The hard core and the soft tissue
On the intimate dependency of facts and frames
An innocent Tweet made me recall a dinner, a few years ago, at the high table of a Cambridge college. One of those evenings where the candlelight makes everyone look clever and the sherry loosens convictions just enough to let them stumble into the open. Beside me sat a particle physicist of considerable reputation and, on my other side, a structural engineer whose quietness I misinterpreted as shyness until I noticed him sketching a cantilever on his napkin with the slow precision of a man who trusts only what can bear a load. The physicist, full of decanted certainty, was explaining to the table that philosophy was a finished project, that the natural sciences had long ago shouldered the vague chatter of the humanities aside and now stood alone as the sole demonstrably reliable path to uncovering the secrets of the universe. He did not use the phrase “hard scientism,” but he might as well have been wearing the badge. I smiled, nodded and let a silence settle, the kind I had learned to deploy from a Dutch grandfather who believed that an unoccupied pause in conversation was like an unobserved particle, potent with possibility.
When I finally spoke, I said something rather mild, something about how science delivers the facts, to be sure, yet making sense of them requires an act of interpretation that is, at heart, philosophical. Even when the scientist conducts the interpretation, he borrows assumptions about causality, evidence and existence that no experiment can supply. The engineer, who had been listening with the patience of someone accustomed to the slow curing of concrete, added without looking up from his napkin, “And then someone has to build something useful out of the whole thing, otherwise it’s just very expensive stamp collecting.” The physicist, to his credit, laughed. The conversation moved on to the college’s wine cellar. But the thought lodged and I have been polishing it ever since, turning it over in the part of my mind that still practises the rigour of mathematical intuitionism while simultaneously grazing in the unrulier meadows of what I shall call, for want of a better term, non-scientific philosophy.
The episode has come to feel like a seed from which a rather particular intellectual plant might grow. I refer to the possibility of something that could be called, partly in jest but with a deadpan face, hard philosophy. What I mean is a mode of inquiry that would meet the hard sciences on their own ground, adopt their exacting standards of clarity and accountability, but apply those standards to the scaffolding of concepts, the lifeworld preconditions and the interpretative frameworks without which the contents of the natural world would remain mute. It would be a discipline that gazes patiently at the physicist and observes, with all the courtesy of a Cantabrigian senior tutor, “You have collected a great many facts, I grant you, but you seem to be having some difficulty making heads or tails of them. Might I be of assistance?”
Of course, the very phrase “hard philosophy” wears a wicked grin. It tweaks the nose of those who insist that only the hard sciences are reliably truth-conducive, because it borrows their own rhetoric of hardness, tough, testable, unflinching, and turns it back upon the act of sense-making that they perform instinctively while pretending they do not. If they will not come to philosophy, philosophy will come to them, dressed in a lab coat, carrying a clipboard and asking terribly awkward questions about what, precisely, they mean by “demonstrably reliable.” This is not so much a territorial skirmish as more of an invitation to a dance. The scientist may lead, but the philosopher is permitted to remark, sotto voce, that the floor on which they are dancing has been laid by craftsmen who are not themselves dancers and that the music to which they move was composed by a tradition they have not read.
Let us, for a moment, take the assertion of hard scientism with the seriousness it imagines it deserves. The claim is that, when it comes to understanding the universe and reality, the only demonstrably reliable method is that of the hard sciences, physics, chemistry, biology and their more mathematical cousins. If we ask, “What is the demonstrably reliable method by which you arrived at that claim?” the room suddenly falls quiet. It was not arrived at by particle accelerator. It was not teased out of a double-blind trial. It emerges fully formed from a certain philosophical position, to be precise a commitment to a verificationist epistemology that, if applied to itself, withers under its own criterion. It is, to borrow a phrase from a certain Viennese thinker who later found a perch in this university, a ladder that must be kicked away after climbing. The hard scientism advocate wants to have kicked away the ladder while still standing on it and to deny that anyone else might need a ladder in the first place. The first friendly insult from the Hard philosophy is to point out that the Emperor’s new methodology is terribly impressive but rather transparent around the midsection.
