Consul wrote: ↑June 6th, 2021, 1:09 pmThat is not the case, Consul. We know about organelles in the same way as we know about eukaryotic organs. We know what they are and what they do to some extent, but the synergies of life are extremely complex, with numerous unknowns remaining.Sy Borg wrote: ↑June 6th, 2021, 2:02 amNo, since if "the anatomies of (C)NS-less organisms are well known"—which is true!—, there are no hidden, hitherto undiscovered organs or systems "that fulfil the same functions as brains."Consul wrote: ↑June 5th, 2021, 11:40 pm I don't think so, because the anatomies of (C)NS-less organisms are well known; so if there were such functionally equivalent non-neuronal structures, the scientists would have found them already.That is only an assumption, and not of the kind that tends to play out well in history.
Consul wrote: ↑June 6th, 2021, 1:09 pmIt's an equivalent mistake, where a capacity was believed to be missing due to assumptions made about necessary structures.Sy Borg wrote: ↑June 6th, 2021, 2:02 amBeing wrong about the capacities of nonhuman minds doesn't mean being wrong about the necessity for brains.Consul wrote: ↑June 5th, 2021, 11:40 pmWhatever kind of (conscious) mind they have, birds do have brains. Nonhuman animals needn't have a humanlike brain in order to have a (conscious) mind, but they must have some kind of brain or other. For example, octopus brains are very different from human brains, but they are brains all the same.Nonetheless, the assumption was made that they lacked higher mental functions due to their lack of a cortex. They knew about the pallium, but not about some of its functions in bird brains.
Consul wrote: ↑June 6th, 2021, 1:09 pmDuh yes, sixth graders know that octopuses have a brain and CNS. Nonetheless, if we did not know of octopuses' brain configurations we would have assumed it not possible.Sy Borg wrote: ↑June 6th, 2021, 2:02 amBy the same token, other equivalences may be found in other organisms. The octopus's non-centralised brains alert us to the fact that configurations of consciousness-shaping organs can be unexpectedly different.An octopus does have a central(ized) nervous system!
Brains come in various sizes and shapes, but there are no brainlike nonbrains in organisms that are functionally and informationally equivalent to brains.
Consul wrote: ↑June 6th, 2021, 1:09 pmAnd it's always assumed to be "dark" unless light is proven. Not that any researchers are trying to prove it, or could ever attract funding. Ultimately, it's not profitable to find out whether very simple organisms experience their lives or not. No one (with influence) cares.Sy Borg wrote: ↑June 6th, 2021, 2:02 amNo, there isn't! There's just plenty of unjustified conclusions. For if complex and flexible forms of behavior are brain-independent, it by no means follows that phenomenal consciousness is brain-independent too.Consul wrote: ↑June 5th, 2021, 11:40 pmIt is not the case that in the realm of speculation all hypotheses are equally (im)plausible or (im)probable. The hypothesis that nervous systems and especially central ones are necessary for conscious minds appears highly plausible and probable in the light of our scientific knowledge of nature, and there is no convincing evidence for its negation!Yes, there's plenty of convincing circumstances for its negation - unexpected complexity and flexibility in the behaviours of non-brained organisms. It's not evidence, but it's real and often dismissed without investigation based on brain-based dogmas.
"Most researchers accept that even quite complex perception, cognition, and control of action can go on entirely 'in the dark'."
Yet, there are numerous complex and flexible behaviours engaged in by microbes, and researchers are yet to understand how they do it.
Consul wrote: ↑June 6th, 2021, 1:09 pmDuh yeah, as many schoolchildren know.Sy Borg wrote: ↑June 6th, 2021, 2:02 am(By the way, being animals, tardigrades don't belong to the unicellular protozoa but to the multicellular metazoa.)Consul wrote: ↑June 5th, 2021, 9:30 amThere are levels of (intransitive and transitive) consciousness in the sense of levels of awakeness or alertness, or of awareness (perception, cognition) of oneself or one's environment, and there are levels of intelligence; but what is a "level of sentience"?To experience the same kind consciousness as a tardigrade - to know what it feels like to be a tardigrade. My argument is that, to us, feeling like a tardigrade would feel like nothing, like deep sleep, but such feelings would be significant to tardigrades.
I chose tardigrades because their brains only have a few hundred neurons. From memory, tunicate larvae have about 120 neurons, which are absorbed back into the growing animal once it latches onto something and commences a sessile lifestyle. Previously, you assessed that the larvae are probably not conscious at all. So tardigrades sit at the edge and I wanted to see your reaction.
