Mental imagery as non-physical experience

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AgnosticBoy
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Mental imagery as non-physical experience

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Post by AgnosticBoy »

On another thread, I argued that mental imagery is nonphysical in that it lacks physical characteristics. Some materialists disagreed offering nothing more than a future promise that we'll discover how they're "purely physical". Here's one description of a type of mental imagery:
A hallucination is a perception in the absence of external stimulus that has qualities of real perception. Hallucinations are vivid, substantial, and are perceived to be located in external objective space. They are distinguishable from these related phenomena: dreaming, which does not involve wakefulness; illusion, which involves distorted or misinterpreted real perception; imagery, which does not mimic real perception and is under voluntary control; and pseudohallucination, which does not mimic real perception, but is not under voluntary control.[1] Hallucinations also differ from "delusional perceptions", in which a correctly sensed and interpreted stimulus (i.e., a real perception) is given some additional (and typically absurd) significance.

Hallucinations can occur in any sensory modality—visual, auditory, olfactory, gustatory, tactile, proprioceptive, equilibrioceptive, nociceptive, thermoceptive and chronoceptive
Source: https://en.wikipedia.org/wiki/Hallucination

My view is that the perception of mental images constitutes an experience of something non-physical. For those who think otherwise, please do the following:

Explain how or why the experience of hallucinations is physical or of something physical.
Last edited by AgnosticBoy on Fri Nov 03, 2017 4:32 am, edited 1 time in total.

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Post #61

Post by DrNoGods »

[Replying to post 53 by AgnosticBoy]
Can you demonstrate that your theory of mental imagery and our perception of it (both of which I argue involve nonphysical features) is correct? And I mean can you provide scientific peer-reviewed evidence?
Here's an article you may find interesting from 2015 in Trends in Cognitive Science, with a number of references:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4595480/

From the abstract:

"Research supports the claim that visual mental imagery is a depictive internal representation that functions like a weak form of perception. Brain imaging work has demonstrated that neural representations of mental and perceptual images resemble one another as early as the primary visual cortex (V1). Activity patterns in V1 encode mental images and perceptual images via a common set of low-level depictive visual features."
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Post #62

Post by Divine Insight »

William wrote: [Replying to post 57 by Divine Insight]

On Memory...

If you were to have an experience and write it down strait away, and place this into a sealed container and then at least once a day think about that experience, going over it in your mind (as constructed) and did this for 20 years (perhaps not daily going over it, but now and again) then at the end of that time, write down your memory of the experience and then open the sealed container and take out the note about your experience, how different from the original note would your memory note of it 20 years later be, according to the theory that memory is not a reliable thing?
You need to keep in mind that when studies like these are done they are done on a group of individuals. So when the result says that memory is not reliable it is speaking in general terms. Some individuals have better memory capabilities than others.

In fact some individuals have what is called a "photographic memory". They're ability to reconstruct visual images as mental images is so profound they can recall extreme details with a very high degree of accuracy.

I think this is yet another example that favors the materialistic view. All brains are not equally efficient at things like memory or reconstructing images. Why should that be the case if we are all "spiritual souls" who do the memorizing and image recalling?

I would think that if we are all "spiritual souls" who do this, then we should all be able to do it with precisely the same level of competence.

That's clearly not the case, so this favors the materialistic view that brains simply develop differently as they grow and produce a wider range of capabilities and efficiencies.

As to your question about continually recalling a specific memory. I would think that by doing so your are "burning" that memory into your brain over and over again. So there's a good chance that you'll remain fairly consistent on that specific memory. However, if you are never allowed to actually write anything down, and the event you are attempting to remember is quite complex, then there is a good chance that you'll start to change the details over time.

In fact, repetition definitely serves to reinforce our memory.

Many years ago when I was in college I took a course on scientific and technical writing. The professor would dance into the classroom at the beginning of every class singing, "Audience and Purpose, Audience and Purpose".

He did this specifically to burn this into our memories. He told us if the only thing we got from his class is the importance of focusing on who our audience is, and what our purpose is in our writing, the course will have been worth it just for those key points.

Obviously he also knew that repetition burns in vivid memories. :D

So yes, if you reconstruct you memory often it will increase the likelihood that you'll retain that particular memory much longer.

This also fits in with a materialistic view of the brain. After all, why should a "soul" need to continually reconstruct a memory? In fact, how does a "soul" remember anything?

