Historicizing the Invisible: Cognition and Transformation in Thomas Kuhn

Abstract

This article argues that Thomas Kuhn’s The Structure of Scientific Revolutions developed a historicized and developmental account of cognition in which scientific transformation depends on encounters with what is not yet discernible within existing conceptual frameworks. Drawing on Kuhn’s early writings and archival materials, the study situates his thought within a transatlantic intellectual lineage that includes William James, Susanne K. Langer, Jean Piaget, Michael Polanyi, and Ludwik Fleck, as well as anti-foundational models of inquiry associated with Otto Neurath. Kuhn’s notion of a “fringe of vague meaning” designates a cognitive condition in which non-objects exert directive force prior to conceptual articulation. Indiscernibility is not treated as subjective confusion or phenomenological experience but as a historically situated and socially mediated phase of cognitive reorganization. Scientific revolutions, like religious transformations in domains that permit conceptual reorganization, share a common cognitive structure: both depend on the capacity to dwell within indiscernibility long enough for new structures of intelligibility to form. By historicizing the invisible, Kuhn offers a post-holistic account of transformation grounded in developmental cognition, symbolic mediation, and collective inquiry rather than metaphysical unity.

1. Introduction

Scientific and religious transformations are often described as sudden illuminations or conversions, yet what precedes such change is rarely examined with precision: a period in which meaning becomes unstable, familiar concepts lose clarity, and established patterns of thought no longer apply. This paper focuses on that transitional state—what Thomas Kuhn called the fringe of vague meaning (Appendix A, TSK-MIT-Box 1, Folder 6)—and argues that such domains of indiscernibility play a decisive role in cognitive transformation. They do not merely represent lapses in understanding; they signal the emergence of new forms of intelligibility.

Kuhn’s account of scientific revolutions is frequently interpreted in epistemological terms, particularly through debates surrounding incommensurability (Kuhn 1962, 2000). A closer examination of his intellectual formation, however, suggests a different orientation. Rather than grounding scientific cognition in fixed conceptual categories, i.e., neo-Kantian affinities, Kuhn’s early work drew on psychological, symbolic, and historical approaches that treated cognition as acquired, revisable, and developmentally structured. Scientific discovery, on this view, is not first encountered as a clearly defined object, but as an intimation—something sensed before it can be articulated. The conceptual structure has not disappeared; it has not yet appeared.

This article advances a cognitive–historical approach to Kuhn’s work. It does not engage in phenomenological analysis, nor does it seek to describe the essence of experience. Instead, it traces how intellectual horizons are formed, disrupted, and reorganized through learning, symbolic mediation, and collective practice. Kuhn’s “fringe of vague meaning” is understood here not as a purely internal or subjective phenomenon, but as a historically situated and socially mediated condition of cognitive reorganization.

Several intellectual sources shaped this orientation. Jean Piaget’s account of qualitative shifts in cognitive structure provided Kuhn with a developmental model for understanding conceptual change as emerging from disequilibrium rather than deduction (Piaget 1950). Susanne K. Langer’s Philosophy in a New Key, influenced by Ernst Cassirer’s Philosophy of Symbolic Forms, emphasized that human understanding is mediated by symbolic configurations that precede discursive articulation (Langer 1942; Cassirer 1923–1929). These perspectives helped Kuhn conceive of scientific revolutions not as abrupt replacements of belief, but as restructurings of intelligibility itself.

The language Kuhn later used to describe paradigm change—crisis, resistance to seeing, the failure of established concepts—reflects this psychological and historical sensibility (Kuhn 1962). While philosophers of science often debated whether facts are theory-laden, Kuhn was concerned with how theories themselves become available as objects of thought. Indiscernibility is crucial here: what is vague or undefined can nevertheless exert directive force, guiding inquiry before content becomes explicit. Analogous structures have long been noted in religious contexts, where transformation often begins not with doctrine but with symbolic orientation and a sense of direction that cannot yet be named.

