Three possibilities come to mind:
Is there an evolutionary purpose?
Does it arise as a consequence of our mental activities, a sort of side effect of our thinking?
Is it given a priori (something we have to think in order to think at all)?
EDIT: Thanks for all the responses! Just one thing I saw come up a few times I’d like to address: a lot of people are asking ‘Why assume this?’ The answer is: it’s purely rhetorical! That said, I’m happy with a well thought-out ‘I dispute the premiss’ answer.
Roger Penrose is pretty much the only dude looking into consciousness from the perspective of a physicist
He thinks consciousness has to do with “quantum bubble collapse” happening inside our brains at a very very tiny level.
That’s the only way free will could exist.
If consciousness is anything else, then everything is predetermined.
Like, imagine dropping a million bouncy balls off the hoover dam. You’ll never get the same results twice.
However, that’s because you’ll never get the same conditions twice.
If the conditions are exactly the same down to an atomic level… You’ll get the same results every time
What would give humans free will would be the inherent randomness if the whole “quantum bubble collapse” was a fundamental part of consciousness.
That still wouldn’t guarantee free will, but it would make it possible.
There’s also the whole thing where what we think of as our consciousness isn’t actually running the show. It’s just a narrator that’s summarizing everything up immediately after it happened. What’s actually calling the shot is other parts of our brains, neurons in our gut, and what controls our hormones.
We don’t know if that’s not true either. But if it was, each person as a thing would have free will, it’s just what we think of as that person does not have free will.
Sounds batshit crazy and impossible, until you read up on the studies on people who had their brains split in half at different stages of mental development.
There’s a scary amount of shit we don’t know about “us”. And an even scarier amount we don’t know about how much variation there is with all that
Roger Penrose is pretty much the only dude looking into consciousness from the perspective of a physicist
I would recommend reading the philosophers Jocelyn Benoist and Francois-Igor Pris who argue very convincingly that both the “hard problem of consciousness” and the “measurement problem” stem from the same logical fallacies of conflating subjectivity (or sometimes called phenomenality) with contextuality, and that both disappear when you make this distinction, and so neither are actually problems for physics to solve but are caused by fallacious reasoning in some of our a priori assumptions about the properties of reality.
Benoist’s book Toward a Contextual Realism and Pris’ book Contextual Realism and Quantum Mechanics both cover this really well. They are based in late Wittgensteinian philosophy, so maybe reading Saul Kripke’s Wittgenstein on Rules and Private Language is a good primer.
That’s the only way free will could exist…What would give humans free will would be the inherent randomness if the whole “quantum bubble collapse” was a fundamental part of consciousness.
Even if they discover quantum phenomena in the brain, all that would show is our brain is like a quantum computer. But nobody would argue quantum computers have free will, do they? People often like to conflate the determinism/free will debate with the debate over Laplacian determinism specifically, which should not be conflated, as randomness clearly has nothing to do with the question of free will.
If the state forced everyone into a job for life the moment they turned 18, but they chose that job using a quantum random number generator, would it be “free”? Obviously not. But we can also look at it in the reverse sense. If there was a God that knew every decision you were going to make, would that negate free will? Not necessarily. Just because something knows your decision ahead of time doesn’t necessarily mean you did not make that decision yourself.
The determinism/free will debate is ultimately about whether or not human decisions are reducible to the laws of physics or not. Even if there is quantum phenomena in the brain that plays a real role in decision making, our decisions would still be reducible to the laws of physics and thus determined by them. Quantum mechanics is still deterministic in the nomological sense of the word, meaning, determinism according to the laws of physics. It is just not deterministic in the absolute Laplacian sense of the word that says you can predict the future with certainty if you knew all properties of all systems in the present.
If the conditions are exactly the same down to an atomic level… You’ll get the same results every time
I think a distinction should be made between Laplacian determinism and fatalism (not sure if there’s a better word for the latter category). The difference here is that both claim there is only one future, but only the former claims the future is perfectly predictable from the states of things at present. So fatalism is less strict: even in quantum mechanics that is random, there is a single outcome that is “fated to be,” but you could never predict it ahead of time.
