One of the more persistent claims made by creationists, especially those who have learned that “irreducible complexity” and “no transitional fossils” are not arguments so much as slogans, is that science can never explain consciousness. Consciousness, we are assured, is something special, something non-material, something breathed into us by a creator god; the magical ingredient that separates humans from the rest of the animal kingdom and places us conveniently at the centre of creation.
It is, of course, another argument from ignorance: science has not yet explained every detail of consciousness, therefore God. The same argument was once used for lightning, disease, embryology, instinct, inheritance, morality and the origin of species. In each case, the alleged supernatural mystery retreated as evidence accumulated and natural mechanisms were discovered. Consciousness is now going the same way — not because science has solved every philosophical puzzle about subjective experience, but because neuroscience is steadily showing that the mental processes creationists like to wrap in mystery are ordinary biological processes carried out by ordinary neural tissue.
A striking example of that comes from a paper published in Nature by researchers at Baylor College of Medicine and collaborating institutions. The researchers recorded activity from neurons in the human hippocampus while patients were under general anaesthesia during surgery for drug-resistant epilepsy. This gave them a rare opportunity to observe what the brain was doing when the patients were, in the ordinary sense, unconscious.
What they found is deeply inconvenient for anyone who wants consciousness to remain a supernatural mystery. Even under anaesthesia, hippocampal neurons responded to unexpected sounds, showed evidence of short-term plasticity, and, most remarkably, processed spoken language. When patients were played short stories, neural activity in the hippocampus carried information about word frequency, semantic category and grammatical class, and even contained signals predictive of upcoming words.
In other words, processes we might once have assumed belonged to conscious awareness — distinguishing parts of speech, extracting meaning and anticipating what comes next in a sentence — were taking place without the patient being aware of them. The brain was not merely ticking over like an idling machine; it was analysing, categorising and predicting. Consciousness, then, is not where all the clever work is done. Much of the clever work appears to be done before consciousness ever gets involved.
That does not mean this paper has “solved” consciousness, nor do the authors claim that it has. What it does show is that the boundary between conscious and unconscious processing is not where many people intuitively imagine it to be. Consciousness is looking less like a magic light switched on by a soul, and more like a higher-level state arising from coordinated activity across brain systems — a state in which some of the brain’s processing becomes integrated, reportable and available to the organism as experience.
For creationists, that is the problem. Their argument depends on consciousness remaining mysterious enough to hide a god in it. But neuroscience keeps doing what science always does: replacing mystery with mechanism, awe with understanding, and supernatural assertion with testable evidence. Once again, the choice is not between “science knows everything” and “therefore God”; it is between a research programme that discovers how things work and a religious apologetic that depends on hoping we never find out.
What Do We Mean by Consciousness? One reason this research matters is that it helps to separate several ideas that are often treated as though they were the same thing. In everyday speech, terms such as brain activity, thought, awareness and consciousness are often blurred together, but neuroscience shows that they are not identical.The paper in Nature was accompanied by a Baylor College of Medicine news release:
Unconscious Processing
Much of what the brain does happens without our being aware of it. This is called unconscious processing. It includes the automatic handling of sensory input, pattern recognition, emotional responses, memory formation, language parsing and prediction. In other words, the brain can do a great deal of work before any part of it enters conscious awareness.
Cognition
Cognition refers to the mental processes by which the brain handles information. These include recognising patterns, categorising objects, recalling memories, understanding speech, making predictions and planning responses. Importantly, cognition does not always require consciousness. A person can process information cognitively without being aware of doing so.
Awareness
Awareness is the point at which some part of that processing becomes available to the person as experience. We become aware of a sound, a thought, a memory or a feeling only after the brain has already done much of the underlying work.
Consciousness
Consciousness is usually understood as the overall state in which we have subjective experience and can report what we are sensing, thinking or feeling. Rather than being a separate “thing” added to the brain from outside, consciousness increasingly looks like a high-level state that emerges when information processed by different brain systems becomes integrated and available to the organism as experience.
The Brain’s Hidden Work
Everyday life contains many examples of this hidden mental activity:
Why This Matters
- We recognise the sound of speech before we consciously grasp its meaning.
- We often predict the end of a familiar sentence before it is spoken.
- We spot a face in a crowd almost instantly, without knowing how we did it.
- We walk, balance and coordinate movement without consciously calculating each muscle action.
- We may have an emotional reaction to a situation before we can explain why.
- We sometimes correct grammar or notice that a sentence “sounds wrong” automatically.
Research such as this shows that complex language-related processing can continue even when a person is unconscious under anaesthesia. That means sophisticated mental activity does not depend on a mysterious immaterial “mind” directing the brain from outside. Instead, it supports the scientific view that what we call consciousness is rooted in neurophysiology and emerges from the coordinated activity of the brain itself.
Researchers discover advanced language processing in the unconscious human brain
Baylor College of Medicine researchers have found that the human brain is capable of sophisticated language processing while in an unconscious state from general anesthesia. The findings, published in the latest edition of Nature, challenge what we know about the role of consciousness and cognition, and could open new ways of understanding memory, language and brain-computer interfaces.