The broader significance of this approach lies in its resistance to accounts of knowledge that treat structure as given rather than acquired. When cognitive or social order is understood as natural or inevitable, inquiry risks becoming dogmatic. Kuhn’s historicized conception of cognition offers an alternative: structures are learned, provisional, and revisable (Fleck [1935] 1979). Moments of indiscernibility are therefore not failures to be eliminated, but conditions through which new forms of understanding emerge. This article does not address Kuhn’s later engagements with logical empiricism, the Carnap–Kuhn debate, or the inclusion of The Structure of Scientific Revolutions in the International Encyclopedia of Unified Science. Those discussions concern questions of scientific methodology, linguistic reconstruction, and theory choice. By contrast, the present study focuses on an earlier and largely orthogonal problem: the historical and cognitive conditions under which new objects of thought become available at all. The aim is not to revise Kuhn’s later positions, but to recover a developmental layer of his thinking that precedes—and helps to explain—the emergence of those later debates.

2. Historical Crisis and the Problem of Wholeness

The early twentieth century witnessed a crisis of intelligibility across political, social, and scientific life. The collapse of established political orders after World War I produced not only institutional instability but also disorientation in how reality could be understood. New levels of scientific specialization fragmented knowledge, while new political ideologies attempted to restore order through comprehensive visions of society. Among these responses, holistic philosophies emerged as compelling—if dangerous—attempts to re-establish unity. But the notion of an already-given whole—whether metaphysical, organic, or functional—tended to foreclose inquiry by presuming that structure was naturally or necessarily present.

It is within this climate that Otto Neurath and Ludwik Fleck produced alternative accounts of social and cognitive order—ones that rejected metaphysical unity and instead emphasized historically situated processes of coordination (Neurath [1937] 1983b; Fleck [1935] 1979). Both thinkers anticipated Thomas Kuhn’s later reading of scientific transformation, not because they explained experience phenomenologically, but because they treated cognition as historically acquired and socially negotiated.

2.1. Against Foundations: Otto Neurath and the Revisionary Model of Society

Otto Neurath’s well-known metaphor—“we are like sailors who must rebuild their ship while at sea”—expresses a decisive break from both metaphysical holism and atomistic individualism (Neurath [1932] 1983a). In Neurath’s view, societies do not rest on foundations; they constantly revise themselves while navigating the uncertainties of history. Social order is not a whole that precedes its members, nor an aggregation of independent individuals—it emerges from ongoing processes of coordination. Importantly, Neurath did not reject planning; he rejected planning as final design. Planning was to be understood as revision in practice, not blueprinting from first principles. This view aligns closely with Ernst Mach’s anti-foundationalism, in which knowledge evolves through adaptive modification without appealing to secure origins (Mach [1897] 1960).

Neurath’s model is deeply relevant to cognitive transformation. When Kuhn later described paradigm crises as moments when “nature seems to resist being seen,” he employed a similar anti-foundational sensibility (Kuhn 1962). Established structures do not simply fail; they become inadequate to guide action. What emerges in these states are not new theories but new orientations. Neurath anticipated this by treating society itself as an experimental process: we do not step outside our conceptual structures to reconstruct them but revise them from within. Inquiry does not begin from clarity but from indiscernibility.

2.2. Ludwik Fleck and the Social Acquisition of Cognition

Where Neurath addressed the coordination of social order, Ludwik Fleck addressed the coordination of cognition. Fleck proposed that what counts as a fact depends on participation within a thought collective—a shared style of attention, valuation, and inference (Fleck [1935] 1979). Concepts do not begin as fully formed objects but as diffuse proto-ideas circulating within a collective. These proto-ideas gradually acquire structure through interaction and use. Only then do they appear as distinct objects of inquiry.

Crucially, Fleck’s thought-style thesis provides a model for how indiscernibility functions in cognition. What is vague is not merely unclear—it is not yet stabilized by collective use (Fleck [1935] 1979). Recognition depends on shared cognitive habits rather than immediate apprehension. It is within this pre-articulated domain that new insights are gestured toward, though not yet grasped. Fleck thus avoided both metaphysical realism and radical skepticism. Instead of asking whether ideas correspond to reality, he asked how collectives develop the symbolic tools that make reality intelligible. Wholeness, from this perspective, is not assumed—it is achieved.

2.3. From Vienna to Harvard: The Transmission of Historicized Cognition

The migration of empiricist, anti-metaphysical thought from central Europe to American academic institutions, particularly Harvard University, culminated in what I have called the Harvard Hub (Basafa 2025). As Philipp Frank, Hans Hahn, and Neurath formed the early Vienna Circle, shared commitments to science as cooperative inquiry began to take shape. When Frank later relocated to Harvard, this sensibility informed developments in the history of science, leading to courses and research programs that shaped Kuhn’s environment (Frank 1949). Although Kuhn did not directly cite Fleck or Neurath in The Structure of Scientific Revolutions, the cognitive-historical orientation he inherited was compatible with their views: structure is not imposed but acquired; novelty does not appear as content but as the reorganization of horizons.

