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The nature of the Copenhagen Interpretation is exposed by considering a number of experiments and paradoxes.
1. Schrödinger's Cat
A cat is put in a box with a radioactive substance and a radiation detector (such as a geiger counter). The half-life of the substance is the period of time in which there is a 50% chance that a particle will be emitted (and detected). The detector is activated for that period of time. If a particle is detected, a poisonous gas will be released and the cat killed. Schrödinger set this up as what he called a "ridiculous case" in which "The psi-function of the entire system would express this by having in it the living and dead cat (pardon the expression) mixed or smeared out in equal parts." He resisted an interpretation "so naively accepting as valid a 'blurred model' for representing reality."[10] How can the cat be both alive and dead?
The Copenhagen Interpretation: The wave function reflects our knowledge of the system. The wave function simply means that there is a 50-50 chance that the cat is alive or dead.
2. Wigner's Friend
Wigner puts his friend in with the cat. The external observer believes the system is in the state . His friend however is convinced that cat is alive, i.e. for him, the cat is in the state . How can Wigner and his friend see different wave functions?
The Copenhagen Interpretation: Wigner's friend highlights the subjective nature of probability. Each observer (Wigner and his friend) has different information and therefore different wave functions. The distinction between the "objective" nature of reality and the subjective nature of probability has led to a great deal of controversy. Cf. Bayesian versus Frequentist interpretations of probability.
3. Double Slit Diffraction
Light passes through double slits and onto a screen resulting in a diffraction pattern. Is light a particle or a wave?
The Copenhagen Interpretation: Light is neither. A particular experiment can demonstrate particle (photon) or wave properties, but not both at the same time (Bohr's Complementary Principle).
The same experiment can in theory be performed with any physical system: electrons, protons, atoms, molecules, viruses, bacteria, cats, humans, elephants, planets, etc. In practice it has been performed for light, electrons, buckminsterfullerene, and some atoms. Due to the smallness of Planck's constant it is practically impossible to realize experiments that directly reveal the wave nature of any system bigger than a few atoms but, in general, quantum mechanics considers all matter as possessing both particle and wave behaviors. The greater systems (like viruses, bacteria, cats, etc.) are considered as "classical" ones but only as an approximation.
4. EPR (Einstein–Podolsky–Rosen) paradox
Entangled "particles" are emitted in a single event. Conservation laws ensure that the measured spin of one particle must be the opposite of the measured spin of the other, so that if the spin of one particle is measured, the spin of the other particle is now instantaneously known. The most discomforting aspect of this paradox is that the effect is instantaneous so that something that happens in one galaxy could cause an instantaneous change in another galaxy. But, according to Einstein's theory of special relativity, no information-bearing signal or entity can travel at or faster than the speed of light, which is finite. Thus, it seems as if the Copenhagen interpretation is inconsistent with special relativity.
The Copenhagen Interpretation: Assuming wave functions are not real, wave function collapse is interpreted subjectively. The moment one observer measures the spin of one particle, he knows the spin of the other. However another observer cannot benefit until the results of that measurement have been relayed to him, at less than or equal to the speed of light.
Copenhagenists claim that interpretations of quantum mechanics where the wave function is regarded as real have problems with EPR-type effects, since they imply that the laws of physics allow for influences to propagate at speeds greater than the speed of light. However, proponents of Many worlds[11] and the Transactional interpretation[12][13] maintain that their theories are fatally non-local.
The claim that EPR effects violate the principle that information cannot travel faster than the speed of light can be avoided by noting that they cannot be used for signaling because neither observer can control, or predetermine, what he observes, and therefore cannot manipulate what the other observer measures. Relativistic difficulties about establishing which measurement occurred first also undermine the idea that one observer is causing what the other is measuring.
Originally posted by Astyanax
An atheist is not one who dogmatically insists there cannot be a God. Such a person is not an atheist but a fool. The absence of evidence for God, resounding as it is, can never be adduced as proof that He does not exist. An atheist is simply one who has decided, on balance, that God does not exist. That is atheism, as TruthParadox made clear over and over again on this thread.