Unless you ascribe to the Many Worlds Interpretation, I think you kind of have to accept a fatalistic position in regards to quantum mechanics, mainly due not to quantum mechanics itself but special relativity. In special relativity, different observers see time passing at different rates. You can thus build a time machine that can take you into the future just by traveling really fast, near the speed of light, then turning around and coming back home.
The only way for this to even be possible for there to be different reference frames that see time pass differently is if the future already, in some sense, pre-exists. This is sometimes known as the “block universe” which suggests that the future, present, and past are all equally “real” in some sense. For the future to be real, then, there has to be an outcome of each of the quantum random events already “decided” so to speak. Quantum mechanics is nomologically deterministic in the sense that it does describe nature as reducible to the laws of physics, but not deterministic in the Laplacian sense that you can predict the future with certainty knowing even in principle. It is more comparable to fatalism, that there is a single outcome fated to be (that is, again, unless you ascribe to MWI), but it’s impossible to know ahead of time.
Even if they discover quantum phenomena in the brain
There 100% are…
Penrose thinks they’re responsible for consciousness.
Because we also don’t know what makes anesthesia stop consciousness. And anesthesia stops consciousness and stops the quantum process.
Now, the math isn’t clean. I forget which way it leans, but I think it’s that consciousness kicks out a little before the quantum action is fully inhibited?
It’s been a minute, and this shit isn’t simple.
Unless you ascribe to the Many Worlds Interpretation
This is incompatible with that.
It’s the quantum wave function collapse that’s important. There’s no spinning out where multiple things happen, there is only one thing. After wave collapse, is when you look in the box and see if the cats dead.
In a sense it’s the literal “observer effect” happening our head.
And that is probably what consciousness is.
It’ll just take a while till we can prove it. And Penrose will probably be dead by then. But so was Einstein before Penrose proved most of his shit was true
That’s how science works. Most won’t know who Penrose is till he’s dead.
There 100% are…
If you choose to believe so, like I said I don’t really care. Is a quantum computer conscious? I think it’s a bit irrelevant whether or not they exist. I will concede they do for the sake of discussion.
Penrose thinks they’re responsible for consciousness.
Yeah, and as I said, Penrose was wrong, not because the measurement problem isn’t the cause for consciousness, but that there is no measurement problem nor a “hard problem.” Penrose plays on the same logical fallacies I pointed out to come to believe there are two problems where none actually exist and then, because both problems originate from the same logical fallacies. He then notices they are similar and thinks “solving” one is necessary for “solving” the other, when neither problems actually existed in the first place.
Because we also don’t know what makes anesthesia stop consciousness. And anesthesia stops consciousness and stops the quantum process.
You’d need to define what you mean more specifically about “consciousness” and “quantum process.” We don’t remember things that occur when we’re under anesthesia, so are we saying memory is consciousness?
Now, the math isn’t clean. I forget which way it leans, but I think it’s that consciousness kicks out a little before the quantum action is fully inhibited? It’s been a minute, and this shit isn’t simple.
Sure, it’s not simple, because the notion of “consciousness” as used in philosophy is a very vague and slippery word with hundreds of different meanings depending on the context, and this makes it seem “mysterious” as its meaning is slippery and can change from context to context, making it difficult to pin down what is even being talked about.
Yet, if you pin it down, if you are actually specific about what you mean, then you don’t run into any confusion. The “hard problem of consciousness” is not even a “problem” as a “problem” implies you want to solve it, and most philosophers who advocate for it like David Chalmers, well, advocate for it. They spend their whole career arguing in favor of its existence and then using it as a basis for their own dualistic philosophy. It is thus a hard axiom of consciousness and not a hard problem. I simply disagree with the axioms.