If we are spiritual souls and spirit is what's doing the memorizing, then shouldn't we all be able to remember everything that ever happens perfectly forever? Why should the memory of a non-physical spirit ever be faulty?
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Post #63

Post by William »

[Replying to post 59 by DrNoGods]

Yes - I was thinking how I can remember my neighborhood, and generally any event which had some significance - and also some events I had forgotten about but for some reason remembered again.

The events which had the most significant impact on me are the ones which I remember the clearest.

[Replying to post 61 by Divine Insight]
You need to keep in mind that when studies like these are done they are done on a group of individuals. So when the result says that memory is not reliable it is speaking in general terms. Some individuals have better memory capabilities than others.
Yes - I thought as much. It focuses upon general memory rather than specific. Brains don't store memory - at least not in a specific manner...but something is happening and something is able to cause recall and reconstruct adequately.

I can map out the neighborhood I grew up in. I can put names to faces. Are we to believe that this is just a construct and that the names don't match the faces, or the map is incorrect?

I remember the color of the paint and what type of material the house I lived in was. I remember the layout of the rooms.

Am I to believe that I have simply constructed something to accommodate me but which in truth, was not the case?

I can even now see a mental image of the house...is this to say that unless I have specific recall then my memory is faulty because my brain did not store the information in a specific manner?

Or is it acceptable that a general memory of events is sufficient.

In fact some individuals have what is called a "photographic memory". They're ability to reconstruct visual images as mental images is so profound they can recall extreme details with a very high degree of accuracy.
I read up on that recently and the impression I got is that photographic memory is more myth than matter of fact. But if it is fact, then this could be seen as brains (or some other source) are able to somehow store memory of events and reconstruct them as non physical images in the head.
I think this is yet another example that favors the materialistic view.


Is there any example of anything which favors the "spiritual' view that you can think of?
All brains are not equally efficient at things like memory or reconstructing images. Why should that be the case if we are all "spiritual souls" who do the memorizing and image recalling?
I recall hearing a claim that a person drowning sees their whole life flashing before their eyes....

... just googled "does a drowning person see their whole life flashing before their eyes?" ...nothing on drowning specifically but much on going through the proces of dying but for one reason or the other, surviving the experience.

A myriad of interesting reading but very suggestive of something - either the brain itself or some other unknown 'spiritual' storage facility keeping the memories intact and by many accounts, vividly so.
I would think that if we are all "spiritual souls" who do this, then we should all be able to do it with precisely the same level of competence.
Unless the physical human body suppresses that ability.
That's clearly not the case, so this favors the materialistic view that brains simply develop differently as they grow and produce a wider range of capabilities and efficiencies.
I don't think it is 'clearly not the case' for the reason I suggested above. We know that each body is unique and some are better at some things than others, but this in itself does not force one to suppose that it is all about materialism.
As to your question about continually recalling a specific memory. I would think that by doing so your are "burning" that memory into your brain over and over again.
Okay. So the brain (or some other attribute) can store memory if impressed upon.
This also fits in with a materialistic view of the brain. After all, why should a "soul" need to continually reconstruct a memory? In fact, how does a "soul" remember anything?

If we are spiritual souls and spirit is what's doing the memorizing, then shouldn't we all be able to remember everything that ever happens perfectly forever? Why should the memory of a non-physical spirit ever be faulty?
As someone who heavily leans toward the materialistic world view, your questions are natural enough but is it presumptuous to think of souls and spiritual things as having to be perfect? Or even if they were far better than human forms and could store every detail of every moment of ones lifetime, why presume that such an attribute should be utilized in the human experience.
Perhaps the design of the human bodies was purposeful in that regard.

How would you know? My understanding of the soul is that it is a storage facility and what it stores is the total data of experience of the individual.
If we are spiritual beings why would we incarnate into physical containers which are unpredictably unique for their strengths and weaknesses?

Perhaps it is for the experience of being vulnerable and captivated?

Point being, I can appreciate your tendency to continually advocate materialism, but find your reasons for doing so have to include presuming things about the spiritual which tend to point at the probability that the spiritual most likely doesn't exist. This might help strengthen your resolve to eventually embrace materialism completely - I mean - it seems to suit you well enough from what I can gather in your posts - or do you think that your will never be quite sure enough and there will always be some doubt and that is why you remain - in name at least - an agnostic?

