The hard problem of consciousness begins with a powerful intuition.
We can describe what happens when an organism sees, hears, remembers, decides, attends, reports and responds. We can describe neural activity, information processing, behavioural dispositions and functional organisation.
But, the argument goes, none of this tells us what the experience is like.
Why, then, should there be anything it is like to see red?
Why should pain hurt?
Why should a sound be heard rather than merely processed?
Why should there be a subjective point of view at all?
These questions are often taken to reveal a fundamental explanatory gap between the physical world and conscious experience.
There is certainly something important here.
But perhaps we have been asking the question in the wrong place.
In the previous two posts, we examined the concept of the quale—the supposedly distinctive phenomenal ingredient of an experience. We saw that there is an important difference between saying that an experience has a particular character and saying that this character is itself a distinct ontological ingredient.
That distinction changes the hard problem.
Not necessarily by making it disappear.
But by making us ask what, exactly, is left of it.
The problem as usually stated
The hard problem is often presented by contrasting two kinds of explanation.
We can explain what a system does.
We can explain how sensory information is processed, how neural pathways interact, how attention is directed, how information is integrated, how behaviour is generated, how memories influence subsequent behaviour, and how an organism reports its internal states.
But none of this, it is argued, explains why there should be experience.
Why should any of this processing be accompanied by a feeling?
Why should there be something it is like to be the organism undergoing the processing?
The intuition is difficult to dismiss because we can imagine describing an enormously complicated physical system in complete detail and then asking:
Yes, but where is the experience?
That question seems to reveal something missing.
But notice what we have done.
We have imagined the complete physical description.
Then we have imagined adding one more thing:
Experience.
The question is whether that second item has been independently identified.
If what we call experience is simply the organism's being in a certain kind of organised, world-involving state, then the thought experiment may not reveal an omitted ingredient.
It may reveal an omitted description.
The explanatory gap
This is not to deny the explanatory gap.
There is plainly a difference between knowing that a person is in pain and actually being that person in pain.
A scientific description of neural activity is not itself an occurrence of pain.
A description of a sunset is not a sunset.
A description of a musical performance is not the performance.
But these observations do not necessarily establish that experience contains a special ingredient inaccessible to physical explanation.
They establish something more ordinary and perhaps more profound:
A description of an event is not the event described.
This seems almost embarrassingly obvious outside consciousness.
We do not expect a description of a hurricane to blow our house down.
We do not expect a description of a violin performance to produce sound.
And we do not expect a description of digestion to digest a meal.
The fact that a description and the thing described are different does not constitute an ontological gap between them.
Yet something like this distinction can become obscured when the thing being described is subjective experience.
We move from:
A neural description is not an experience.
to:
Therefore the experience must contain something that the neural description cannot possibly describe.
That inference does not follow.
The first-person fact
There is nevertheless something that the comparison with hurricanes and violins misses.
Experience is not merely something that happens.
It is something that happens for an organism.
When I see a tree, the tree is not merely being processed by my nervous system. The tree appears within my experience.
When I am in pain, the injury is not merely generating neural activity. Something is wrong for me.
This first-person character is genuine.
But perhaps we have been trying to explain it by looking for an additional object inside the organism.
That may be the wrong direction.
A first-person perspective might instead be a consequence of the organisation of the organism itself.
An organism maintains itself.
It distinguishes what belongs to itself from what does not.
It responds selectively to its surroundings.
It remembers previous states.
It anticipates possible future states.
It regulates its activity according to what is beneficial or harmful.
It occupies a particular location and trajectory in the world.
From such an organisation, a world can become significant for the organism.
The question then becomes:
What kind of organisation allows a world to matter to an organism?
That is a difficult question.
But it is not obviously a question about an additional phenomenal substance.
The disappearance of the extra step
Consider pain again.
We might describe the situation like this:
tissue damage → nociception → neural processing → pain → painful feeling.
But the last two terms are suspiciously close.
If pain is already the organism's experienced condition, then what is the additional painful feeling?
We could instead write:
tissue damage → organismic processing and response → pain experienced by the organism.
The latter does not solve the scientific problem. We still need to understand how such states arise, how they are organised, how they interact with attention, memory and action, and why different organisms experience their environments differently.
But we have removed a potentially misleading duplication.
The physical process does not have to produce:
a process + a private phenomenal object.
It may produce—or instantiate—a particular mode of being an organism.
The experience is not something added to the organism's state.
It is the organism's state considered as experienced.
That may sound like a verbal manoeuvre.
But it is no more a verbal manoeuvre than distinguishing the temperature of a gas from the gas itself. The distinction is real, while the two are not two independent substances.
What happened to the “what-it-is-like”?
This is where our earlier examination of the phrase what it is like becomes important.
There is something it is like for me to experience pain.
There is something it is like for me to see red.
There is something it is like for me to hear music.
But perhaps what it is like does not name an additional ingredient in each case.
It tells us something about the mode of existence of the experience.
And this matters because the hard problem often seems to acquire its force from treating the phrase as though it named an unexplained product:
Neural processing produces behaviour.
Neural processing produces reports.
Neural processing produces discrimination.
But somehow it also produces what it is like.
The final item then appears almost miraculous.
But if what it is like is not a further product, the structure changes.
The organism does not first undergo a physical process and then receive a phenomenal accompaniment.
The organism undergoes the process as an experience.
We still have to explain how such an organisation comes about.
But we no longer have to explain the production of an extra object whose existence was inferred from the way we describe the experience.