Penrose is an odd case because he accepts the axioms and then carries that same thinking into QM where the same contradiction re-emerges but actually thinks it is somehow solvable. What is a “measurement” if not an “observation,” and what is an “observation” if not an “experience”? The same “measurement problem” is just a reflection of the very same “hard problem” about the supposed “phenomenality” of experience and the explanatory gap between what we actually experience and what supposedly exists beyond it.
It’s the quantum wave function collapse that’s important.
Why should I believe there is a physical collapse? This requires you to, again, posit that there physically exists something that lies beyond all possibilities of us ever observing it (paralleling Kant’s “noumenon”) which suddenly transforms itself into something we can actually observe the moment we try to look at it (paralleling Kant’s “phenomenon”). This clearly introduces an explanatory gap as to how this process occurs, which is the basis of the measurement problem in the first place.
There is no reason to posit a physical “collapse” or even that there exists at all a realm of waves floating about in Hilbert space. These are unnecessary metaphysical assumptions that are purely philosophical and contribute nothing but confusion to an understanding of the mathematics of the theory. Again, just like Chalmers’ so-called “hard problem,” Penrose is inventing a problem to solve which we have no reason to believe is even a problem in the first place: nothing about quantum theory demands that you believe particles really turn into invisible waves in Hilbert space when you aren’t looking at them and suddenly turn back into visible particles in spacetime when you do look at them.
That’s entirely metaphysical and arbitrary to believe in.
There’s no spinning out where multiple things happen, there is only one thing. After wave collapse, is when you look in the box and see if the cats dead. In a sense it’s the literal “observer effect” happening our head. And that is probably what consciousness is.
There is only an “observer effect” if you believe the cat literally did turn into a wave and you perturbed that wave by looking at it and caused it to “collapse” like a house of cards. What did the cat see in its perspective? How did it feel for the cat to turn into a wave? The whole point of Schrodinger’s cat thought experiment was that Schrodinger was trying to argue against believing particles really turn into waves because then you’d have to believe unreasonable things like cats turning into waves.
All of this is entirely metaphysical, there is no observations that can confirm this interpretation. You can only justify the claim that cats literally turn into waves when you don’t look at them and there is a physical collapse of that wave when you do look at them on purely philosophical grounds. It is not demanded by the theory at all. You choose to believe it purely on philosophical grounds which then leads you to think there is some “problem” with the theory that needs to be “solved,” but it is purely metaphysical.
There is no actual contradiction between theory and evidence/observation, only contradiction between people’s metaphysical assumptions that they refuse to question for some reason and what they a priori think the theory should be, rather than just rethinking their assumptions.
That’s how science works. Most won’t know who Penrose is till he’s dead.
I’d hardly consider what Penrose is doing to be “science” at all. All these physical “theories of consciousness” that purport not to just be explaining intelligence or self-awareness or things like that, but more specifically claim to be solving Chalmers’ hard axiom of consciousness (that humans possess some immaterial invisible substance that is somehow attached to the brain but is not the brain itself), are all pseudoscience, because they are beginning with an unreasonable axiom which we have no scientific reason at all to take seriously and then trying to use science to “solve” it.
It is no different then claiming to use science to try and answer the question as to why humans have souls. Any “scientific” approach you use to try and answer that question is inherently pseudoscience because the axiomatic premise itself is flawed: it would be trying to solve a problem it never established is even a problem to be solved in the first place.
I don’t think it’s incompatible with many worlds, unless I’m misunderstanding something. The many worlds interpretation means that the observer doesn’t collapse the wave function, but rather becomes entangled with it. It only apparently collapses because we only perceive a “slice” of the wave function. (For whatever reason).
I think this is still compatible with Penrose’s ideas, just not in the way he presents it. Anyway, I think he’s not really explaining consciousness, but rather a piece of how it could be facilitated in the brain.
There are quantum phenomenon in a piece of bread. That doesn’t mean bread is conscious.
Penrose has never proved that the quantum effects affect neurons macroscopically.
