This is the second part of a three-essay sequence. The first part, The Encoding Problem, made the case that the phone runs the user below the threshold of memory consolidation, that this is true at scale, and that the cost is the substitution of mood for content, residue for memory, sensation for experience. The argument was personal in its examples and biological in its mechanism. Each essay in the sequence stands on its own, and you do not need to have read the first to follow this one. What this part adds is the question I could not honestly leave alone after the first: what kind of force is shaping the substrate when an input pattern of this kind is applied for two decades, and why the science that should be naming the force does not yet exist.
I want to start where the first essay left off, with the threshold argument, and ask what kind of work it is doing at the level beneath the personal one. If the medium runs the user below the threshold of memory consolidation, then over years the substrate that was being run below threshold becomes, in a measurable sense, a different substrate. That is the level the question now wants to reach. But before I go further, I want to argue against myself, because I do not trust an argument I have not tried to break.
V. Red teaming the hypothesis
The first counter is that humans have always faced information overload and have always coped. The printing press was supposed to ruin attention. So was the newspaper. So was radio. So was television. Each new medium has been accused, by its sceptics, of destroying the cognitive capacities of the people exposed to it, and each time the accusation has turned out to be at least partly wrong. The species adapts. The brain finds a way. Perhaps the phone is just the latest iteration, and in twenty years we will look back at the present panic the way we now look back at the panic about novels rotting the minds of young women in the eighteenth century.
The counter has weight. It also has limits. Each prior medium delivered material at a rate the brain could in principle process. The newspaper might be long, but it sat still. The television might be loud, but a programme lasted thirty or sixty minutes and built a thing the viewer could follow. The phone is the first medium in human history engineered, at the granular level, to operate below the threshold of memory consolidation. That is a difference in kind, not a difference in degree. The earlier media may have strained attention. The phone harvests it without producing memory. The two are not the same problem.
The second counter is that the phone, used differently, can produce memory just fine. A long-form podcast on a walk, an article read slowly, a video lecture watched without interruption. These are phone uses that cross the threshold, that integrate, that produce a self that is afterwards different. This is true. It is also rare. It is rare because the phone’s defaults run against it. The notification arrives, the thumb twitches, the long form is interrupted, and the interruption is itself a sub-threshold experience. The exception proves the rule. The rule is the default behaviour, and the default behaviour is what shapes the user.
The third counter, and the one I take most seriously, is that the older life was never as good as we remember it. The pre-phone adult walking past the rose was also not, in most cases, looking at the rose. They were thinking about the office, the bills, the marriage, the next thing. The four-year-old’s encounter with the rose is the privilege of having no internal life yet to compete with the rose. By that standard, the phone is not the cause of distraction. It is the latest target of a distraction that was already there. The contemplative life was always a minority practice. We are blaming the phone for closing a door that was never open to most people in the first place.
This counter is fair, and it deserves a careful answer. The honest answer is that the phone has not invented distraction, but it has industrialised it. The distracted adult walking past the rose at least had moments, walking home, lying in bed, waiting for a bus, when the distraction lifted and something else could happen. Those moments were the small reservoirs of integration, even for the inattentive. The phone fills the reservoirs. There is no gap left. The pre-phone life had distraction as a feature; the phone life has distraction as the entire fabric. The difference is that one was punctuated and the other is continuous, and continuity, as anyone who has tried to learn a difficult thing knows, is the variable that determines whether anything is learned at all.
VI. What will we recall?
This is the question that should keep us up at night. In the future, what will we recall? What fragments will emerge from our memories to define our world?
My grandfather, born in 1890, could recall the smell of the kitchen in the house he grew up in. He could recall the particular way his mother turned a corner. He could recall, in his nineties, the texture of a wooden gate he had not touched in eight decades. The recall was not perfect. It was, by all accounts, vivid in pieces and fogged in others. But the pieces were specific. They had survived because they had been encoded with full attention, in conditions where attention was not yet a contested resource.
What will the equivalent be for a person now in their twenties, looking back from their nineties in the 2090s? The honest answer, if the hypothesis I have been testing is even partly correct, is that the equivalent will not exist. There will be no kitchen smell with that fidelity. There will be no wooden gate. There will be a great deal of cached imagery from feeds, half-remembered without source, blending together in the way that cached imagery does. There will be the residue, the feeling of having been on the phone, the mood without the cause. The person in their nineties will know that something happened in those decades. They will struggle to say what.
This is the prospect that the hypothesis, taken seriously, points towards. Not a generation of people who remember less of their lives. A generation of people whose lives, in the durable sense, were less lived. The unmade memory is the unmade self, because the self is, in the only definition that matters, the accumulation of memories that have been integrated into a continuous person. Strip the encoding, and what is left is not a thinner version of the person who would have existed otherwise. It is something different in kind. Someone whose interior, in the parts that should have been built out of remembered experience, is filled instead with the residue of feeds.
I am not certain of this. I want to be clear about my uncertainty. The brain is more resilient than its critics typically allow, and the people growing up inside this medium are, in many cases, finding their way to forms of attention I do not yet recognise. It is possible that what looks like cognitive degradation from outside is, from inside, the early stage of a different cognitive style that will turn out to have its own digitally adapted integration system. In a world increasingly populated by AIs, that may be the next chapter in our evolution. I will not pretend to know which scenario will prove correct. The honest position is that I do not know, that the evidence I currently see leans toward the darker reading, and that I would like very much to be wrong.
VII. Plasticity and its gravity
There is a deeper question running underneath all of this, and it is the one I have been circling without naming. I want to name it now, at the cost of admitting that what I am about to say is a description of a gap rather than the closing of one.
