`That assumes that there is something that the physical state is /about/.`

`If I write "tamaontietoa" is it information or gibberish? Is it about`

`something? All the science of information is about encoding and`

`decoding; it is not only substrate independent, it is content independent.`

Brent

On 1/20/2024 10:23 PM, 'scerir' via Everything List wrote:

"In some respects, information is a qualitatively different sort ofentity from all others interms of which the physical sciences describe the world. It is not,for instance, a functiononly of tensor fields on spacetime (as general relativity requires allphysical quantities tobe), nor is it a quantum-mechanical observable.But in other respects, information does resemble some entities thatappear in laws ofphysics: the theory of computation, and statistical mechanics, seem torefer directly to itwithout regard to the specific media in which it is instantiated, justas conservation lawsdo for the electromagnetic four-current or the energy-momentum tensor.We call that thesubstrate-independence of information. Information can also be movedfrom one type ofmedium to another while retaining all its properties qua information.We call this itsinteroperability property; it is what makes human capabilities such aslanguage and sciencepossible, as well as biological adaptations that use symbolic codes,such as the geneticcode.Also, information is of the essence in preparation and measurement,both of which arenecessary for testing scientific theories. The output of a measurementis information; theinput of a preparation includes information, specifying an attributewith which a physicalsystem is to be prepared.All these applications of information involve abstraction, in that oneentity is representedsymbolically by another. But information is not abstract in the samesense as, say, the setof all prime numbers, for it only exists when it is physicallyinstantiated. So the lawsgoverning it, like those governing computation – but unlike thosegoverning primenumbers – are laws of physics. In this paper we conjecture what theselaws are.Also, despite being physical, information has a counter-factualcharacter: an object in aparticular physical state cannot be said to carry information unlessit could have been in adifferent state. As Weaver (1949) put it, this word ‘information’ incommunication theory relates not so much to what you *do* say, as towhat you *could* say…." D.Deutsch, Constructor Theory, ArxivIl 21/01/2024 01:28 +01 Brent Meeker <meekerbr...@gmail.com> ha scritto:The problem with this is that information, like complexity, has nophysically definite operational meaning. You can't go into the laband ask what's the information content of "this".Brent On 1/19/2024 10:46 PM, 'scerir' via Everything List wrote:Interesting quote about all that (and information)Frank Wilczek: "Information is another dimensionless quantity thatplays a large and increasing role in our description of the world.Many of the terms that arise naturally in discussions of informationhave a distinctly physical character. For example we commonly speakof density of information and flow of information. Going deeper, wefind far-reaching analogies between information and (negative)entropy, as noted already in Shannon's original work. Nowadays manydiscussions of the microphysical origin of entropy, and offoundations of statistical mechanics in general, start fromdiscussions of information and ignorance. I think it is fair to saythat there has been a unification fusing the physical quantity(negative) entropy and the conceptual quantity information. A strongformal connection between entropy and action arises through theEuclidean, imaginary-time path integral formulation of partitionfunctions. Indeed, in that framework the expectation value of theEuclideanized action essentially is the entropy. The identificationof entropy with Euclideanized action has been used, among otherthings, to motivate an algebraically simple (but deeply mysterious"derivation" of black hole entropy. If one could motivate theimaginary-time path integral directly and insightfully, rather thanindirectly through the apparatus of energy eigenvalues, Boltzmannfactors, and so forth, then one would have progressed toward thisgeneral prediction of unification: Fundamental action principles,and thus the laws of physics, will be re-interpreted as statementsabout information and its transformations."http://arxiv.org/pdf/1503.07735v1.pdf<https://l.facebook.com/l.php?u=http%3A%2F%2Farxiv.org%2Fpdf%2F1503.07735v1.pdf&h=6AQGH8JQz>Il 20/01/2024 01:10 +01 Jason Resch <jasonre...@gmail.com> ha scritto:I put together a short write up on the relationship betweenphysics, information, and computation, drawing heavily from thework of Seth Lloyd and others:https://drive.google.com/file/d/124q3ni51E3sf9kMC_sNKgP3ikcl8ou1t/view?usp=sharingI thought it might be interesting to members of this list who oftendebate whether our reality is fundamentallycomputational/informational.Jason --You received this message because you are subscribed to the GoogleGroups "Everything List" group.To unsubscribe from this group and stop receiving emails from it,send an email to everything-list+unsubscr...@googlegroups.com.To view this discussion on the web visithttps://groups.google.com/d/msgid/everything-list/CA%2BBCJUgRo-xNors%2BWZbDVpboT3QwiHC_NS24_uQ9_QkiTd3fyQ%40mail.gmail.com<https://groups.google.com/d/msgid/everything-list/CA%2BBCJUgRo-xNors%2BWZbDVpboT3QwiHC_NS24_uQ9_QkiTd3fyQ%40mail.gmail.com?utm_medium=email&utm_source=footer>.--You received this message because you are subscribed to the GoogleGroups "Everything List" group.To unsubscribe from this group and stop receiving emails from it,send an email to everything-list+unsubscr...@googlegroups.com.To view this discussion on the web visithttps://groups.google.com/d/msgid/everything-list/1890352135.1654730.1705733200088%40mail1.libero.it<https://groups.google.com/d/msgid/everything-list/1890352135.1654730.1705733200088%40mail1.libero.it?utm_medium=email&utm_source=footer>.--You received this message because you are subscribed to the GoogleGroups "Everything List" group.To unsubscribe from this group and stop receiving emails from it,send an email to everything-list+unsubscr...@googlegroups.com.To view this discussion on the web visithttps://groups.google.com/d/msgid/everything-list/bafbd2d4-e18f-4be3-93fd-ddf8145128ca%40gmail.com<https://groups.google.com/d/msgid/everything-list/bafbd2d4-e18f-4be3-93fd-ddf8145128ca%40gmail.com?utm_medium=email&utm_source=footer>.--You received this message because you are subscribed to the GoogleGroups "Everything List" group.To unsubscribe from this group and stop receiving emails from it, sendan email to everything-list+unsubscr...@googlegroups.com.To view this discussion on the web visithttps://groups.google.com/d/msgid/everything-list/1059517988.1741745.1705818185432%40mail1.libero.it<https://groups.google.com/d/msgid/everything-list/1059517988.1741745.1705818185432%40mail1.libero.it?utm_medium=email&utm_source=footer>.

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