This is not to disparage the sciences. Far from it. The sciences have, with astonishing success, provided us with an ever-deepening reservoir of facts. They have revealed the structure of the cosmos, the dance of the subatomic, the slow majesty of evolution. They have given us, quite literally, the light by which we read and the instruments with which we peer into the cell. To deny the epistemic potency of the hard sciences would be as foolish as to deny the existence of the ground beneath one’s feet. Yet ground is, by itself, a rather dull thing. It needs a landscape designer, someone to think about where the paths might lead, what the view might mean and whether we ought to put a bench under that particular oak. The sciences tell you the chemical composition of the soil; philosophy wonders whether the garden is beautiful and whether the bench should face east for a reason beyond the sunrise. And engineering, bless its practical heart, builds the bench.
The temptation is to divide the labour neatly: science gathers the dots, philosophy connects them, engineering builds the contraption. This is a tempting tripartite harmony, and it contains a good deal of truth. But it is also too tidy. The relationships are recursive, not linear. The engineer’s contraption, say, a digital communications network, alters the lifeworld within which both scientist and philosopher ask their questions. The philosopher’s dot-connecting may reveal that some of the dots were never properly gathered or that the dot-gatherer was, without realising it, already drawing a shape. The scientist, interpreting his own data, is wading into philosophy whether he admits it or not. He is like the character from a French comedy who discovers, to his astonishment, that he has been speaking prose all his life. Hard philosophy would be the discreet friend who taps him on the shoulder and whispers, “Quite so. And now that you are aware of it, perhaps you might like to speak it a little better.”
The intuitionist tradition in the philosophy of mathematics, in which I have spent a considerable portion of my intellectual development, offers a particularly sharp lens for this kind of work. Intuitionism, born in the lively and rather stubborn mind of a Dutch mathematician who liked to disagree with almost everyone, holds that mathematical objects are mental constructions. A mathematical truth is not discovered as if it were a pre-existing landscape waiting for an explorer’s flag; it is made, piece by piece, through acts of rigorous construction according to rules we ourselves have internalised. The law of excluded middle, the reliable old friend of classical logic, is now retired, not because it is false but because it can outrun our constructive capacities. The claim that a proposition must be either true or false, even when no proof or disproof is available to any finite mind, presumes a godlike access to a completed infinite domain that we simply do not possess.
Now, we do not have to be a card-carrying intuitionist in mathematics to see how this sensibility migrates fruitfully into the interpretation of scientific facts. Scientific data, left to themselves, do not arrange into theories. The act of interpretation is constructive; it arranges the inert numbers into a framework of concepts that was not itself extracted from the data. Is the wavefunction to pick a simple example, a real physical entity or a mathematical tool for calculating probabilities? The data, strictly speaking, are silent on the matter. Taking a stance constructs an ontology to decide what kind of world we are prepared to inhabit. We may do so with elegance, coherence and predictive power, but we cannot do so without an act of philosophical imagination. The hard scientist who insists he is merely “reading off” the facts is, if I may be permitted a small friendly jab, behaving like a visitor to a gallery who believes the paintings have arranged themselves on the walls.
Hard philosophy would take the intuitionist’s constructive suspicion and apply it to the entire range of experience that the sciences touch but cannot fold within themselves. It would insist that whenever we claim to know something about reality, we must be able to exhibit, step by step, the explicit construction that brought us to that claim, including the conceptual materials we used, the lifeworld background that made those materials available and the normative commitments that guided our choices. This is a rather more demanding standard than the sciences typically apply to their own philosophical undercarriage. They are accustomed to testing hypotheses against observation, which is admirable, but they rarely test the very categories of observation, object, cause, law, probability, against the wider texture of human understanding. Hard philosophy would be the discipline that says, with a straight face, “Show your working, if you please. Every last bit of it.”
This brings us to the lifeworld, a notion that a certain Frankfurt School theorist placed at the heart of his account of communicative action. The lifeworld is the unthematised background of shared meanings, norms and practices that makes scientific inquiry possible in the first place. Before a physicist can measure a particle, a vast infrastructure of linguistic understanding, institutional trust and cultural value must already be in place. The laboratory is not a self-interpreting text; it is a richly hermeneutic environment, saturated with what the philosopher of hermeneutics called prejudgements. Scientists learn to ignore this background in the name of objectivity and for many operational purposes this bracketing is perfectly sensible. But when they turn around and declare that only their bracketed method gives access to reality, they have committed what hard philosophy might call the fallacy of the forgotten horizon. They have mistaken the condition of their own seeing for a feature of the seen.
