Consciousness requires no new physics, Overcoming Bias analysis argues

The nature of consciousness does not require the invention of new physical laws to be understood. In an analysis published on the blog Overcoming Bias, the author argues for a strictly reductionist framework where the systems responsible for experience are composed of brain systems, which are themselves composed of physical world systems.

According to the author, if the physics governing the brain is complete, then any observable patterns in subjective experience must be accounted for by corresponding patterns in physics. This perspective posits that consciousness is not a separate entity or a mystical addition to the universe, but a direct result of physical processes already described by science.

The Challenge of the 'Zombie'

Despite this reductionist stance, the author identifies two primary theoretical exceptions that complicate the argument: the distinction between 'actual' and 'possible' worlds, and the 'zombie' problem. The latter involves the theoretical existence of systems that could perfectly mimic the behavior and physical state of a feeling being without actually experiencing any internal sensations.

This philosophical hurdle suggests that a system could be physically identical to a human but remain entirely devoid of consciousness. Because no amount of physical data can distinguish a truly feeling system from such a 'zombie,' the author argues that empirical observation alone cannot solve the problem of consciousness.

The Role of Priors

Since physical data cannot provide a definitive answer, the author concludes that one must rely on 'priors'—pre-existing theoretical assumptions—to determine which systems are conscious. In this context, the author suggests that panpsychism, the view that consciousness is a fundamental feature of all matter, serves as the simplest local rule for determining which systems possess the capacity to feel.

Implications for the Field

This approach shifts the debate from a search for a 'consciousness particle' or a new law of nature toward a refinement of how we apply existing physics to biological systems. By framing consciousness as a matter of physical patterns rather than a new physical force, the argument aligns the study of the mind more closely with traditional neuroscience and physics.

Future Outlook

What remains to be seen is whether this reductionist model can provide a predictive framework that satisfies those who believe the 'hard problem' of consciousness requires a non-physical explanation. For now, the author maintains that the simplest path forward is to assume that the physics we already know is sufficient to explain the experience of being alive.