Levine’s point is that even if we possessed a complete and correct physical account of the brain—covering all neural mechanisms, causal roles, and functional organization—it would still be unclear why those physical facts give rise to particular qualitative experiences. The gap appears when we move from physical or functional descriptions to phenomenal character: nothing in the physical story seems to explain why pain feels the way it does, — Wayfarer
Levine opens
Chapter Four, The Explanatory Gap, in
Consciousness with this -
“We want to know not only that such-and-such is the case, but also why it is the case. If nature is one large, lawful, orderly system, as the materialist (or the naturalist) insists, then it should be possible to explain the occurrence of any part of that system in terms of basic principles that govern nature as a whole.”
Well, give it time. There are plenty of scientists and philosophers who believe that science is on track to one day discover how perception associating with memories and feelings give rise to qualia.
And there are those who believe
qualia is not a problem that materialism needs to address.
I’d also like to mention that it is not an objective of neurobiology to ask “why?” but to ask “how?” – and by the end of that chapter, Levine changes his scope –
I think the explanation of gappiness is a very deep problem, and … the problem of explaining how the physical gives rise to the phenomenal and the problem of explaining the peculiar features of phenomenal concepts are intimately connected…
We’ve already mentioned the understanding of the word “problem” in science as a direction for further research, and perhaps this is how Levine means it here, too.
Anyway, there is a biological explanation for why pain feels the way it does – our brains evolved a system of specialized nerve endings that detect harmful stimuli and then send electrical signals via the nervous system to the brain (thalamus, cortex) where the signals are interpreted as pain, and then we respond to those signals.
It wouldn’t have worked if detecting harmful stimuli felt good! No evolutionary advantage in that.
An understanding of why we are the way we are must involve our evolutionary history.
I am left with this question - If not the brain producing consciousness, and qualia, then what?
All evidence points to it being the brain, and that is the direction in which future research should go.
he argues that current forms of physical explanation leave an unresolved conceptual gap between objective accounts and subjective experience, a gap that cannot be closed simply by adding more neuroscientific detail.' — Wayfarer
Well, many would disagree with him, and some would say it does not matter.
Anyway, yes, we might say that there is only one person inside any one head, but we have our ways of communicating our existence – how it impacts on us - in a multitude of ways. Both science and philosophy rely on it.
What does a smile tell you about the person smiling? We are even able to discriminate between different kinds of smiles. Do you have to have epistemic knowledge about what the smiler is feeling – experience the specific activity of their amygdala - in order to understand the message of the smile? That would be like saying I cannot study the gravity on the moon unless I feel it.
Perception of emotional expressions (fundamental to social development) has been the focus of much research in infants –
Facial and vocal expressions of emotion convey communicative intent, provide a basis for fostering shared experience, are central to the development of emotion regulation, and guide infant exploratory behavior (Gross, 1998; Saarni, Campos, Camras, & Witherington, 2006; Walker-Andrews, 1997). Within the first half year of life, infants are sensitive to emotional information in facial and vocal expressions, (Field, Woodson, Greenberg, & Cohen, 1982; Flom & Bahrick, 2007; Walker-Andrews, 1997), and in the prosodic contours of speech (Fernald, 1985, 1989; Papousek, Bornstein, Nuzzo, Papousek, & Symmes, 1990). Much research has focused on infant discrimination of adult emotional expressions (see Walker-Andrews, 1997; Witherington, Campos, Harriger, Bryan, Margett, 2010 for reviews), particularly for static faces. By 4 months of age infants can discriminate among static faces depicting happy, sad, and fearful expressions (Barrera & Mauer, 1981; Field, Woodson, Greenberg & Cohen, 1982; Field, Woodson, Cohen, Greenberg, Garcia, & Collins, 1983; La Barbera, Izard, Vietze, & Parisi, 1976). For example, La Barbera and colleagues (1976) found that 4- to 6-month-olds discriminated pictures of joyful, angry, and neutral facial expressions and preferred to look at joyful expressions. Between 5 and 7 months of age, infants discriminate between a wider range of static facial expressions including happiness, fear, anger, surprise, and sadness, and can generalize across expressions of varying intensity and across different examples of an expression performed by either the same or different individuals (Bornstein & Arterberry, 2003; Caron, Caron, & MacLean, 1988; Ludman & Nelson, 1988; Nelson & Dolgin, 1985; Nelson, Morse, & Leavitt, 1979; Serrano, Iglesias, & Loeches, 1992).
https://pmc.ncbi.nlm.nih.gov/articles/PMC3843965/
Shall this research be disregarded because the researcher did not feel what the baby was feeling?
As for the “how do we measure?” question – here’s an example – in a study entitled
Infants' facial electromyographic responses to the sight of emotional interpersonal touch – which investigated infants' sensitivity to the emotional valence of observed touches -
To investigate this issue, we measured facial electromyographic (EMG) activity in response to positive (caress) and negative (scratches) observed touches in a sample of 11-month-old infants. Facial EMG activity was measured over the zygomaticus major (ZM) and corrugator supercilii muscles, respectively involved in positive (i.e., smiling) and negative (i.e., frowning) facial expressions. Results have shown distinct activations of the ZM during the observation of scratches and caresses. In particular, significantly greater activation of the ZM (smiling muscle) emerged specifically in response to the observation of caresses compared to scratches. Our finding suggests that, in infancy, observed affective touches can evoke emotional facial reactions.
https://pubmed.ncbi.nlm.nih.gov/38873865/
Here’s an interesting perspective from Hannah Arendt – explored in a section of
The Life of the Mind – that the interplay of “being” and “appearing” frames our very existence, that we are no less object than subject. She writes:
Nothing could appear, the word “appearance” would make no sense, if recipients of appearances did not exist — living creatures able to acknowledge, recognize, and react to — in flight or desire, approval or disapproval, blame or praise — what is not merely there but appears to them and is meant for their perception. In this world which we enter, appearing from a nowhere, and from which we disappear into a nowhere, Being and Appearing coincide… Nothing and nobody exist in this world whose very being does not presuppose a spectator. In other words, nothing that is, insofar as it appears, exists in the singular; everything that is is meant to be perceived by somebody… Plurality is the law of the earth.
Since sentient beings — [humans] and animals, to whom things appear and who as recipients guarantee their reality — are themselves also appearances, meant and able both to see and be seen, hear and be heard, touch and be touched, they are never mere subjects and can never be understood as such; they are no less “objective” than stone and bridge. The worldliness of living things means that there is no subject that is not also an object and appears as such to somebody else, who guarantees its “objective” reality. What we usually call “consciousness,” the fact that I am aware of myself and therefore in a sense can appear to myself, would never suffice to guarantee reality… Seen from the perspective of the world, every creature born into it arrives well equipped to deal with a world in which Being and Appearing coincide; they are fit for worldly existence.
This calls to mind something I posted previously, that consciousness is intimately interconnected to the environment -
Information in > consciousness happens > information out
This represents a part of the causal cycle involved in the formation of consciousness – part of a continual loop of lived experience –
… world > body + brain > world > body + brain > world > body + brain …. and so on….
How does this happen? Short answer: By the electrochemical functioning of neurons.
I want to end this post by saying thank you for giving me so much to think about.