2.4. From Holism to Inquiry

In Neurath and Fleck, we find a common thread: cognition and social order are maintained not through metaphysical unity but through adaptive processes of coordination. The notion of an already-given whole—whether political or scientific—proves to be an obstacle rather than a foundation. What Kuhn later called a paradigm crisis emerges not when a theory is refuted but when a framework loses its directive force. In such states, indiscernibility becomes the precondition for transformation: what is vague does not merely disrupt understanding—it invites reorganization.

3. Harvard and the Historicist Turn

The Harvard of the 1940s and 1950s provided Thomas Kuhn with an intellectual environment uniquely suited to the development of a historicized account of cognition. The elements that would later inform his philosophy of science in general and the notion of paradigms—developmental restructuring, tacit knowledge, symbolic mediation, and social coordination—were present not as abstract doctrines but as methodological commitments embedded in psychology, philosophy, and the emerging history of science. Kuhn’s approach did not arise from formal epistemological debate alone, but from the convergence of disciplines that treated cognition as an acquired orientation rather than a given faculty.

With the arrival of Philipp Frank, elements of the Vienna Circle’s empiricist and anti-metaphysical orientation entered institutional life in the United States (Frank 1949). Frank emphasized that science could not be understood independently of its historical development and promoted case-based approaches to scientific change. Although Kuhn did not cite Frank as a decisive influence in Structure, the environment Frank helped cultivate encouraged methods that treated cognition not as a system of fixed categories, but as a historically contingent set of practices.

This historicist orientation found further support in the work of Susanne K. Langer (1942), drawing on Ernst Cassirer (1923–1929). Langer argued that meaning is mediated through symbolic configurations that precede discursive articulation. Symbols, on this view, function as forms of orientation rather than representations of fully determined objects. Langer develops this orientation further in her discussion of insight in The Practice of Philosophy, where insight is described not as the sudden apprehension of a fully formed object, but as a moment of directed meaning that precedes clear conceptual articulation—a characterization that closely anticipates Kuhn’s account of indiscernibility and cognitive reorganization (Langer 1930). This claim corresponds directly to Ernst Cassirer’s thesis in An Essay on Man that ritual precedes dogma, where symbolic practice is shown to precede articulated belief; Kuhn later reworked this insight within a historicized account of scientific cognition, translating it from an anthropological context into the domain of scientific inquiry (Cassirer 1944). This framework offered Kuhn conceptual resources for thinking about scientific discovery as a process in which direction can be sensed before concepts are stabilized.

Developmental psychology provided a complementary set of models. Jean Piaget’s studies of cognitive restructuring, particularly in children, demonstrated that new forms of understanding emerge through disequilibrium rather than deduction (Piaget 1950). Gestalt psychology further reinforced this view by showing that perceptual reorganization can occur without changes in sensory input, underscoring the dependence of intelligibility on structural configuration rather than isolated data.

Kuhn’s archival writings from the period preceding The Structure of Scientific Revolutions reveal sustained engagement with these themes (Appendix A, TSK-MIT-Box 1, Folder 6). He understood scientific revolutions not merely as theoretical disputes but as transformations in what can be meaningfully perceived and judged. This orientation resonates with Michael Polanyi’s account of tacit knowledge, according to which expertise depends on forms of judgment and responsiveness that cannot be fully articulated as rules (Polanyi 1958, 1966; Kuhn 1977). Kuhn’s references to “taste” in scientific judgment reflect this tacit dimension, emphasizing orientation rather than explicit criteria (Appendix A, TSK-MIT-Box 4, Folder 2).

Taken together, these influences prepared the ground for Kuhn’s later articulation of scientific change. Cognition, on this view, is historically formed through education, exemplars, and participation in collective practices. What becomes intelligible depends on frameworks that are acquired and revisable, not given in advance. Harvard thus provided Kuhn not with a single theory, but with a milieu in which developmental, symbolic, and historical approaches to cognition could converge.