Quantum computers run at near absolute zero temperature and isolated from all vibrations in order to maintain superposition. The brain is a horrible environment for a quantum computer.
Anesthesia is a chemical signal blocker. If consciousness was quantum, it couldn’t affect it.
Penrose’s work is “God in the gaps” or in his case “quantum in the gaps” explanation of consciousness. His claims were made before we had functional quantum computers and precise categorization of neurotransmitters that anesthesia chemicals bind to to block your natural neurotransmitters.
https://www.scientificamerican.com/article/how-does-anesthesia-work/
Why are we assuming we don’t have free will? We do. Its not total freedom, our freedom is contingent on existing circumstances, but hard determinism is easily disprovable.
The idea that there is no free will is a mind fuck that keeps you from questioning your reality. You might as well ask, “assuming the earth is flat, why does the stick disappear on the horizon?”
This is a nice and brief video that I’ve found persuasive. https://youtu.be/eELfSwqJNKU
Noone believes that people have full freedom with no context, no extenuating circumstances. What makes arguments like this seem convincing is how uncommon it is for people to think dialectically.
Here’s a very good essay that steps through all of the different parts of the problem, and looks at different views historically. https://www.marxists.org/archive/plekhanov/1898/xx/individual.html
To the hard deterministic explanation that “something always came before,” it asks “what is the role of the individual in history?”
This excerpt isn’t a substitute for reading the whole essay but it makes a point pretty concisely:
But let us return to our subject. A great man is great not because his personal qualities give individual features to great historical events, but because he possesses qualities which make him most capable of serving the great social needs of his time, needs which arose as a result of general and particular causes. Carlyle, in his well-known book on heroes and hero-worship, calls great men beginners. This is a very apt description. A great man is precisely a beginner because he sees further than others, and desires things more strongly than others. He solves the scientific problems brought up by the preceding process of intellectual development of society; he points to the new social needs created by the preceding development of social relationships; he takes the initiative in satisfying these needs. He is a hero. But he is not a hero in the sense that he can stop, or change, the natural course of things, but in the sense that his activities are the conscious and free expression of this inevitable and unconscious course. Herein lies all his significance; herein lies his whole power. But this significance is colossal, and the power is terrible.
Because it’s not an illusion.
Determinism seems reasonable only because people have an inaccurately simplistic conception of causation, such that they believe that consciousness and choice violate it, rather than being a part of it.
Causation isn’t a simple linear thing - it’s an enormously complex web in which any number of things can be causes and/or effects of any number of things.
Free will (properly understood) is just one part of that enormously complex web.
How is our experience of decision making different to one where we reach an inevitable outcome based on a complex set of parameters?
Because there are points at which, exactly as seems to be the case, we consciouly choose to follow one particular path in spite of the fact that we could just as easily have chosen another.
Even in that scenario, the “conscious choice” happened via some particular arrangement of neurons/chemical messengers/etc. Your argument is a “god of the gaps” argument- science doesn’t know everything about how the brain works, therefore some supernatural process called “free will” is the cause of the stuff science can’t explain yet.
(No knock on you, you’re having a good faith debate :)
I agree that it “seems to be the case” that we consciously choose, but I don’t understand where you found justification to state that there really are such points. How do you dismiss the idea that our conscious choice is not simply an application of the myriad parameters?
Simple: We cannot predict the future. If you don’t know what’s going to happen nor whether it is being controlled, you do not know whether your actions are predetermined. Every movement you make might be the result of universal programming. What I’m typing, have sent, and you are reading might be the sequence of events that was always supposed to happen.
Free will is, IMO, as unknowable as whether an almighty being exists. That “almighty being” might have created this existence, but might also exist in its own realm that was created by another “almighty being”. The chain might be infinite and it might not be. Asking these questions is like asking “can we reach infinity”.
That’s a very large assumption. The simplest explanation is that we feel like we have free will because we do. Quantum mechanics suggests some major challenges to determinism, and the best arguments to restore it require a very unsatisfying amount of magical thinking.