I think agnosticism should remain in the relative position of neither/nor but I am sure you could agree with me that you are definitely someone who leans toward materialism and consistently advocates materialism as the best option, all said and done.

I think thoughts are also non physical. Yes I understand that in relation to the physical universe, we are within the human experience and so cannot avoid physicality - the physical aspect of being physical...so the brain has something to do with the process, but is that to say that it has everything to do with the process. Materialists say 'yes'.

Yet thoughts are not always physical. If they were, wouldn't we be able to read each others without having to actually read them?

There is a whole private universe within our individual experience which is non physical. Only a tiny fraction of that makes it to the physical surface-tobe viewed under the lens of materialism.

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Post #64

Post by Divine Insight »

William wrote: I think agnosticism should remain in the relative position of neither/nor but I am sure you could agree with me that you are definitely someone who leans toward materialism and consistently advocates materialism as the best option, all said and done.
I'm just observing that materialists have the best arguments. That's hardly "leaning". :D

And besides, materialism is not the same as atheism. In fact, why should we demand that a "God" is non-physical. Isn't that kind of silly?

Physics is nothing more than the rules that describe how something functions. If there is a God and it functions in any sort of coherent manner, then it must also be physical, even if those laws of physics are different from what we are used to. They would almost certainly need to make logical sense if the God is going to be coherent in any manner at all.

However, in this thread I wasn't talking about God or what properties a God might have. In this thread I was simply pointing out what is obviously a function of the material brain versus what could potentially be a function of an imaged "soul". Even if this soul has some sort of physics in a higher dimension there are still problems. For example why should a person who is born blind not be able to create mental images in their mind if the mind actually belongs to the "soul"?

Clearly there's a problem here that favors materialism dramatically.

Could we imagine a God who plays all manner of games with humans controlling who can think certain ways, etc. Sure we could. But just look at how devious of a God this would ultimately need to be. It's just not a practical hypothesis.

When we find ourselves bending over backwards to the point that we have inserted our head into our posterior and have become totally blind to common sense in the process, I think it's time to stand up straight again and take a deep breath and ask ourselves why it is that we are so obsessed with bending over backwards in an effort to support a "God hypothesis" when the hypothesis of materialism already makes perfect sense? :-k

Can we come up with endless apologies for why an imaginary God might do all manner of utterly absurd things? Sure. But why bother when materialism works just fine in broad daylight with no excuses required?

Are we supposed to deny rational explanations? :-k

What's the purpose of that?
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Post #65

Post by Danmark »

William wrote: I can appreciate your tendency to continually advocate materialism, but find your reasons for doing so have to include presuming things about the spiritual which tend to point at the probability that the spiritual most likely doesn't exist. This might help strengthen your resolve to eventually embrace materialism completely - I mean - it seems to suit you well enough from what I can gather in your posts - or do you think that your will never be quite sure enough and there will always be some doubt and that is why you remain - in name at least - an agnostic?

I think agnosticism should remain in the relative position of neither/nor but I am sure you could agree with me that you are definitely someone who leans toward materialism and consistently advocates materialism as the best option, all said and done.

I think thoughts are also non physical. Yes I understand that in relation to the physical universe, we are within the human experience and so cannot avoid physicality - the physical aspect of being physical...so the brain has something to do with the process, but is that to say that it has everything to do with the process. Materialists say 'yes'.

Yet thoughts are not always physical. If they were, wouldn't we be able to read each others without having to actually read them?

There is a whole private universe within our individual experience which is non physical. Only a tiny fraction of that makes it to the physical surface-tobe viewed under the lens of materialism.
This post seems to reflect great confusion about 'material/physical' and some alternative way of looking at reality . . . a vague reference to some alternative which is not defined. This is one of the problems with the religious perspective which has some fuzzy, undefined view of some alternate way of looking at reality. This is in general a call to a reference to 'the spiritual.' But no one suggests what this 'spiritual' realm or reality is. It is a reference to both mystery and ignorance. This anti materialism argument calls for an unnamed 'X' reality that is nothing more than a call to ignorance.