Our findings show that the brain is far more active and capable during unconsciousness than previously thought. Even when patients are fully anesthetized, their brains continue to analyze the world around them.
Professor Dr. Sameer A. Sheth, corresponding author.
Department of Neurosurgery
Baylor College of Medicine
Houston, TX, USA.
Sheth, who is also a neurosurgeon at Baylor St. Luke’s Medical Center, and his collaborators first recorded neural activity from hundreds of individual neurons in the hippocampus, a part of the brain associated with memory, while patients were under general anesthesia during epilepsy surgery. Patients undergoing this type of surgery were sought after because it allowed researchers access to this particular part of the brain.
Using Neuropixels probes, a technology which had not been used in this part of the brain before, the team collected data on how the brain processed sound and language without conscious awareness.
The study began with patients exposed to repetitive tones interrupted by an occasional different sound. Researchers found that hippocampal neurons could distinguish these unusual tones and that this ability improved over time, suggesting a form of learning or neural plasticity during anesthesia.
Researchers then moved on to conduct a more complex experiment where they played short stories to patients while recording neural responses. Surprisingly, the hippocampus demonstrated real-time processing of language. Neural activity showed the brain’s ability to differentiate parts of speech, such as nouns, verbs and adjectives, based on patterns of neuron firing.
Even more surprising, researchers found that neural signals could predict upcoming words in a sentence.
The brain appears to anticipate what comes next in a story, even without conscious awareness.
Professor Dr. Sameer A. Sheth.
[Professor Seth] is also Director of The Gordon and Mary Cain Pediatric Neurology Research Foundation Laboratories within the Duncan Neurological Research Institute at Texas Children’s Hospital.
This kind of predictive coding is something we associate with being awake and attentive, yet it’s happening here in an unconscious state.
Professor Dr. Benjamin Y. Hayden, co-senior author.
Department of Neurosurgery
Baylor College of Medicine
Houston, TX, USA.
These discoveries suggest that cognitive functions such as language comprehension and prediction do not require consciousness. Instead, consciousness may depend on broader coordination across brain regions rather than activity within a single structure like the hippocampus.
This activity also mirrors the predictive behavior seen in artificial intelligence (AI). The brain’s ability to predict upcoming words is similar to how large language models generate text. These findings help researchers understand how biological and artificial systems process information. This could be a step towards the development and refinement of new technologies for communication, such as speech prosthetics for individuals who are unable to speak.
Can we use these signals to deploy and run a speech prosthetic for some of the parts of the brain that are damaged by stroke or injury? These are questions that we can now consider in relation to this part of the brain.
Dr. Kalman A. (Vigi) Katlowitz, first author.
Department of Neurosurgery
Baylor College of Medicine
Houston, TX, USA.
However, more research is needed. The findings are specific to one type of anesthesia and may not apply to other unconscious states such as sleep or coma. This study only looked at one brain region as well, and it is unknown how widespread these processes are across different regions of the brain.This work pushes us to rethink what it means to be conscious. The brain is doing much more behind the scenes than we fully understand.
Professor Dr. Sameer A. Sheth.
Others who contributed to the study include: Eric R. Cole, Elizabeth A. Mickiewicz, Shraddha Shah, Melissa Franch, Joshua A. Adkinson, James L. Belanger, Raissa K. Mathura, Domokos Meszéna, Matthew McGinley, William Muñoz, Garrett P. Banks, Sydney S. Cash, Chih-Wei Hsu, Angelique C. Paulk, Nicole R. Provenza, Andrew J. Watrous, Ziv Williams, Alica M. Goldman, Vaishnav Krishnan, Atul Maheshwari, Sarah R. Heilbronner, Robert Kim and Nuttida Rungratsameetaweemana. See a list of affiliations in the publication.
Publication:
Once again, the creationist argument depends not on evidence, but on a shrinking area of ignorance. Consciousness is not being explained by invoking magic, souls or divine breath, but by studying what brains actually do. And what brains actually do, even when the person is unconscious, is far more sophisticated than our intuitions might suggest.
This research does not claim to have solved every philosophical question about subjective experience, nor does it need to. Its importance lies in showing that complex mental operations — including language processing, categorisation and prediction — can occur without conscious awareness. That leaves less and less room for the claim that consciousness is some supernatural faculty placed into the body from outside.
The creationist mistake, as always, is to confuse “not yet fully explained” with “therefore God”. But science does not require complete knowledge before it can make progress. It advances by breaking large mysteries into smaller, testable questions, then answering them with evidence. This paper is another example of that process: not a declaration that neuroscience knows everything, but a demonstration that consciousness belongs firmly within the domain of biology.
And that is what makes this so damaging to creationist apologetics. The more we learn about the brain, the less plausible it becomes to treat consciousness as an inexplicable miracle. What we call the conscious mind appears not to be a ghostly passenger in the machinery, but an emergent state of the machinery itself — a natural product of neural systems processing, integrating and making available the information that enables an organism to experience and respond to the world.
The corollary is that humans are almost certainly not the only species in which consciousness has evolved.
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