The Science of Subjectivity. New York: Psychology Press, 2010. p. 95)
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