Metaphysics of Consciousness:
Dualism versus Physicalism

Consciousness is one of the most mysterious aspects of human existence. The question of its nature has puzzled philosophers, scientists, and theologians for centuries. What makes us conscious beings? Is consciousness something separate from the physical body, or can it be explained solely by the laws of nature? These questions lie at the heart of the philosophical debate between dualism and physicalism.

Dualism suggests that the mind and body exist as two different types of entities, while physicalism claims that everything, including consciousness, obeys physical laws. Each of these views has its own arguments, observations, and premises. Let’s take a closer look.

Dualism: Mind as an Independent Substance

The philosophical position of dualism has its roots in Descartes, who argued that there are two types of substances: thinking (res cogitans) and extended (res extensa). According to dualism, the mind and body are related but not reducible to each other.

Descartes wondered how a physical body, bound by the laws of nature, could give rise to an immaterial consciousness. His answer was that the mind exists independently of the body, and that the two interact via a mysterious “pineal gland.” Modern dualists are less literal, but the gist of the idea remains: consciousness cannot be fully explained by physics and chemistry.

Critics of dualism, however, often point to the problem of interaction. How can something immaterial influence something material? Even if the mind exists separately, it is extremely difficult to explain its influence on the body.

Physicalism: Consciousness as a product of the brain

The opposite camp, the physicalists, argue that consciousness is nothing more than a complex set of neural processes. According to this view, if we could fully understand the workings of the brain, the mystery of consciousness would disappear. This view is supported by advances in neuroscience, which has already shown that emotional and cognitive states are directly related to brain activity.

Physicalism has several variations, from a strict reductionism that claims that consciousness is reducible to biochemical processes to softer forms that allow that consciousness may be a “computational” process based on the workings of the nervous system. However, physicalism faces what David Chalmers called the “hard problem of consciousness”: why is neural activity accompanied by subjective experience?

The Hard Problem of Consciousness

Regardless of one’s philosophical position, almost everyone agrees that the subjectivity of consciousness — its "qualia" — is an exceptional phenomenon. Why does a person feel pain rather than simply react to external stimuli like an automaton? How are sensations of taste, color, or sound related to the brain’s electrophysiological activity? These questions remain a mystery.

Physicalists propose the hypothesis that subjective experience is an epiphenomenon, a by-product of the brain’s work. Dualists see this as evidence of the existence of something non-physical.

Experiments that question everything

Science does not stand still. Experiments in neurobiology and psychology have provided much food for thought. For example, studies of the phenomenon of "ghosts" (phantom limb) show that consciousness can continue to perceive non-existent limbs. This calls into question strict physicalism, although it does not confirm dualism.

Another example is experiments with psychedelics. They indicate that changes in brain chemistry can radically transform subjective experience, but they do not provide a definitive answer to the question of the nature of consciousness.

Modern attempts at integration

Some philosophers and scientists propose hybrid approaches. Integrated Information Theory (IIT), proposed by Giulio Tononi, views consciousness as the result of complex systems of interactions, which allows us to combine aspects of both philosophies.

Another example is panpsychism, which suggests that consciousness is inherent to all particles of matter to some degree. This is a controversial but intriguing direction.

Understanding the nature of consciousness is not only philosophically satisfying, but also has practical significance. It affects our attitudes toward artificial intelligence, ethics, and medical interventions in the brain. The answer to the question of what consciousness is can change our understanding of ourselves.

Dualism and physicalism continue to debate, providing us with rich ground for reflection. Perhaps the truth lies beyond these two extremes. However, as long as the question remains open, consciousness continues to amaze us with its mystery.