Agnosticism is merely a more polite word to describe a fence-sitter than 'coward'. An agnostic is someone who would like to make Pascal's ignoble wager but fears the obloquy of others too much even to do that. To any self-described agnostic who finds these remarks offensive, I say: redefine yourself. You are a victim of a terminological error, and should really be calling yourself an atheist.
n.
1. Disbelief in or denial of the existence of God or gods.
2. The doctrine that there is no God or gods.
...
Definition: belief there is no god
Philosophical definition:
Either the lack of belief that there exists a god, or the belief that there exists none. Sometimes thought itself to be more dogmatic than mere agnosticism, although atheists retort that everyone is an atheist about most gods, so they merely advance one step further.
n.
1.
1. One who believes that it is impossible to know whether there is a God.
2. One who is skeptical about the existence of God but does not profess true atheism.
2. One who is doubtful or noncommittal about something.
...
Definition: person unsure God exists
What I meant is that the sort of personal revelation you were vouchsafed, your first-hand experience of God as you believe it to be, is something only a tiny fraction of humanity is capable of. The mystic is a very special kind of human being, capable of mental states others cannot attain without artificial boosters such as drugs, meditation, long-drawn-out sexual ecstasy and other indignities of the same kind.
I wouldn't like to say if you are crazy or not. You don't sound crazy to me. I believe you had an epiphany of the kind you describe. I believe you are speaking with conviction. Yet to me, none of this adds any force to the argument for God. Even an experience of my own would not convince me, because what you regard as divine epiphany is to my way of thinking simply a very unusual (though not ipso facto pathological) mental state.
And any conclusion a person comes to in an altered state of mind must be treated with grave suspicion.
Originally posted by badmedia
If makinho21 won't take you up on this, I will. I read physics at university and have a hobbyist's interest in philosophy, so we can dispense with preliminaries and take the matter up at a reasonably advanced level. Makinho21 is perfectly correct: quantum mechanics is not what people like Deepak Chopra and our pal OmegaPoint dream it is; things like the observer effect have no implications whatsoever concerning a role for consciousness in the world of phenomena.
I'll play along if your arguments turn out to be worth refuting - I'm not going to repeat what I've so often said before on this forum. But let's find another thread to do it in, shall we? there are a zillion 'quantum physics' and 'law of attraction' threads on ATS already, so if you want to flog this dead horse all over again, let's do it on one of those.
And after your mystical revelation, do you still believe in the existence of something you call an individuated self? Now there's a surprise.
Addendum: Frankly, badmedia, the more I read of your posts in this thread, the less inclined I am to give you the benefit of the doubt. Your understanding of science is typical of an engineer - you think science is about well-defined procedures and predictable outcomes. I'm sorry; that's how engineers are taught because it's their job is to build things and fix them when they break, but it isn't science. Science is open-ended. It is about conceiving, investigating and testing explanations for natural phenomena. Your outlook has nothing whatsoever of the scientific in it and the appeal to your technical background is illegitimate and embarrassing.
But that isn't the real problem. The real problem is that you have begun talking through your hat. The naturalist arguments Welfhard has been making are solidly based in more than one science: neurobiology, evolutionary psychology, statistical analysis and a great deal more; backing these scientific results are some unanswerable arguments in philosophy. You are seeing none of that, you aren't familiar with the science or indeed with the philosophy; you're just talking down to us from the fraudulent eminence of claimed revelation (the eminence is fake even if the claim is not). Your arguments are simplistic; they have been made and refuted countless times before in this forum.
Worst of all, the statements you make based on this personal revelation of yours are curiously old-hat and unsatisfactory - they have no persuasive force and even, from time to time, contradict one another. I have every desire to take you for what you say you are, but I'm beginning to worry.
Originally posted by Astyanax
reply to post by badmedia
I looked at the posts you linked to. I'm sorry, but there is really nothing to respond to. Like that rude, unpleasant person Watcher-In-The-Shadows, your 'knowledge' of quantum mechanics seems to have been derived from overcredulous readings of popular-science articles and New Age speculation rather than by anything amounting to academic study. Your ideas are so mistaken they don't even make it off the starting-block.
