Marvin Edwards
Veteran Member
I think the key here is that Harris is forced to admit that it is in fact our own brain that is making the decision. And the decision is not too "deep" to rise to conscious awareness. For a complex decision, like buying a new car, or deciding where to vacation, a person may even take out a pencil and paper to make a list of pros and cons, or the costs and benefits. And there it is, the process of deciding, right there in the open for all to see.
Of course it's the brain that makes decisions. Nobody is forced to admit it. It's not only not a problem, but a key point in the argument against free will - that it's the unconscious of the brain that acquires, processes and represents [some] information in conscious form....that there is no choice in that process: the brain does what it does according to evolutionary role: information in, output out.
Electrical stimulation and the illusion of free will:
''When it comes to the human brain, even the simplest of acts can be counter-intuitive and deceptively complicated. For example, try stretching your arm.
Nerves in the limb send messages back to your brain, but the subjective experience you have of stretching isn't due to these signals. The feeling that you willed your arm into motion, and the realisation that you moved it at all, are both the result of an area at the back of your brain called the posterior parietal cortex. This region helped to produce the intention to move, and predicted what the movement would feel like, all before you twitched a single muscle.
Michel Desmurget and a team of French neuroscientists arrived at this conclusion by stimulating the brains of seven people with electrodes, while they underwent brain surgery under local anaesthetic. When Desmurget stimulated the parietal cortex, the patients felt a strong desire to move their arms, hands, feet or lips, although they never actually did. Stronger currents cast a powerful illusion, convincing the patients that they had actually moved, even though recordings of electrical activity in their muscles said otherwise.
But when Desmurget stimulated a different region - the premotor cortex - he found the opposite effect. The patients moved their hands, arms or mouths without realising it. One of them flexed his left wrist, fingers and elbow and rotated his forearm, but was completely unaware of it. When his surgeons asked if he felt anything, he said no. Higher currents evoked stronger movements, but still the patients remained blissfully unaware that their limbs and lips were budging.''
During brain surgery, they will monitor specific functions to make sure they don't unintentionally damage any working functions. Neuroscience continues to try to map specific functions to specific areas in the brain, to discover how the brain works. I remember from David Eagleman's "The Brain" series on PBS a woman who could not make decisions in the grocery store, because the ability to simply "feel" that her decision was right was damaged. And I think I read somewhere else that this feeling could be triggered by transcranial magnetic stimulation of a specific area.
Neuroscience will eventually be able to explain how the brain goes about making decisions. But the reductionist should never presume that by explaining how something works that they have somehow "explained it away".
Choosing will remain a real function of the brain even after we know all the neurological ins and outs of the process. Choosing doesn't disappear when it is fully explained.
And free will, will continue to be just what it is. Free will is when a person decides for themselves what they will do while free of coercion and other forms of undue influence. How this happens inside the brain is nice to know. And it is medically significant for the diagnosis of specific injuries that impair the process. But it does not change the fact that people make decisions that causally determine what they will do.
The brain is not an external control. The brain is us. And what the brain decides, through whatever means, whatever combination of conscious or unconscious processes, what the brain has decided we have decided.
Had we not decided to buy that car, we would not have that car. But there it sits in the driveway. And the dealership presented us with the bill, holding us responsible for our deliberate action, our freely chosen "I will have the red Prius".
Now, had our neurosurgeons manipulated our brains into making that choice, then that would have been an extraordinary (undue) influence, and we would expect them to pay for the purchase.