Is consciousness merely "brain illusions" as some scientists claim?

The term "illusion" itself reveals a conceptual contradiction. How can consciousness be an "illusion" when an illusion itself requires a consciousness to experience it? This question places us before one of the most complex contemporary philosophical puzzles: what is the nature of our conscious experience? And can it be reduced to mere neural activity?

The question is not a philosophical luxury. It has practical implications: are we merely complex biological machines? Do our subjective experiences—pain, joy, love—have real existence or are they merely "tricks" created by the brain? And if consciousness is an illusion, who is experiencing this illusion?

Inadequate Responses to Avoid

From some believers:

"Consciousness is proof of the soul, and that suffices." This quick leap does not solve the problem. Even if we believe in the soul, the question remains: how does the soul interact with the material brain? And how do we explain consciousness's close connection to brain states (medications, injuries, sleep)? Faith in the soul does not eliminate the necessity of understanding the mechanisms of consciousness.

"Science cannot study consciousness because it is immaterial." An unjustified restriction of science. Science studies many phenomena that are not directly material (gravity, electromagnetic fields, information). The question is not "Can science study consciousness?" but "What are the limits of what science can discover about consciousness?"

From some materialists:

"Consciousness is merely neural activity, and science has proven this." A hasty claim. Science has proven the close correlation between consciousness and the brain, but correlation does not equal identity. Seeing neural activity accompanying pain does not explain why this activity feels in a certain way. This is the "hard problem" formulated by David Chalmers.

"Consciousness is an evolutionary illusion with no function." A self-contradicting position. If consciousness is a functionless illusion, why did evolution develop it? Evolution does not preserve complex traits without benefit. And if it has a function, then it is not merely an illusion. This position confuses "difficulty of explanation" with "non-existence."

Why These Responses Are Inadequate

All of them avoid dealing with the core of the problem: the subjective experience of consciousness (qualia). When I see the color red, there is "something it is like" to see red—a subjective experience that cannot be reduced to wavelengths or neural activity. This subjective experience is the heart of the problem, and any solution that ignores it is incomplete.

Serious Positions in the Debate

First, "neural reductionism" (Francis Crick, Patricia Churchland). They believe consciousness will be completely explained by understanding brain mechanisms. What we call "consciousness" is merely the brain's way of processing information. With advances in neuroscience, the "mysteries" will disappear completely, just as the mystery of "vital force" disappeared with advances in biology. This is a coherent position, but it faces the challenge of explaining subjective experience.

Second, "property dualism" (David Chalmers). Consciousness is not an illusion, but a fundamental property in the universe like mass and charge. The brain produces consciousness, but consciousness is not merely neural activity. There are natural laws that connect physical states to conscious experiences, but these are laws that cannot be reduced to physics alone. A position that respects both science and subjective experience.

Third, "illusionism" (Daniel Dennett, Keith Frankish). Consciousness is not what we think it is. There is no "inner theater" where we watch our experiences. What we call consciousness is a series of useful illusions created by the brain. But even these thinkers do not deny the existence of "something"—they just reinterpret it radically. The illusion itself needs someone to experience it.

Fourth, "neutral monism" (Bertrand Russell, William James). Matter and consciousness are two sides of one deeper reality. What we call "matter" is the external aspect, and what we call "consciousness" is the internal aspect. Physics studies relations and structures, but it does not tell us about the essential nature of things—and here consciousness comes into play.

Recent Scientific Developments

Three discoveries have changed the debate:

─ Integrated Information Theory (IIT) by Giulio Tononi: An attempt to measure consciousness mathematically. It proposes that consciousness arises from information integration in the system. The greater the integration, the greater the consciousness. A bold but controversial theory.

─ Default Mode Network (DMN): The discovery of a brain network active even at rest, linked to self-awareness. It shows that consciousness is not merely a response to stimuli, but continuous and complex activity.

─ Studies of consciousness in anesthesia and coma: Reveal different levels of consciousness and help understand the relationship between neural activity and conscious experience. But they also confirm the difficulty of measuring consciousness from the outside.

Where We Stand in This Debate Today

Scientific consensus: consciousness is closely linked to the brain, but the nature of this connection is debated. Most serious scientists—even materialists among them—do not describe consciousness as "merely an illusion," but differ in explaining its nature.

The hard problem remains hard. Even with all the progress in neuroscience, we have not come much closer to explaining why neural activity is accompanied by subjective experience. This does not mean the solution is impossible, but it means we may need a conceptual revolution—an entirely new way of thinking.

Consciousness remains an open window to deeper questions: Is the universe merely dead matter? Or does existence have a subjective dimension that physics alone cannot grasp? The question about the nature of consciousness is ultimately a question about the nature of reality itself.

For Advanced Reading

─ Intermediate level: The difference between the easy and hard problems of consciousness
─ Advanced level: Integrated Information Theory and calculating Φ (phi)
─ "The Hard Problem of Consciousness" page on the website
─ David Chalmers, The Conscious Mind (Oxford UP, 1996)