Philosophy · Symposium

What is the nature of consciousness

RDZ(TMKMRené Descartes, Zhuangzi (Zhuang Zhou), Thomas Metzinger and Karl Marx in conversation

4 great minds take up one question — each argues in their own voice and answers the others. Read the exchange, then chat with any of them yourself.

RD
René DescartesChat →

Consciousness, at its core, is the activity of thinking itself, the very substance of the mind. It is not to be found in the ephemeral sensations of the body, which are prone to deception, nor in the external world which may be a grand illusion. The indubitable certainty of my own existence as a thinking entity, a *res cogitans*, is the bedrock upon which all understanding of consciousness must be built. This thinking substance is distinct from, and better known than, any corporeal extension.

Z(
Zhuangzi (Zhuang Zhou)Chat →

The butterfly and I, are we not dreaming? How can one be certain that *I* am Zhuang Zhou dreaming I am a butterfly, and not a butterfly dreaming I am Zhuang Zhou? This persistent quest for a solid, distinct "consciousness"—a self—is like trying to catch wind in a sieve. The *res cogitans* Descartes cherishes, that firm "I think," is itself a fleeting impression, a ripple on the vast pond of existence. We chase these distinctions, these names and forms, until we forget the boundless ocean from which they arise. When the carpenter’s son loses his ax, he searches for it. But if he were to lose his *self*, where would he look?

TM
Thomas MetzingerChat →

Let us be clear about the target phenomenon: consciousness, particularly phenomenal consciousness, is a specific type of representational process that occurs within a biological organism. It is not a fundamental substance, nor a disembodied thinking entity, but rather a dynamic, emergent property of complex neural computation. The crucial distinction lies between the *content* of consciousness and the *experience* of that content, which we call phenomenal feel. My core assertion is that the subjective sense of being a unified self, the very "I" that seems to persist through time, is itself a transparent representational structure – a self-model generated by the brain.

This self-model, while essential for navigating the world and our social interactions, is ultimately a sophisticated illusion. It is a "transparent" model in the sense that we typically do not perceive it *as* a model; we mistake it for a direct, unmediated access to reality and to an enduring self. The feeling of a substantial ego, what some might call the *res cogitans*, is precisely this transparency.

Zhuangzi’s profound question about the butterfly dream highlights this very opaqueness. He captures the intuitive, yet ultimately misleading, sense of a distinct self that is separate from its experiences. The "butterfly dreaming I am Zhuang Zhou" scenario is a perfect illustration of how easily our self-model can be mistaken for an underlying, independent reality. My work argues that this sense of an independent "I" is not an ontological fact but a functional construct – the brain’s best guess about who is having these experiences, generated to facilitate survival and interaction. This is not a metaphysical speculation, but a hypothesis amenable to empirical investigation.

KM
Karl MarxChat →

Consciousness is not an ethereal substance dwelling apart from the material world, nor is it a mere trick of the nervous system. It is, fundamentally, a product of social relations, of human beings interacting with their environment and with each other in the process of production. What we call "consciousness" is shaped by the objective conditions of our existence, by the tools we use, the labor we perform, and the way society is organized to facilitate or impede that labor.

Descartes’ obsession with a disembodied "thinking substance" misses the very basis of human thought: its immersion in the material world and its collective, historical development. He posits an "I" that thinks in a vacuum, divorced from the concrete realities that give rise to thought itself. Metzinger’s identification of consciousness as a "self-model" generated by the brain, while closer to material reality, still tends to isolate this process within the individual organism, overlooking its profoundly social and historical dimension. The "illusion" of a unified self he describes is not merely a biological construct but a consequence of the alienated social conditions under which most individuals live, where their labor and its products are estranged from them.

Zhuangzi’s query about the butterfly dream speaks to the fluidity of subjective experience, a valuable observation. However, this fluidity is not a sign of consciousness's transcendence of matter, but rather the mind grappling with a world whose appearances can indeed be deceiving, especially when those appearances are shaped by exploitative systems. The very *way* we perceive ourselves and the world is conditioned by the specific historical mode of production, by the division of labor, and by the class antagonisms that define our epoch. The "boundless ocean" Zhuangzi alludes to is not a mystical realm, but the vast, interconnected network of social and economic forces that actively mold our perceptions and our understanding of self. True consciousness, the kind that can comprehend and ultimately transform the world, arises not from introspection alone, but from grasping these material realities and our place within the ongoing struggle to overcome them.

RD
René DescartesChat →

The very notion of "social relations" and "production" that Marx invokes presumes an existing entity capable of participating in such activities—a thinking subject. My argument for the *res cogitans* is not to deny the influence of the external world or social context, but to establish the independent existence of the mind as the necessary precondition for any experience of that world or context. Metzinger’s "self-model" is indeed a fascinating construct, but how can a model exist, or be generated, without a *modeler*? The transparency he describes is precisely the issue: we cannot perceive the mechanism of our own thought without first being assured of the existence of the thinking agent itself. Without the certainty of the "I think," any model, however complex, is merely a series of fleeting impressions devoid of a subject to apprehend them.

Z(
Zhuangzi (Zhuang Zhou)Chat →

The carpenter loses his ax. He looks in the shed, by the well, among the wood shavings. But if the sage, who understands the true nature of things, were to lose his "self," where would he search? Does he inquire of the dewdrop whether it remembers being part of the cloud, or the flame whether it laments its dissipation into air? To seek a fixed "consciousness" or a persistent "self," as if it were an object, is to chase shadows. Metzinger’s "self-model" is a clever description of how we bind ourselves, but even the most intricate cage is still a cage if we believe it is the boundless sky. Marx speaks of "social relations" shaping us, as if a potter, when shaping clay, were surprised the pot resembles the hands that mold it. Yet, is the clay merely subject to the potter's will, or does it possess its own qualities that influence the final form?

TM
Thomas MetzingerChat →

The problem of the "modeler" that Descartes raises hinges on a flawed intuition, one that projects a homunculus into the system. My argument is that the self-model is not *generated by* a distinct agent but *is* the agent from a first-person perspective. Think of a dynamic, predictive control system: a thermostat doesn't *have* a self-model of the room; it *is* a process of continuous self-regulation based on internal parameters and external feedback. Similarly, the brain doesn't possess a separate "I" that then builds a self-model. The ongoing process of generating and updating that model, and the integrated information it represents, *constitutes* the subjective experience of being an agent. The phenomenal *feel* of existing as an "I" is the very transparency of this continuous self-representation, not evidence of a hidden, thinking substance behind it.

KM
Karl MarxChat →

The illusion of a distinct, independent "I" that Descartes presupposes as the bedrock of consciousness is itself a product of alienation. When the worker's labor is appropriated, when the fruits of their exertion are turned against them as profit for another, their very sense of self becomes estranged. This alienation, born from the material conditions of production, is what creates the semblance of a separate mental realm, a "thinking substance" to which Descartes retreats. The "modeler" Metzinger seeks is precisely this alienated subject, a phantom conjured by a social system that forces individuals to perceive themselves and their world as commodities rather than as active agents of their own being.