In contemporary debates on free will, skeptics and materialists frequently point to modern neuroscience, arguing that because subconscious neural activity precedes our conscious awareness of decisions, choice is nothing more than an illusion. But does the science actually support hard determinism, or are materialists misinterpreting the evidence?
When examined closely - particularly through landmark research like Benjamin Libet’s experiments—the data reveals a profound truth: the physical delay between brain activity and conscious awareness doesn't refute free will at all. In fact, it is precisely what we should expect under a Christian, dualist-interactionist understanding of the human soul.
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The Illusion of the Present
Ask yourself a simple question: How many live sporting events have you ever truly watched?
Surprisingly, the answer for all of us is zero.
Even if you are sitting directly on the fifty-yard line, there is a finite physical delay—measured in milliseconds—for the light reflecting off the players to reach your retinas and be processed by your visual cortex. While the experience feels instantaneous, you are always perceiving an event that has already occurred in the immediate past.
Materialists and determinists often point to a similar phenomenon in neuroscience to claim that free will is an illusion. They argue that we do not consciously pick or choose what we accept, dismiss, or do; rather, our choices are merely the deterministic output of subconscious neural machinery. To support this claim, skeptics frequently turn to the landmark research of neurophysiologist Benjamin Libet.
Inside Libet’s Experiments
In his foundational studies, Libet asked participants to perform a simple motor task: press a button with a finger whenever they felt the urge to do so, all while monitoring their electrical brain activity via EEG.
The timeline of the results seemed startling on the surface:
The Brain Signal: A burst of electrical activity—termed the readiness potential—fired in the motor cortex approximately 550 milliseconds before the finger moved.
Conscious Awareness: The participant reported becoming consciously aware of their intention to move about 200 milliseconds prior to the movement.
The Action: The participant's finger pressed the button.
At first glance, materialists claimed victory. If brain signals fire roughly 350 milliseconds before a person consciously registers the intent to act, doesn't that prove the physical brain made the choice before the conscious mind was even aware of it?
The Dualist Perspective: Hardware and Mind
The answer is no - and in fact, Libet’s findings are precisely what we should expect under a Christian dualist-interactionist framework.
In dualism, the soul (or immaterial mind) is not divorced from physical reality; rather, the mind utilizes the physical brain as an organic instrument to interact with the world. Because neural signals travel through biological tissue at finite speeds, there must inevitably be a brief temporal lag between the mind's volition and the brain's conscious registration of that state.
Just as you cannot see the present because of the finite velocity of light, you cannot experience conscious awareness of a neural event without the time required for the signal to travel across synapses. For a responsible agent to make a free decision, the soul only requires awareness of the relevant facts before initiating the choice - not a physiologically impossible, zero-millisecond synchronization across biological matter.
The Veto Power: Free Won't
Furthermore, a critical follow-up in Libet’s research is frequently ignored by materialist critics.
In subsequent trials, Libet discovered that even after the readiness potential fired and the subject became consciously aware of the impulse to act, they still retained the conscious ability to veto the action. Subjects could deliberately choose to abort the movement within that final 200-millisecond window.
The initial brain signal does not dictate an inevitable outcome; it represents a physiological readiness to act which the conscious agent can freely endorse or cancel. Far from undermining agency, the empirical evidence demonstrates that human beings possess genuine top-down executive control over their physical impulses.
The materialist argument relies on a fundamental category mistake: treating the brain as the originator of thought rather than the instrument through which the immaterial mind operates in a physical world.
Finite Speed, Conscious Control: Just as there is a brief physical delay between light leaving a sporting event and reaching your retinas, neural transmission through biological tissue takes time. A lag between the soul’s volition and conscious physical awareness is an inevitability of biological hardware - not evidence of causal determinism.
The Power to Veto: Libet’s own findings demonstrated that individuals retain conscious "veto power" over incoming neural impulses, proving that we are not helpless observers bound to involuntary biochemical directives.
Far from burying moral responsibility and personal agency, neuroscience demonstrates that the soul uses the physical brain to navigate reality. When God calls us to choose life, truth, and faith, the command is real - and the choice remains entirely ours.
