Free Will, Where Does It Come From?

[Ramo]

A good description thought, I mean the capability to compartmentalize brain functions internally. Why shouldn't the mechanism for the aspect of "choice" be physical?

[Ben Kenobi]

He's talking about taking the SAME PERSON, as in EVERY SINGLE PARTICLE is in THE EXACT SAME PLACE. Thus, the memory NEVER EXISTED because you've got a previous "version" of the person.

True, but now you have a different person.

[Kuciwalker]

Originally posted by Park Avenue
Skywalker



I totally agree. Drogue seems to be saying that even if it is probabilistic, given the same circumstances, the same would happen again. This is obviously wrong. If all the future is is a set of probabilities (whereas the past is certainties; hence we know of it), then saying it is predictable and deterministic is not credible.

He's right that it COULD happen, but incorrect in his assertion that it necessarily WOULD

[Kuciwalker]

Originally posted by Park Avenue
JCC



I think a knowledge of physics and biology can harm one's understanding of the nature of the brain.

By describing it as an accumulation of neurons and processes, the materialists here (like Drogue I think) aren't explaining how the subjective world of pain and colour can come about.

I think it is a natural consequence of the distribution of particles in the brain and the laws of physics

[Kuciwalker]

Originally posted by Ben Kenobi


True, but now you have a different person.

No, you don't! You take Person A and subject it to certain stimuli. You then create a new person, Person B, with EXACTLY THE SAME PHYSICAL STATE as Person A had before being subjected to the stimuli, then subject Person B to EXACTLY THE SAME STIMULI. You then compare the end physical state of Person A to the end physical state Person B. If the universe is deterministic, they will be EXACTLY THE SAME; if the universe is probabilistic, they may or may not be.

[Rogan Josh]

Originally posted by Ramo
Why shouldn't the mechanism for this "choice" (if you want to compartmentalize the brain in that way) be physical?

Well, this depends on the definition of the word 'physical' of course. If you define physical as meaning explainable (or predictable) by physical law, then it cannot be physical by definition. Physics has no room for choice, because choice means that it cannot (reliably) be predicted by an observer. Ergo, it is non-physical. If your 'choice' were describable by a physics law that could (one day) be taught in schools then it is no longer a choice, because your decision is prescribed by the physical law.

But non-physical is an expression which conjours up supernatural shenanigans in most people's minds, so I don't like it. I would rather say 'non-predictive'.

[Solly]

I think it is a natural consequence of the distribution of particles in the brain and the laws of physics

You are still describing this in a third-person way.

The big mystery at the moment in physics is the role of the observer/consciousness as a first-person entity.

[Ramo]

Well, this depends on the definition of the word 'physical' of course. If you define physical as meaning explainable (or predictable) by physical law, then it cannot be physical by definition. Physics has no room for choice, because choice means that it cannot (reliably) be predicted by an observer. Ergo, it is non-physical. If your 'choice' were describable by a physics law that could (one day) be taught in schools then it is no longer a choice, because your decision is prescribed by the physical law.

That's why I put quotes around the word "choice" as I don't believe it's nonpredictable by physical laws. The phrasing is the result of the way we compartmentalize higher level brain functions (so there appears to be some sort of thinking center). I don't think the that we do compartmentalize higher level brain functions implies that there are supernatural aspects to our though processes.

[Zero]

About Probalistic VS deterministic universe.

Well there is no way to prove such theories can it? due to uncertainty principle. As long as we are uncertain to some degree you can always base on that small infitismal error in accuracy can snowball up to radically different outcome.

So no point in arguing seriously, but it is fun to talk about it. (Did I just beat the dead horse? sorry)

[Rogan Josh]

That's not quite true zero. The uncertainty principle has been twisted a bit for the comsumption of the general public. It is true that if we know a particle's momentum then we cannot know its position, but it is not that we don't know its state. It really just has no well defined position.

In technical terms the particle cannot be in an eigenstate of momentum and position at the same time (or to be even more tchnical, the position and momentum operators don't commute). We can still work out perfectly well how the state will change with time and how it will interact with other particles. The only thing we can't say is which eigenstate the particle will fall into when a measurment is made (although we can say it will fall into state x with y% probability).

So we can in principle know the exact state of a system; we just can't know the value of certain quantities because they are not properly defined. Of course, you could argue that we can never put the particle back into a particular state without collapsing wavefunctions again, but that is a separate issue.

[Solly]

I'm surprised we haven't got a few more free-thinkers about this topic on Apolyton. A lot of very othodox views that are starting to become discredited. I wonder why that is, when there are lots of wacky theories about economics and politics doing the rounds here.

[Kuciwalker]

Originally posted by Zero
About Probalistic VS deterministic universe.