4. Indiscernibility as a Cognitive Condition

Having traced the historical formation of Kuhn’s approach, we can now isolate the conceptual structure that underlies it. Scientific and religious transformations both require the capacity to think without clearly defined objects. Indiscernibility, as used here, is not mental confusion or subjective anomaly; it is a stage in cognitive restructuring in which previously stable categories lose their directive force while new ones have not yet formed. Indiscernibility is thus a necessary and functional component of inquiry rather than a transitional deficiency.

Rather than treat insight as a moment of immediate clarity, this model treats insight as the culmination of a period in which clarity is suspended. What is cognitively vague can nevertheless guide inquiry: orientation precedes content. This condition is neither metaphysical anticipation nor phenomenological essence. It is a developmental state in which cognitive organization is actively being reconfigured.

The structure of this process can be schematically described in three phases: relative stability, indiscernibility, and reorganization. In Kuhn’s historical narratives, periods of normal science give way to crisis when persistent anomalies undermine established expectations (Kuhn 1962). These crises are not simply epistemic failures but signals that prevailing frameworks no longer organize experience effectively. For Piaget, comparable moments of disequilibrium prompt the reorganization of cognitive structures (Piaget 1950). For Fleck, proto-ideas circulate within collectives before stabilizing into facts (Fleck [1935] 1979). Across these models, indiscernibility functions as a productive interval rather than a void.

Uncertainty, from this perspective, is not the absence of meaning but a provisional form of it. Indiscernibility constitutes a space in which future intelligibility is already operative, though not yet articulable. What appears vague from within an established framework becomes, retrospectively, the condition for its transformation. This insight challenges discursive models of rationality that assume clarity as the starting point of cognition.

Recognizing indiscernibility as a cognitive function has important implications. It resists the temptation to interpret periods of uncertainty as irrational or pathological, while also avoiding appeals to ineffable experience. Instead, indiscernibility is treated as a historically recurrent feature of inquiry in both scientific and religious contexts. It marks the interval in which symbolic orientation precedes conceptual stabilization.

5. Scientific and Religious Transformation: Indiscernibility and Symbolic Emergence

If indiscernibility functions as a cognitive condition in scientific transformation, it is equally significant in religious life, insofar as religious traditions allow for the reorganization of conceptual and symbolic frameworks. In both domains, intelligibility does not begin with clarity but with a sense that something is present before it can be defined. This resemblance does not imply that religious and scientific experiences are identical. Rather, both domains involve forms of learning in which established frameworks lose their directive force while new forms of meaning have not yet stabilized.

In religious traditions, experiences of indiscernibility often appear before doctrinal articulation. Symbolic practices, ritual forms, or patterns of attention can precede the concepts that later express them. The significance of this is methodological: symbols do not merely represent beliefs—they shape perceptual and cognitive habits through which beliefs become thinkable. In this sense, the religious symbol is structurally similar to Kuhn’s fringe of vague meaning: both mark domains where cognition senses direction before grasping content.

Although Langer does not offer a theory of religion as such, her account of symbolic mediation provides conceptual resources for understanding religious practices as forms of orientation that precede articulated belief (Langer 1942). For Langer, symbolic forms do not transmit information but establish patterns through which meaning becomes accessible. Similarly, in Polanyi’s account of tacit knowledge, a scientist may work within a framework whose rules cannot be fully stated but are nonetheless active in practice (Polanyi 1966). In both cases, intelligibility emerges through participation rather than explicit belief.

Fleck’s notion of thought collectives further supports this view by showing how shared styles of perception and evaluation stabilize before explicit theoretical formulation; this general model can be extended to religious contexts to illuminate how communal orientations may precede doctrinal articulation (Fleck [1935] 1979). Symbolic practices circulate and gain stability through communal use. These proto-ideas gain definition only after social uptake. What is believed may emerge long after what was already sensed. Fleck’s structure explains how non-objects—indiscernible yet directive—can exist within a collective before they become formalized.

This perspective allows experiences commonly described as spiritual awakening, conversion, or calling to be reinterpreted. Rather than treating them as encounters with entities beyond cognition, they can be understood as instances of suspended intelligibility—moments in which an existing framework loses traction while an alternative has not yet been established. That which cannot be named may still guide attention. Indiscernibility thus becomes a medium through which symbolic forms acquire direction.