This does not make consciousness easy
There is a danger here.
Once the apparent ontological surplus has been removed, we might be tempted to say:
Problem solved. Consciousness is just brain activity.
That would be premature.
“Just” is doing far too much work.
There remain extraordinarily difficult questions.
Why do some physical systems have the kind of organisation associated with conscious experience?
What distinguishes conscious from unconscious processing?
How do different sensory modalities become integrated?
How does an organism acquire a stable perspective on its environment?
How does memory become involved in present experience?
How does anticipation shape perception?
How does bodily regulation become connected with attention, emotion and action?
How do linguistic and conceptual capacities transform experience?
These are not trivial questions.
Nor does calling them “neural processing” answer them.
But they are questions about how a particular kind of organised system works.
They need not be questions about how matter produces a second, non-material realm.
That is a significant difference.
The explanatory gap may change its character
Perhaps, then, the hard problem is not eliminated but transformed.
Instead of:
Why does physical processing produce phenomenal experience?
we ask:
Why does a particular kind of organised physical system have a first-person mode of existence?
Instead of:
Why is there something it is like?
we ask:
How does a world come to matter to an organism from its own situated perspective?
And instead of:
Where is the quale?
we ask:
What kind of organisation constitutes an experienced world?
These questions are still difficult.
But notice what has happened.
The mystery has moved from an unexplained thing to an unexplained relation and organisation.
That may be a much more promising place for an explanation to begin.
The zombie problem
This also changes the significance of the philosophical zombie.
The familiar zombie is imagined as a being physically identical to a conscious human but with no experience whatsoever.
It behaves exactly as we do.
It talks about pain.
It reports seeing red.
It discusses consciousness.
But, supposedly, there is nobody home.
The thought experiment is intended to show that physical facts cannot exhaust phenomenal facts.
But the force of the thought experiment depends upon being able to specify what has been removed.
If what has been removed is a quale—an additional phenomenal ingredient—then we need to establish that the quale was an independent ingredient in the first place.
If experience instead belongs to the organisation of the organism, then the question becomes more difficult:
What does it mean for a physically identical organism to have exactly the same organisation, capacities, dispositions and relations, while lacking the mode of existence that those relations constitute?
Perhaps such a creature can be coherently imagined.
Perhaps it cannot.
But the zombie thought experiment no longer provides an automatic demonstration that consciousness is something over and above physical organisation.
It merely restates the intuition that experience seems conceptually separable from its physical description.
And that intuition is precisely what we need to investigate rather than simply accept.
From things to relations
There is a broader philosophical possibility here.
Perhaps consciousness has proved resistant to explanation because we have repeatedly looked for the wrong kind of thing.
We ask:
What is consciousness made of?
Where is the phenomenal ingredient?
What physical process produces the quale?
But perhaps consciousness is not best understood as a thing at all.
It may be a relation.
Not a relation between two already existing objects, but a relation in which an organism and its environment acquire significance for one another.
The organism is not merely somewhere in the world.
It has a world.
Things can help or harm it.
They can attract or repel it.
They can be familiar or novel.
They can be remembered, anticipated, feared, sought, ignored or enjoyed.
A world organised in this way is not merely a collection of physical objects.
It is a world for something.
That “for” may be closer to the heart of consciousness than the elusive quale.
From meaning to mattering
This also suggests a distinction that has appeared elsewhere in our exploration of living systems.
Before something can mean something to an organism, it must in some sense matter to it.
A harmful stimulus matters.
A source of nourishment matters.
A potential mate matters.
A predator matters.
A familiar environment matters.
A change in temperature matters.
A signal from another organism can matter.
None of this yet requires symbolic meaning.
But it does require a relation between the state of the organism and the possibilities afforded by its environment.
Perhaps consciousness emerges not when matter somehow acquires a private interior glow, but when an organism's relation to its world becomes sufficiently organised that the world is encountered in terms of what matters to it.
If so, phenomenal experience would not be an inexplicable decoration added to biological activity.
It would belong to a history in which matter becomes increasingly capable of being affected by a world that matters.
That is a very different story.
So what remains of the hard problem?
Quite a lot.
But perhaps not quite what we thought.
We still need to understand why some forms of organisation generate the kinds of experience we recognise as conscious.
We still need to explain the remarkable unity, richness and flexibility of human experience.
We still need to understand why consciousness varies across organisms and across different states of an individual organism.
And we still need to explain how first-person organisation arises within the history of life.
None of those questions should be trivialised.
But one question may have lost some of its force:
Why does physical processing produce an additional phenomenal thing called what it is like?
If what it is like is not an additional thing, then there is nothing there for physical processing to produce.
The challenge becomes more interesting, not less.
We have to explain experience itself rather than explaining the production of a mysterious object that we inferred from our description of experience.
Perhaps this is why the hard problem has seemed so stubborn.
We have been looking for a bridge between two things:
physical processes
and
phenomenal qualia.
But perhaps the bridge was never the real problem.
Perhaps the real question is how, within the organisation of living matter, a world comes to exist as a world for an organism.
And that takes us back to the question with which this series began.
What does it mean for something to be felt?
Perhaps the answer is not that a physical event produces a private phenomenal object.
Perhaps it is that an organism is organised in such a way that what happens to it happens as something.
That is still mysterious.
But it is a mystery located in the organisation of life, rather than in an unexplained substance called experience.
And perhaps that is a mystery we can actually begin to investigate.