Well there is no way to prove such theories can it? due to uncertainty principle. As long as we are uncertain to some degree you can always base on that small infitismal error in accuracy can snowball up to radically different outcome.

So no point in arguing seriously, but it is fun to talk about it. (Did I just beat the dead horse? sorry)

Even with the uncertainty principle, a probabilistic universe could be proved. However, I imagine proving a deterministic one would be nigh-impossible.

[Kuciwalker]

Originally posted by Park Avenue
I'm surprised we haven't got a few more free-thinkers about this topic on Apolyton. A lot of very othodox views that are starting to become discredited. I wonder why that is, when there are lots of wacky theories about economics and politics doing the rounds here.

The fact that they may or may not be "orthodox" doesn't mean we aren't freethinkers; these principles are (relatively) easy to come to on one's own. It just means we aren't loons

[Solly]

It may not be a probabilistic or deterministic universe in our senses of the world. Some sort of non-algorithmic thing.

[Dr Strangelove]

Perhaps free will comes from the sheer complexity of the human brain, a complexity that is so great that in practice the output of any given person's brain is not predictable. The problem may not be so much the question of whether the human brain works on deterministic principles, but rather whether is it practical for us to make a claim of having anywhere near sufficient knowledge about it's function as to make predictions about a person's behavior.
The human cerebrum has ten billion neurons. Today we are making computers which superficially seem to approach the human brain in complexity, but it muist be remembered that while computers are basically binary systems, the human brain is an analog machine. Thus a computer with a memory of ten billion bits would not have the same "power" as the human brain. It is not currently possible to make a rational comparison between the basic unit of the computer, the micro-transistor, and the basic unit of the human brain, because while we know that the micro-transistor has two degrees of freedom we have not determined the degrees of freedom af any given type of neuron, and furthermore there is an enormous diversity of form and function among neurons. Also consider that while the computer's "brain" is organized into a processing area, the CPU, and memory areas, RAM and hard drive, in the brain no such division seems to exist. As best we know now every part of the brain contributes both to memory and processing.
Finally, consider that the human brain is a product of evolution, designed to ensure as best it can the survival of the human species. Parts of the human brain, like the brainstem are very ancient, being found even in pre-vertebrate sharks. Above the brainstem are the basal ganglia and paleocerebrum, which mediate the higher funcions in reptiles. In humans the older parts of the brain, areas which in reptiles mediate instinctual behavior, have become adapted to regulate and mediate our emotions and to play a role in the incorporation of longterm memory. Together these old parts of the brain are often called "the limbis system". Most of the old instinctual programmed behavior has been lost, but instead those areas of the brain work reciprocally with the higher brain to guide our behavior.
One portion of these ancient areas of the brain, the hippocampus governs our ability to "solidify" short term memory into long term memory. Destroy it and you will never be able to remember anything new for more than a day. Adjacent to the hippocampus is a structure called the amygdala. This structure seems to have an important role in governing emotional behaviors like rage, fear, and love. If you use precision techniques to destroy it the hippocampus doesn't work very well. Thus it seems that our emotions play a major rolee in how our memory works. That's really not such Earth shattering news is it? The way the brain seems to work then is that the thinking brain and the emotional brain reciprocally control each other.
Why does this contribute to "free will"? The emotional brain doesn't work on the same principles as the thinking brain. Some areas of it are more difficult to control. On a physiological level this is exemplified by the phenomenon of "kindling" in the amygdala. If you stick an electrode in the right place in a cat's amygdala and apply a minute current the subject cat will exhibit sham rage. It will hiss, spit and attack everything in site, but when the current is turned off it returns to normal like nothing happened. Move the electrode a few dozen microns and when you turn the kitty on the rage continues for an extended period of time after the current is turned off. So if something happens to turn on this "kindling" of the amygdala an emotional response occurs that persists and perhaps spills over to involve subjects or events completely unrelated to the subject or even that originally triggered the reaction. For example, the anger you felt at work when something went wrong today may spill over into your interactions with your family this evening. Because of the reciprocal interaction of the subjective and objective parts of the brain human behavior is inherently subject to being irrational and unpredictable.
Someone could argue that just because we're unable to completely understand ourselves today that doesn't mean that someday we will reach a sufficient level of understanding to prove that free will does not exist. Someone else may argue that once we reach such a level of understanding we will find that the human mind in all it's complexity, and working upon the basis of the subjective-objective reciprocal duality, creates in itself an entity that is original and integral above it's environment and thus exhibits "free will".
We're a long way from that day now, so currently we have to admit that free will exists if only because we are insufficient to understand its deterministic nature. On the other hand, even the most die-hard free will proponent would have to admit that we and our choices are influenced by our environment. Let me close then with this question: Why are we asking this question?