Neuroscience has supplied us with a word for the fact that the substrate changes in response to what processes it. The word is plasticity. It does work. It tells us the brain is not fixed, that experience leaves marks, that the substrate at sixty is not the substrate that was present at six. It is one of the better-supported findings in modern neuroscience and the literature on it is large and growing. What the word does not do is name the force that is doing the shaping. Plasticity describes the property of being shapeable, malleable, with a hundred trillion synapses shifting connection. It does not describe what determines which shape will emerge from a given pattern of input.
This is the gap I want to mark. The shaping force is not random, and the popular accounts of plasticity often elide this. A substrate exposed to a fragmentation diet does not become anything. It becomes specifically the kind of substrate that fragmentation produces. A substrate exposed to fluent cognitive substitutes does not become anything. It becomes specifically the kind of substrate that fluent substitution produces. Each input pattern has, if I may borrow a word from physics knowing it is being borrowed loosely, a gravitational signature, and the signature determines the trajectory of the shaping. We have a science of plasticity that tells us the clay is workable. We do not have an integrated science that tells us which shapes a given input pattern will pull the clay toward, across the relevant timescales and at the population level. The first science is mature. The second science, in the integrated form the question requires, barely exists.
It will help to make the gravity concrete. Compare two ways water shapes stone. The river carves the canyon over a million years. The flash flood carves it in an afternoon. Both are water, both are gravity, both are doing geological work. But the canyons they produce are different in their fundamentals. The river canyon has terraces, oxbows, the slow-arriving evidence of a force that had time to negotiate with the rock. The flood canyon is raw, gouged, a record of a velocity the rock could not respond to. The substrate is the same in both cases. The shaping force is the same name. What differs is the temporal signature of how the water was applied, and the temporal signature is the variable that determines which canyon emerges. The book is the river. The phone is the flash flood. The neuroplastic substrate is the canyon. A science of plasticity that does not name the temporal signature of the input has named the rock and the water and skipped over the only variable that determines which geology you end up living in.
The analogy stops short in one important respect, and the gap matters enough to name. Rivers and floods are weather. The phone is not. The temporal signature of the phone is not a natural phenomenon but an engineered one, and the engineering tradition behind it is a continuous line from B. F. Skinner’s pigeon boxes through the slot-machine industry to the feed. Variable-ratio reinforcement, the conditioning schedule that delivers reward on an unpredictable interval, is the most powerful behavioural shaping mechanism we know about. It is what makes the pigeon keep pecking the lever long after the pellet has stopped coming. It is what makes the gambler keep pulling the handle at three in the morning. It is also, by deliberate design, what makes the thumb pull down on the screen to refresh the feed, what makes the loot box compelling, what makes the inbox refresh produce a small reward signal even when nothing important has arrived. The gesture is the same gesture. The schedule is the same schedule. The neurochemistry is the same neurochemistry. The phone is not weather. It is a flood operated by a gambling commission. Addiction, on this reading, is not a side-effect of the platform’s operation that the engineers regret and would prefer to remove. It is the metric the engineers are paid to move, and the bonus structures of the companies depend on its rising. We have built, at population scale, the largest variable-ratio reinforcement chamber in human history, and we are calling its outputs the natural behaviour of the consumer. They are not. They are the trained behaviour of the subject. The category error is in the noun, and naming it correctly is the first step in any honest account of what the gravity is being applied by.
There is no scientific consensus that anything called gravity, in the sense I am using it here, is the right framing for what neuroscience does not yet name. This is the direction the question is pushing, not a finding the field has converged on. The reason the integrated science barely exists, I think, is that studying it would require a kind of disciplinary integration that the institutions do not yet reward. You cannot describe the shaping force on the substrate without describing what is doing the pulling, and what is doing the pulling is the process, the cultural environment, the medium, the diet of inputs, the daily encounter. The neuroscientist’s tools, in their current configuration, mostly stop at the boundary of the brain. The cognitive scientist’s tools mostly stop at the level of behaviour. The cultural critic’s tools mostly stop at the level of cultural production. The shaping force itself, the thing that runs across all of these, lives in the space between the institutional rooms, and there is no methodology that has been built to attend to it directly. The methodology, when someone builds it, will have to follow the trajectory of a single input pattern across substrate, behaviour, and culture without losing the granularity at any of the three levels, which is to say it will have to be a method the existing disciplines have, between them, made it almost impossible for any one researcher to learn.
So we have plasticity, which names the property. We have separate vocabularies for memory and attention and culture and medium, which name the inputs. We have no agreed name for the force by which the inputs reshape the substrate over time. The threshold argument from Part One is one description of the shaping force at work. Sub-threshold dwell time is a force that pulls the substrate, if the hypothesis holds, toward the inability to dwell. The integration argument is another description. Filled gaps pull the substrate toward the inability to integrate. Each is a description of the shaping at one point in its operation. None of them is a general account, and the general account is what does not yet exist.
I name this because I think the absence of the name is itself part of how the shaping continues unobserved. What cannot be described in an integrated way cannot be effectively studied in an integrated way, and what cannot be studied in an integrated way is unlikely to be effectively resisted. The political argument I want to make in Part Three is the same point in different language. The cultural critic has been describing, in cultural terms, what neuroscience should be describing in substrate terms, and the absence of the substrate description is part of why the cultural description still feels speculative when it should feel established. The work of integrating these descriptions is the work that remains.
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The argument so far has been biological and meta-scientific. It has named the threshold below which encoding fails and the gap in which the shaping force has neither name nor methodology. Part Three asks what a population, shaped under these conditions for two decades, becomes politically. It puts Socrates and Gramsci in the same room, and it ends where I think the argument has to end, which is on the practice that remains available to the noticer when the science that should be doing the noticing for us does not yet exist.