In the digital public sphere, this forgetfulness has consequences that are no longer merely academic. We now live in a world where enormous quantities of scientific and quasi-scientific information circulate at bewildering speed, stripped of the interpretative frameworks that gave them sense. A nutritional study appears one morning, is contradicted by another that evening and both are shared by millions who lack the time or education to assess the methodological hinterland that might distinguish them. The public sphere, which should be the playground of what is called communicative action, the rational, uncoerced exchange of reasons aimed at mutual understanding, is degraded into a mere marketplace of strategic assertion. Facts become missiles. Expertise becomes a badge worn by whoever shouts most persuasively. The hard sciences contribute to this predicament because they produce truths that are, in a radical sense, unfinished. They need interpretation and they need a public conversation capable of bearing the weight of that interpretation. They need, in short, philosophy.
This is where we land at the personal and the intellectual crossroads. My own lifeworld was shaped, in its younger years, by a loose and undoctrinaire Daoism, the kind that drifts through a household like the scent of incense, never insisting but always present. The genial scepticism toward fixed categories and a sense that the way can be pointed to but not named, predisposed me to a certain wariness of any claim to have the final word. Later, when I encountered the intuitionist’s insistence that mathematical infinity is not a completed thing but an ever-open possibility, it felt less like a discovery than a homecoming. And when I began to work at the intersection of constructive mathematics and the theory of communicative action, I found myself drawn to the problem of how a digital public sphere, flooded with facts, could ever become a space of genuine understanding.
Hard philosophy, as I am imagining it, would be part of the answer. It would be a philosophy that does not retreat to the seminar room but plants itself squarely at the junction where data meets deliberation. It would be rigorous, in the sense that it demands of every knowledge claim a full accounting of its construction, not just its empirical verification. It would be public, in the sense that it refuses the luxury of a private language and submits its reasons to the ungainly, beautiful and often maddening process of communicative exchange. It would be, in a word, hard because it holds itself to a standard of lucidity and accountability that is, if anything, more exacting than anything the sciences require of themselves when they step outside their native domain.
We could object that this already exists, that philosophy has been doing precisely this for centuries and that all I am offering is a new label for a very old practice. There is some justice in this. The critical tradition that runs through the Enlightenment, through the linguistic turn, through the pragmatist attention to consequences, has always insisted that the ways we think are as important as what we think. Yet the label matters, because the world we inhabit has awarded a cultural authority to the hard sciences so overwhelming that philosophy has, in many quarters, become defensive, self-marginalising or else wrapped itself in a protective irony that makes it easy to dismiss. To speak of “hard philosophy” reframes the contest on terms that the wider culture can understand. It says, in effect, “You value hardness? Very well, let us see how hard you are willing to be when it comes to the conditions of your own knowing. Let us see who blinks first.”
The engineer re-enters, napkin and all. Engineering turns the discoveries into contraptions because that is, indeed, what humans do. We are Homo faber, the making animal, as much as we are Homo sapiens. But the contraptions are not philosophically neutral. A social media platform is an engineered object, but it is also a materialised theory of human connection, a set of assumptions about what communication is and what it is for. When we build without reflecting on those assumptions, the assumptions build us. Hard philosophy would insist on a partnership with engineering that goes beyond service. It would not treat the engineer as a downstream technician who merely implements what science discovers, but as a full partner in the construction of the lifeworld, equally accountable to the question, “What kind of world do we wish to create?” The physicist discovers the electron, the engineer builds the wire, the philosopher asks whether the wire will carry a conversation or a command. And then the public, we may hope, deliberates.
This requires a certain attitude toward the digital sphere, which currently resembles a vast machine for the production of what in media theory is called foaming information. The foam is clogged with facts that have become unmoored from the interpretative communities that could give them weight. The hard philosopher, in this environment, would function as a kind of conceptual engineer, designing frameworks that help the public reconstruct meaning from the flood. This is not a matter of condescendingly telling people what to think. It is, far more demandingly, a matter of creating the conditions in which people can think together, with the same care that we expect from a well-run laboratory but extended to the messier questions of human ends. The tools for this already exist, scattered through the tradition: the intuitionist’s constructive proofs, the communicative theorist’s ideal speech situation, the Daoist’s gentle reminder that the map is not the territory and that the name is not the thing. Hard philosophy would weave these into a coherent practice.
