Are We More Than Biological Machines?

Are We More Than Biological Machines?

Are we just fleshy automatons? From an empirical view, we breathe, digest, grow and die on autopilot. But it feels like there's something a bit special about being human, no?

It was once thought that life could not be reduced to a nuts-and-bolts explanation by science. Yet that's exactly what happened—scientists ditched the notion of a mystery life force when it became clear that our existence arises from biological, physical and chemical origins.

Now, the same revolution is occurring with the science of consciousness.

While most people—theists, atheists, and agnostics alike—still believe in an ethereal mind or spirit, neuroscientists are gathering increasing amounts of evidence for consciousness as a physical property of the brain.

Perhaps consciousness arises when the brain's simulation of the world becomes so complex that it must include a model of itself.

Richard Dawkins, The Selfish Gene

This self awareness is what creates the confusion. It makes it harder to intuit the conclusion of empirical evidence: that our bodies actually run on autopilot. Self awareness steps in the way, if only perceptually, of our so-called free will decision making, problem solving, and personalities.

The Frontal Cortex

It can help to examine the functions of the frontal cortex. This is the biggest and most recently evolved part of the brain. It allows us to selectively focus our awareness and attention.

So while many automatic biological functions are taking place in other parts of the brain, conscious decision making takes part in the frontal cortex which generates a perception of freedom and independence. It suggests free will.

The Human Brain

In the animal kingdom, humans have evolved the biggest frontal cortex, giving us the broadest range of high functioning abilities. This not only suggests animals with a larger cortex have a greater capacity for conscious awareness, but that this kind of consciousness emerged gradually, following a continuum within animal evolution.

In other words, there was no single point at which our ancestors evolved higher forms of consciousness, the same way night doesn't turn to day in an instant. It was a gradual process.

Pursuing this line of enquiry, perhaps simple life began by following rules of molecular cause and effect, but evolution gifted complex life with the capacity for conscious free thinking. This is the most rational approach we can take to the development of actual free will.

But can science support this hypothesis?

Now the question lies in the nature of consciousness. Does it really outrank our biology, allowing us to control elements of our experience in meaningful ways which aren't predictable given our biological needs? Is consciousness the supplier of free will?

Consciousness Explained

Neuroscientists look at human consciousness in two ways:

  1. Automatic arousal arises in the brain stem. Sleep-wake cycles, cardiac and respiratory rates are examples of passive, automatic systems.
  2. Deliberate awareness arises in the frontal cortex. Memory retrieval, problem solving and decision making are examples of active, deliberate systems.

During anaesthesia, both forms of consciousness shut down.

Indeed, propofol, a common general anaesthetic, was this year discovered to disrupt presynaptic mechanisms, stalling chatter between neurons across the entire brain.

This is why waking from anaesthesia feels so different from waking from a big sleep. In many respects you are dead to the world. Time has no meaning. Consciousness is gone.

So the first piece of evidence we have against a spiritual or ethereal mind is that it relies on the brain to function.

This is important. To be conscious, you need a physical brain.

Problem Solving is Procedural

Now let's do an experiment involving a key part of consciousness: problem solving.

Our ability to problem-solve depends on many factors like genetics, brain structure, experience, training, intelligence and age. All of these variables are all measurable and therefore predictable.

So in this example, problem solving can be shown to be a pre-determined calculation based on your biology and experiences.

Find the next number in this sequence.

Number Puzzle Part 1

Most of us are exposed to this type of maths problem in school. A common solution is to systematically work through the numerical relationships and seek the pattern between those.

Number Puzzle Part 2

This doesn't seem to help us figure out the next number. So we try a different method.

Number Puzzle Part 3

Problem solved. You used active conscious awareness to reach this conclusion. But you also used your knowledge of numbers and multiplication and systematic problem solving.

These skills were handed to you through past experiences; the ability to problem solve was programmed into your brain over time.

It's a direct result of cause and effect. A series of biological executions. A fine example of determinism within our conscious brain processes.

So are we more than biological machines? In this example, no. You're simply a human calculator.

And the fact is, we can apply the same logical principle to explain many key parts of consciousness: concentration, judgement, inhibition, personality, language, and motor skills.

Where is Consciousness in The Brain?

Another way to tackle the consciousness problem is to study it in action—or inaction. This observational study on consciousness at UCLA used fMRI scans of 12 healthy brains to conclude:

"When we lose consciousness, the communication among areas of the brain becomes extremely inefficient, as if suddenly each area of the brain became very distant from every other, making it difficult for information to travel from one place to another."

Monti et al., UCLA

The findings suggest that consciousness isn't a single point in the brain. It's more like how the brain "talks" to itself. Which is extremely useful when your "self" is scattered among billions of neurons and you're trying to pool that resource into something useful.

If the billions of neurons in your brain are like all the websites in the world, then your consciousness is simply the internet protocol that connects them.

The connecting technology doesn't produce or direct the content of websites. But it does allow the user to skip between many different sources of information to reach a larger conclusion.

Here, the blue clouds are your automatic thoughts and ideas. This is not consciousness. These are memories and ideas triggered by past experiences.

Neural Network in The Human Brain

Instead, consciousness is represented by the lines joining these thought-clouds. It's a network of interconnectivity, like a spaghetti junction, which simply facilitates movement of vehicles so they can reach a destination.