The religious constantly refer the material world and materialism to support their arguments when they think it serves their conclusions or beliefs. They appeal to 'history' when they think their version of history supports what they believe. But whenever materialism leads to a failed argument; whenever the physical reality of facts undermines the position of religious faith, suddenly they abandon the physical/material reality and this undefined 'spiritual' mystery realm of ignorance is suggested as a replacement, some uber reality based on ignorance.

This constant shifting of reference to reality suggests an absence of intellectual rigor.

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Post #66

Post by William »

[Replying to post 63 by Divine Insight]

Rather than take the thread off on this tangent anymore, I have replied to you here.

Meanwhile I did make some observations in my last post to do with this thread subject if you want to respond to those, that would be good.

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Post #67

Post by Divine Insight »

William wrote:
I think thoughts are also non physical. Yes I understand that in relation to the physical universe, we are within the human experience and so cannot avoid physicality - the physical aspect of being physical...so the brain has something to do with the process, but is that to say that it has everything to do with the process. Materialists say 'yes'.

Yet thoughts are not always physical.
Can you demonstrate a thought that can exist without a brain?

Your claim that thoughts are not always physical is just an opinion that has no evidence to back it up. So it's meaningless as an argument. Just because you make a claim doesn't automatically make the claim true.
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Post #68

Post by Divine Insight »

William wrote: [Replying to post 63 by Divine Insight]

Rather than take the thread off on this tangent anymore, I have replied to you here.

Meanwhile I did make some observations in my last post to do with this thread subject if you want to respond to those, that would be good.
You're the one who took this thread off onto a PERSONAL TANGENT by accusing me of not being agnostic again. :roll:

And I have already answered your concern, so there is no need to take it any further.

Just because I recognize that materialists have the best arguments does not mean that I "lean" toward materialism as a worldview. I simply recognize that it's the best argument thus far. Especially concerning the topic of this thread.
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Post #69

Post by Danmark »

Divine Insight wrote:
William wrote:
I think thoughts are also non physical. Yes I understand that in relation to the physical universe, we are within the human experience and so cannot avoid physicality - the physical aspect of being physical...so the brain has something to do with the process, but is that to say that it has everything to do with the process. Materialists say 'yes'.

Yet thoughts are not always physical.
Can you demonstrate a thought that can exist without a brain?
This is a very powerful argument against the 'magical/spiritual' argument, an argument that essentially is a cop out because it says, 'I have no argument based on the scientific/empirical/physical world in which we all agree we live.'

Thoughts are products of a physical brain. When the brain is destroyed, thought is destroyed. As DI argues, there is no evidence of a thought that has ever existed in the absence of a physical brain to produce it.

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Post #70

Post by William »

[Replying to post 66 by Divine Insight]
Can you demonstrate a thought that can exist without a brain?
Did I claim that?
Your claim that thoughts are not always physical is just an opinion that has no evidence to back it up.
Are we then to define 'what is physical'? Why are you splitting hairs?

We can agree that the proces of thought involves a physical aspect, but that was not what I was pointing out.

The OP speaks of 'mental imagery' which is different from physical imagery.

Thought process is not always about mental imagery. When I went to bed the other night, I was thinking about this thread. Normally I always have imagery involved in the process of preparing to go to sleep.

That night, all I had was a blank slate - a grey screen without imagery - something I cannot recall every experiencing before. It had the effect of getting me to focus upon mental language - language which has no sound, and yet is still 'heard' as language in my mind. Another type of non physical experience happening within the mind-scape.

Ah yes - the vast unlimited realm of the mind-scape - not so much a case "bending over backwards to the point that we have inserted our head into our posterior" as the crudity of your own mental 'insightful' imagery-processes conjured up in it's attempt at 'common sense' :D - but rather the introspective nature of the process has nothing to do with that particular crapping portal.

Your thinly veiled contempt for humans interested in "God hypothesis" is duly noted.

I can assume that the contempt has something to do with your failure to address my replies about your assumptive claims regarding those spiritual/soul comments you made?

And the phenomena of people seeing their whole lives replayed? Where does the brain store all this information and how is it that the brain is able to bring it all back together in a coherent manner which have been reported to even exceed the individuals subjective experience by including other - objectively related - points of view in the replays?

Anyway, what is called the 'subconscious' is indeed as mysterious as GOD.

But it is not to be found up a backside. Just thought I would mention that in the hope that you would reconstruct your mental imagery to align with - well - common sense...and good manners.

Cheers

W

:)

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