Choices are not dimensions. There is no sense in which a probability field comprises a set of real events. Time is not the problem, and taking it out of the picture does not resolve any quantum paradox.
I have grown tired with self limited perception absolutists that can't see past their noses who twist terms to make themselves sound better.
But what you are essentially saying is that consciousness is the result of chemicals and electrical signals and nothing else. So, how are certain chemicals and electrical patterns able to see "images", and how are they able to reason and so forth.
It is NOT logical. You are simply using the complexity of the brain as an excuse and something to put faith into. That is all.
You are simply using the complexity of the brain as an excuse and something to put faith into. That is all.
This you simply don't know what you are talking about. An ex of mine was a psychologist and it's nothing more than the study of behavioral patterns.
Once again it's not something that can be told to someone.
We can even see the brain doing faith - that has been documented.
The research showing that specific mental functions do not correspond directly with certain brain areas but rather a unique pattern of neural connections also provides a more accurate direction for mapping the effective connectivity of the brain. Known as the Connectome Project, the goal of researchers involved in that work is to provide a complete map of the neural circuitry of the central nervous system.
“What our research shows is that if you want to understand human cognitive function, you need to look at system-wide behavior across the entire brain,” explains Hanson. “You can’t do it by looking at single cells or areas. You need to look at many areas of the brain to even understand the simplest of functions.”
[ScienceDaily]
“You can’t just pinpoint a specific area of the brain, for example, and say that is the area responsible for our concept of self or that part is the source of our morality,” says Hanson. “It turns out the brain is much more complex and flexible than that. It has the ability to rearrange neural connections for different functions. By examining the pattern of neural connections, you can predict with a high degree of accuracy what mental processing task a person is doing.“
But what you are essentially saying is that consciousness is the result of chemicals and electrical signals and nothing else. So, how are certain chemicals and electrical patterns able to see "images", and how are they able to reason and so forth.
It is NOT logical. You are simply using the complexity of the brain as an excuse and something to put faith into. That is all.
Most of the greatest minds and thinkers on earth, including Newton, Copernicus, Freud, Jung, Einstein, Plato, Niels Bohr, Da Vinci, Edison, Tesla, Max Planck, etc.etc.etc. were not atheists. In fact they ridiculed them.
Most of the greatest minds and thinkers on earth, including Newton, Copernicus, Freud, Jung, Einstein, Plato, Niels Bohr, Da Vinci, Edison, Tesla, Max Planck, etc.etc.etc. were not atheists. In fact they ridiculed them.
Originally posted by Welfhard
Reasoning is a function of other parts of this computer.
It's not faith, we can see the brain doing task, we can see it doing math, talking, listening, remembering and reasoning - everything we can do as a related brain activity it is all there.
As we evolved and being social beings, selection pressures and a fishy diet caused our brains to grow, our sentience and intelligence till eventually - if an individual was raised in a sufficient environment - it was capable of everything we are. Things with smaller, less complex brains are not so capable in such regards.
That's why if you damage certain parts of the brain, peoples reasoning skills will be impaired - because it's a product of the brain.
Ignoring the concept of faith for a minute, sentience, awareness, emotion, consciousness are self evident as products of the brain. You simply do not like that premise because it means that everything about us is deterministic. You say, "no it's not just patterns of billions of neurons, there is something else and conveniently that something else can violate causality!"
The process in making a conscious decision is a linear one of reasoning. Input triggers perception, triggers a thought which triggers another - until there is a long line of thoughts called a deliberation, which triggers an action.
And now in psych there is some crossing over with neurology and neuropsychology. One of the first things we learnt was how the brain perceives the world visually and the impairments that come with that - entirely neurology there.
Once again that is a copout. If you can't support your argument then you have no business arguing.
Again, how does a bunch of action and reaction equal out to reasoning? Where is the logic behind it? You are saying that if you add enough action and reaction, that suddenly reasoning will come of that. It just isn't logical.