This is the essence of Passive Frame Theory, which states that consciousness is like an interpreter connecting up many tiny pockets of brain activity. However, also like an interpreter, consciousness merely presents existing ideas. It does not create its own.

In this light, consciousness is merely a middle-man of automatic thought processes. It is no more separate from the physical brain than the flow of water is separate from a river. And, being physical, it falls under the remit of determinism—of fundamental cause and effect.

Free Will vs Biological Machines

Many people believe that free will gives us mental independence from our biological machinery. The notion that you're eligible to make personal choices and take ownership of your life impacts everything from the mundane to the sublime.

Buddhist philosophers have countered this hypothesis for millennia. They say there is no self, and free will is an illusion. Now scientific evidence is mounting to support the idea that free will is indeed a trick of the mind.

Two decades ago, the psychologists Wegner and Wheatley proposed that our sense of free will is a rapid-firing afterthought that justifies why we make certain decisions. But this feeling or justification has no causal role in our decision making.

What will you eat for your next meal? Is it a free choice, or is it a deterministic decision-making process based on many pre-determined factors?

Consider the availability of food, cultural influences, nutritional requirements, cravings, and taste preferences based on the genetically and experientially programmed intricacies of your taste buds.

Is free will an additional factor, uninfluenced by these deterministic causes? If such a thing exists, no-one has yet identified where it comes from and how it works.

How do you choose your next partner?

This is driven by factors like the availability of mates, society and culture, biological attractiveness, personality type (shaped by the nature of your genetics and the nurture of your parents), biological pheromone cues, and sexuality (thought to be pre-programmed by epigenetics in the womb).

Is there any room for free will as an additional factor?

In any part of the human experience, can free will be relied upon to overcome our animalistic urges and our innate psychological need to seek pleasure and avoid pain?

What does your will desire that isn't already explained by your pre-determined psychology and biology?

The Deterministic Solution

Determinism claims that the entire universe is a predictable, mechanical unfolding of events.

Atoms were born behaving to consistent physical laws, which accumulated to create complex life. Then humans came along and began playing the game as if we ourselves created it, assuming impossible command over outcomes beyond our control.

Determinism is explored in Isaac Asmiov's Foundation series, where a mathematician predicts the future based on deterministic law. The series was a favourite of Elon Musk when he was a teenager, and prompted him to dedicate his grown-up life to helping humanity.

The existence of free will isn't only explored in philosophical debate. It has a history in experimental science too.

Neuroscientists and psychologists have sought empirical evidence for free will for decades. We have nothing yet. Instead, we find physical brain processes and psychological treatments capable of creating the illusion in its entirety.

Of course, absence of evidence does not equate to evidence of absence. I can't prove a negative, such as "free will does not exist". Just like I can't prove there isn't a chocolate teapot orbiting the Earth. I can look for it, and come up empty. But that experiment doesn't definitively prove it's not there.

But science is rational, seeking the simplest and most likely solutions to our questions about the universe. It demands a proof-positive approach. Which means the burden of proof must fall on those making the claim that "free will does exist".

Without the proof, the claim lays fundamentally vulnerable to doubt—and the rational response is scepticism.

You can't believe in my delicious orbiting teapot. What if I just made it up because I think it sounds nice?

Acceptance as A Biological Machine

If there's no evidence for free will, why do people defend it so aggressively?

There are many reasons, illustrated in the book Free Will by Sam Harris.

He explains that free will touches almost everything that human beings value. We can't think clearly about law, politics, religion, public policy, relationships, and morality without first imagining that every person is the true source of their own thoughts and actions.

Without free will, the traditional rules of society break down. That's a tough pill to swallow. We simply don't know how to deal with the destruction of our fundamental world view.

And so it goes. The free will debate flies in the face of the scientific principle of determinism, yet even rational people put it in the unknowable-for-now box without really examining the evidence against it.

We often feel safer to stick with the gut feeling that free will exists, even though it belongs in the same box as optical illusions. Stories that our brains tell us to make sense of reality.

This is a dangerous idea. The evidence suggests we are biological machines by nature, who create explanatory patterns and narratives to feed our psychological need for control.

These are all traits brought about by the frontal cortex. But how can we understand our own motivations and needs when every decision is justified by a retrospective, goal-oriented narrative? Aren't we just lying to ourselves?

Harris suggests that ditching the illusion of free will would force massive societal reforms, as well as enabling us to become more lucid philosophers.

It helps resolve feelings of hatred and revenge towards others, who simply aren't responsible for their choices, but pre-programmed automatons acting out their code.

Yet it still allows us to make rational decisions around criminal prosecution. For instance, we still need to identify and isolate the serial killer for the sake of our community.

To paraphrase Harris, you don't hate a hurricane. But you can still fear it and take measures to protect yourself from it. We can do the same with harmful members of society, all the while empathising with their pain and turmoil.

So perhaps the death of free will can be liberating. All the while, it provides a path to enlightenment by shedding other limiting misconceptions, such as the existence of the self.

This strange new philosophy leaves us with the uncomfortable idea that we are indeed just biological machines. But from a brave perspective, it could be the exciting jumping-off point for our next evolution in awareness.

Are you raging in disagreement?

...Just where does that come from?

Becky Casale Bio

ABOUT THE AUTHOR: Becky Casale is a science freak and a writer who pooped out Science Me. She is studying for a BSc and writing her first sci-fi novel.