Sorry Loet, but I just don't see the need for an observer. I do think the
difference must be by something to something (perhaps the same thing) but
Koichiro's formulation implies this. Again, I warn against unneeded
complication.
Sent from Samsung Mobile
-------- Original message --------
From: Loet Leydesdorff
Date:27/06/2015 10:00 (GMT+02:00)
To: 'Koichiro Matsuno' ,John Collier ,'fis'
Subject: RE: [Fis] It-from-Bit and information interpretation of QM
Koichiro: "In order to make them decidable or meaningful, some qualifier must
definitely be needed. A popular example of such a qualifier is a subjective
observer."
"A difference that makes a difference" for a qualifier, thus requires
specification of:
1. The first difference;
2. The second difference;
3. The qualifier (e.g., the observer).
The first difference can be measured using Shannon-type information, since a
probability distribution can be considered as a set of (first-order)
differences. Brillouin tried to specify the second difference as a ?H. ?H can
also be negative ("negentropy"). But how does one proceed to the measurement?
Best,
Loet
________________________________
Loet Leydesdorff
Emeritus University of Amsterdam
Amsterdam School of Communication Research (ASCoR)
[email protected] <mailto:[email protected]> ; http://www.leydesdorff.net/
Honorary Professor, SPRU, <http://www.sussex.ac.uk/spru/> University of Sussex;
Guest Professor Zhejiang Univ.<http://www.zju.edu.cn/english/>, Hangzhou;
Visiting Professor, ISTIC, <http://www.istic.ac.cn/Eng/brief_en.html> Beijing;
Visiting Professor, Birkbeck<http://www.bbk.ac.uk/>, University of London;
http://scholar.google.com/citations?user=ych9gNYAAAAJ&hl=en
From: Fis [mailto:[email protected]] On Behalf Of Koichiro Matsuno
Sent: Saturday, June 27, 2015 9:04 AM
To: 'John Collier'; 'fis'
Subject: Re: [Fis] It-from-Bit and information interpretation of QM
At 4:00 AM 06/27/2015, John Collier wrote:
I also see no reason that Bateson's difference that makes a difference needs to
involve meaning at either end.
[KM] Right. The phrase saying "a difference that makes a difference" must be a
prototypical example of second-order logic in that the difference appearing
both in the subject and predicate can accept quantification. Most statements
framed in second-order logic are not decidable. In order to make them
decidable or meaningful, some qualifier must definitely be needed. A popular
example of such a qualifier is a subjective observer. However, the point is
that the subjective observer is not limited to Alice or Bob in the QBist
parlance.
Koichiro
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