Consul wrote: ↑June 6th, 2021, 1:09 pmIs there anything it feels like to be a tardigrade? Anyway, if there is, they surely don't know what it feels like to be a tardigrade in the sense of having introspective knowledge of it. If you have a feeling without being cognitively aware of it, in what sense is it significant to you? For instance, when I am in pain but don't know I am, it means nothing to me.Why on Earth would anyone assume that a tardigrade would have introspective knowledge? You keep on proving my claim that people find it impossible to "lower their standards" and imagine truly basic forms of consciousness. We always have a voice in our heads, yammering on in our native tongue.
Tardigrades have no language. No voice in their heads. They aren't interested in knowing anything. But they would pulse. They would tingle. They would feel warm and cold (albeit with famous levels of insensitivity). They would perhaps experience little chemical reflex reflexes. And who knows else.
Consul wrote: ↑June 6th, 2021, 1:09 pmNo, I am not saying that microbes have higher order consciousness. They don't read Goethe or Dawkins. They don't learn musical instruments, reason or wonder. They don't play Yahztee. Nor do they form tribes that coordinate hunts. They don't form family bonds. They don't care for their young. Heck, in a way, asexual microbes ARE their young!Sy Borg wrote: ↑June 6th, 2021, 2:02 amI am saying that humans would be unable to perceive the simplest consciousnesses. They are too trivial as compared with our deeply complex psyches. We humans have long been dismissive of other organisms' capacity to feel and, while much improvement in this area his happened in the last century, it appears to me that we just lowered the bar, while remaining gatekeepers - of anthropocentric conceptions of what it feels like to be alive. It's hard not to be anthropocentric because it's all we have. There are still many researchers who believe that insects have no phenomenal consciousness - that being an insect does not feel like anything.I am saying that natural consciousness is an exclusively zoological phenomenon, and there is certainly nothing anthropocentric about my saying so. I do not believe that all animals are phenomenally conscious, but I strongly tend to believe that all brained animals are, or at least those among them with non-primitive brains. (I know that "non-primitive" is an imprecise adjective.) It is uncertain whether insects are phenomenally conscious, but it isn't unlikely that they are—unless the higher-order theory of phenomenal consciousness is true, in which case the number of phenomenally conscious animal species is reduced drastically.
I am aware that you have a more nuanced view on this, and draw the line somewhere around brained nematodes. I am not convinced that we have solved as much of this puzzle as you are.
"Most generally, then, higher-order theories of phenomenal consciousness claim the following:
Higher Order Theory (In General): A phenomenally conscious mental state is a mental state (of a certain sort—see below) that either is, or is disposed to be, the object of a higher-order representation of a certain sort."
Source: https://plato.stanford.edu/entries/cons ... ss-higher/
Such higher-order representations require a highly developed cognitive apparatus enabling an inner awareness of one's conscious states, which most brained animals lack.
So why are you talking about "higher order theories of phenomenal consciousness? This is anthropomorphism, with animals acting as ersatz humans. That is, animals are more humanlike.
Again, think of pulses and tingles, not the cleverness of animals.
Consul wrote: ↑June 6th, 2021, 1:09 pmIt's an analogy that, I believe, stems from human predatory instincts. It is normal for predators to objectify their prey. That's how they can kill without hesitation. Humans do this too with any organism that they routinely kill (including, often, even enemy combatants). Their innerness is denied. It always seems absurd to imagine innerness in that which is assumed to be a "biological machine".Sy Borg wrote: ↑June 6th, 2021, 2:02 amWhen I conduct the thought experiment I think of blind pulses within, like breaths or heartbeats, and tingling on the outside where the environment is sensed. There is no emotion, no care. Just sensations, attraction and repulsion, excitation and slowing. We call such things "biological machines" but that's just an analogy because they are obviously not machines - they are simple living, sensing beings.One meaning of "machine" is "a combination of parts moving mechanically, as contrasted with a being having life, consciousness and will" (Oxford Dictionary of English). Given this meaning, living organisms aren't machines. But in the broadest sense a machine is a mechanism or dynamic system of any kind; so given this meaning, living organisms are machines too.
Not so long ago, scientists questioned whether DOGS were actually conscious of if they were "biological machines". The notion, of course, is completely bonkers. In its odd "blindness", this example makes clear just how strong the tendency towards objectification can be. Neuroscience has since somewhat come to the aid of organisms that - like humans - have brains. But again, we focus on that which is like us.