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I think you'll find it is now conventional wisdom. The original work  
is referred in several of the M & V papers, and was conducted to  
address the anomaly of colour perception - which is that while colour  
differentiation can be related to the internal dynamics of an  
organism, it cannot be related to physical fact. In other words, all  
animals have different experiences of colour and none of these  
correlate with physical phenomena such as wavelength. I can look it  
up, but not now. I believe Stafford also refers the said work.

Hence the statement that experientially it is impossible for the  
individual to distinguish between hallucination and perception. In  
terms of internal dynamics they are the same. The only test is with  
reference to a third party.

In terms of the experience of perception (whether hallucination or  
vision), the 'normal' flow of excitations in the nervous system are  
either triggered by events in the eye, or are not. If triggered by the  
eye we may call it percpetion; if not, we call it halluciation (ie the  
70% has taken over the 30%)


Roger
On 21 Mar 2010, at 12:36, Stefan Wasilewski wrote:

> Where did you get this fact?
>
>
> On 21 Mar 2010, at 12:32, Roger Harnden wrote:
>
>> Just to be clear about this, Alfredo, at any instant 70%  of the  
>> input into the visual cortex is from sources within the organism  
>> itself.
>>
>> The experience of perception is NOT caused by excitation of one or  
>> several or a number of individual cells in your eye,
>>
>> Roger
>> On 21 Mar 2010, at 12:10, Roger Harnden wrote:
>>
>>> One can use any word one wants, Alfredo....and  it was me, not Luc  
>>> who mentioned the tree.
>>>
>>> All I am saying that for the human being as a biological organism  
>>> there are no single datum, there are only data. And we use our  
>>> powers of investigation to draw marks in the sand, and say 'this  
>>> is a quark.....that is a human.....this act is evil....etc, etc'.  
>>> But each of these are just marks in the sand, as both Spencer  
>>> Brown and Varela indicated.
>>>
>>> But that is not a limitation - that is the foundation of human  
>>> beings and understanding.
>>>
>>> If you want to restrict it to visual sensations, Maturana's work  
>>> on vision is absolutely clear: single sensors are excited and  
>>> trigger further excitations. The actual sensor has no sensation at  
>>> all....it is just a switch that is triggered or not triggered. In  
>>> point of fact the many singularities that bombard our sensors all  
>>> the time (including our eyes) set up non-stop reverberations into  
>>> our nervous system. Many (most) of these lead to no sensation (of  
>>> sight) whatsoever....they just dissipate. It is only upon the  
>>> triggering of a great number of sensors and their subsequent  
>>> reverberations and interconnectivity with other reverberations  
>>> from other sources (including those within the nervous system  
>>> itself, as cyclical excitations which characterise memory or  
>>> association), that we get anywhere near something that might be  
>>> called (and experienced as) the sensation of sight. Hope that helps
>>>
>>>
>>> Roger
>>>
>>>
>>> On 21 Mar 2010, at 11:49, Alfredo Moscardini wrote:
>>>
>>>>
>>>> I am undestanding more and more and also understanding less and  
>>>> less!!!
>>>>
>>>> Luc has brought in a tree.
>>>>
>>>> OK I can see that I personally interpret what I see as a tree and  
>>>> the concept of treeness is absolutely tied to my expeierience and  
>>>> me.  OK.  What I want to know is what word do we agree to use to  
>>>> describe the visual sensations impinging on my retina.  I want to  
>>>> call this data and the changing of this data into the concept '  
>>>> tree'  is changing this data into information
>>>>
>>>> Alfredo
>>>>
>>>> ----- Original Message -----
>>>>
>>>>
>>>> From: Roger Harnden <[log in to unmask]>
>>>>
>>>> Date: Sunday, March 21, 2010 11:36 am
>>>>
>>>> Subject: Re: Information closure
>>>>
>>>>
>>>> > I omitted relating my previous response to a model such as VSM,
>>>> > Alfredo:
>>>> > Yes, Stafford used the concept of organisational closure to
>>>> > develop
>>>> > his model, and integrated aspects of other people's work. For
>>>> > structural coupling, he used variety balancing, but restricting
>>>> > this
>>>> > (as you imply) to information and exchange of information. I am
>>>> > not
>>>> > sure whether more precise distinctions are important here -
>>>> > Stafford'sd own definitions are quite to the point - I forget  
>>>> what
>>>> >
>>>> > they are in line with the shape of your query, Alfredo. What I am
>>>> > saying is that many of the points I made in my previous message
>>>> > don't
>>>> > matter in terms of understanding VSM. I was answering more  
>>>> generally.
>>>> >
>>>> > So, I''ll go through each of your points:
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> > On 21 Mar 2010, at 10:07, Alfredo Moscardini wrote:
>>>
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