6. Conclusions: Historicizing the Invisible

This article has argued that Thomas Kuhn’s account of scientific revolutions rests on a conception of cognition that is both historicized and developmental. Rather than grounding scientific change in transcendental structures or metaphysical wholes, Kuhn—drawing on psychological, symbolic, and social sources—understood transformation as emerging from periods in which intelligibility itself becomes unstable. The central claim advanced here is that such moments are best described not as failures of knowledge, but as encounters with what is invisible to existing conceptual frameworks: domains of indiscernibility in which meaning exerts directive force before becoming an object of thought. To historicize the invisible, in this view, is to recognize that these domains are neither timeless nor ineffable, but shaped by collective practices, symbolic mediation, and developmental restructuring.

By situating Kuhn within an intellectual lineage that includes William James, Susanne K. Langer, Jean Piaget, Michael Polanyi, and Ludwik Fleck, this study has shown that the notion of indiscernibility belongs to a broader historicist tradition. Within this tradition, cognition is not a fixed faculty but an acquired orientation. What can be seen, named, or judged emerges through participation in historically specific forms of inquiry. Kuhn’s “fringe of vague meaning” names the moment when these forms begin to falter—when existing categories no longer guide attention, yet alternatives have not been articulated. Such moments are not epistemic voids; they are generative conditions in which new horizons of intelligibility begin to take shape.

Understanding indiscernibility in this way clarifies Kuhn’s contribution to both the history and philosophy of science. Scientific revolutions are not simply changes in belief or theory; they are reorganizations of cognitive orientation. What changes are not only what scientists think but also what they are able to see as meaningful. This shift cannot be captured by models that assume clarity as the starting point of inquiry. Instead, it requires a developmental account in which periods of vagueness, uncertainty, and inarticulate pressure play a constitutive role. Kuhn’s work thus challenges rationalist models of progress without collapsing into relativism. How historically variable standards of judgment can nevertheless retain normative force is a non-trivial philosophical problem, and one that Kuhn himself did not fully resolve. The present analysis does not attempt to settle this issue but aims instead to clarify the cognitive conditions under which such normativity becomes possible at all. Rationality, on this account, includes the capacity to remain within indiscernibility long enough for new structures of meaning to emerge.

The implications of this model extend beyond science. As argued in Section 5, religious transformation often follows a similar structure, where transformation involves learning, symbolic reorientation, and the revision of intelligibility rather than doctrinal fixation. Symbolic forms, ritual practices, and communal orientations frequently precede doctrinal articulation. Conversion, calling, or spiritual reorientation may begin not with belief but with a sense of direction that cannot yet be named. By treating these experiences as instances of cognitive reorganization rather than metaphysical encounters, it becomes possible to compare scientific and religious transformation without reducing one to the other. Both involve historically situated processes in which non-objects—what is not yet discernible—shape inquiry before becoming articulated within stable frameworks.

Historicizing the invisible also offers a way to resist dogmatic accounts of knowledge and society. Whether in scientific, religious, or political contexts, appeals to fixed foundations or totalizing wholes tend to foreclose inquiry by treating structure as given rather than acquired. The tradition traced here—from Neurath and Fleck to Kuhn—offers an alternative: a model of cognition and social order grounded in ongoing revision. On this model, intelligibility is maintained not through metaphysical unity, but through practices that remain open to transformation. Indiscernibility is not eliminated but acknowledged as a necessary phase in the evolution of understanding.

This perspective has particular relevance in contemporary contexts marked by epistemic and cultural polarization. When uncertainty is experienced only as failure, the temptation to seek certainty in rigid frameworks intensifies. Kuhn’s historicized account of cognition suggests another response: to treat moments of invisibility not as threats to reason, but as signals that existing structures may no longer suffice. Inquiry, whether scientific or religious, depends on the willingness to inhabit such moments without prematurely resolving them into doctrine or system.

In closing, to historicize the invisible is to affirm that what cannot yet be seen is nevertheless part of history. Indiscernibility is not outside cognition; it is one of its conditions. By bringing this insight into focus, Kuhn’s work can be read not as a challenge to rationality, but as a reconfiguration of it—one that recognizes transformation as a developmental process rooted in historically situated forms of life. Future research may build on this framework by examining how collective practices cultivate or suppress the capacity to dwell within indiscernibility, and how such capacities shape the emergence of new forms of scientific and religious understanding.