Allow me, at this point, a modest prediction. Should hard philosophy ever become a recognised field, I picture a small, impeccably designed journal, perhaps printed on paper that feels satisfyingly substantial, it will attract two kinds of adherent. The first will be philosophers who have grown weary of being told they are obsolete and have decided to learn just enough science to make their interlocutors uncomfortable. The second will be scientists who have, in their quieter moments, suspected that something important escapes their equations and who possess the courage to admit it. The friendship between these two groups will be spiky, irreverent and profoundly productive. At conferences, the physicists will accuse the philosophers of not understanding non-locality and the philosophers will reply that the physicists do not understand the difference between a necessary and a sufficient condition. Everyone will go to the pub afterward and the real work will begin.
The tone of hard philosophy, as I conceive it, will be one of its defining features. It must be rigorous without being humourless, precise without being pedantic and willing to deploy the occasional baroque insult in the service of clarity. The aim is not to wound but to wake. To tell a scientist that his ontology is a mess may sound cruel, but it is an act of intellectual friendship if it prompts him to clean it up. A certain kind of erudite wit, the kind that flourishes in the senior common rooms of ancient universities, would be the genre’s native voice. It would make heavy use of understatement, such as the most devastating of English weapons. “I wonder,” we might write in a review, “whether the author has fully acquainted himself with the past three centuries of reflection on the mind-body problem. We suspect not.” The effect would be bracing and occasionally hilarious.
What would hard philosophy actually produce? Not another grand system, to be filed alongside the many grand systems that gather dust in the library stacks. I expect it would rather produce analyses of key concepts, evidence, probability, emergence, modelling, confirmation, reduction, with the same care that a mathematician constructs a proof, but always with an eye on the lifeworld contexts that give those concepts their meaning. It would produce case studies of scientific interpretation gone wrong. This Is not to discredit science in general but as a way of making the interpretative labour that is always being performed visible. It would produce a new kind of public intellectual, someone as comfortable with the equations of general relativity as with the dialectical twists of a Habermasian discourse and who can explain why the one requires the other in language that is neither condescending nor opaque.
And it would, I suspect, help to rekindle a friendship that has soured in the modern academy: the friendship between science and the humanities. The two have drifted apart into mutual incomprehension and occasional hostility, a state of affairs that pleases no one except those who profit from intellectual tribalism. Hard philosophy, precisely because it refuses to be either purely scientific or purely humanistic but demands a fusion of the two, would act as a bridge. It would remind the sciences that they are a human practice, pursued by beings with histories, cultures and values. It would remind the humanities that truth is not whatever we feel it to be and that the disciplined pursuit of knowledge is both a moral as well as an epistemic achievement. If that sounds grandiose, I must plead guilty, but a certain grandeur, lightly worn, is perhaps not a bad thing in an era that has learned to be cynical about everything except its own cynicism.
Permit me a final, mischievous thought. The most accomplished practitioners of hard philosophy, were it to flourish, might turn out not to be professional philosophers at all. They might be mathematicians who cannot help asking what it means to prove something. They might be journalists who, with a sharp eye for detail and an insistence on context, would not only reconstruct the reported events into a story, but also build the frameworks of interpretation within which events become intelligible. They might be, if I am entirely honest, the quiet engineer at the dinner, who understood that a structure must not only stand physically but also in the minds of those who use it and who sketched his cantilever so beautifully that the physicist, at last, fell silent and looked.
I have not, I realise, defined hard philosophy with the crispness that the term itself demands. This is partly deliberate. To define too soon would commit the very sin that hard scientism commits: assuming that the categories are fixed before the inquiry has taken its course. Let us say, provisionally, that hard philosophy is the rigorous, publicly accountable examination of the conceptual and lifeworld conditions that make scientific knowledge possible, coupled with an insistence that those conditions are themselves a legitimate domain of inquiry, not reducible to the objects of any particular science. It is, if you like, the science of science’s own shadow. And like a shadow, it is always there, even when the light is brightest, waiting for someone to notice its shape.
The journal I mentioned earlier would, I like to think, carry as its header a line from a Cambridge philosopher who understood, better than most, the point at which language must yield to silence. But since we are not yet at that point, the motto might be something more cheeky, something I jotted down after that dinner and have been carrying around ever since: “Even the hardest facts are soft until you’ve framed them.” The physicist at the high table, should he get a chance to read this, will recognise the provocation. I raise a glass in his direction, in genuine affection. He is, after all, keeping the rest of us in business.