Diferencia entre revisiones de «Información»

Revisión del 23:29 27 oct 2013

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Información es un término derivado del verbo latino informare que significa "dar forma a la mente", "la disciplina", "instruir", "enseñar". La información se entiende generalmente como conocimientos o hechos que uno ha adquirido. Sin embargo, en algunas áreas de la ciencia, la información se define de manera diferente ya menudo ambigua.^{[1][nota 1]}

Para la ciencia creacionista, it is information (God's word) that underlies the fine-tuning of the universe. Furthermore the existence of biological information inside every cell (DNA and RNA) provides what is perhaps the most powerful argument for intelligent design. William Dembski asserts that DNA possesses specified complexity (i.e., is both complex and specified, simultaneously) and therefore it must have been produced by an intelligent cause (i.e., that it was designed), rather than being the result of natural processes.^[2] One of the main objections to evolution is the origin of the enormous amounts of genetic information content that is needed for an organism to evolve from microbes to humans.^[3] Not only has no credible source been identified where information could be produced by natural processes, but in contrast the adaptation of living organism involves a reduction of the information in the genome through natural selection.^[4]

Definiciones o caracterizaciones

La palabra "información" se utiliza de muchas maneras. Hemos mencionado el sentido de la persona laica arriba, pero también se utiliza una secuencia de símbolos (como letras de un idioma (ver foto a la derecha), puntos y rayas del código Morse, o la disposición de los golpes de Braille) que transmiten significado. Otra forma en que se utiliza el término es en teoría de la comunicación, y la compresión de mensajes. Se trata principalmente de los dos últimos de los sentidos que se analizan en este artículo.

Royal Truman, en su análisis publicada en el Journal of Creation analiza dos familias de enfoques: La primera derivada del trabajo de Shannon y la segunda derivada de la obra de Gitt.^[5] Truman también menciona la definición algorítmica de la información, desarrollada por Solomonoff, Kolmogorov y con contribuciones de Gregory Chaitin pero que no ha sido discutida en su artículo.^[5] De acuerdo con Stephen Meyer, Los científicos suelen distinguir dos tipos básicos de información: la información significativa o funcional y la llamada información de Shannon^[6] (llamado así por Claude Shannon, quien desarrolló la teoría de la información estadística). La información de Shannon no es realmente lo mismo que la información significativa. Información significativa, codificada en un lenguaje, se puede medir estadísticamente, por Shannon, pero la medida es la redundancia de los símbolos, la denominada entropía de Shannon,^{[nota 2]} no es una medida del "contenido de información", o el significado. Shannon, por ejemplo, se puede utiliza para medir el "contenido de información" de un conjunto de símbolos al azar que no tienen ningún significado.

Information is often not defined.^[7] Some definitions relate the concept of information to meaning. In turn, the meaning of "meaning" has never been properly explained when applied to human thought processes.^[8] Some definitions, characterizations or notions about information are found in the literature or on the web but without consensus. Some of these are:

Robert M. Losee;

Winfried Nöth;

Ray Kurzweil;

Gregory Bateson;

Valdemar W.Setzer^{[nota 3]}

Wikipedia;

Answer of some of those present in the lectures of Stephen Talbott to a large audience of librarians;

Views

Teoría de la información

Una definición clara del concepto de "información" no se puede encontrar en los libros de teoría de la información.^[15] Gibbs propone, en este contexto, una definición simple: ”la información (I) es la cantidad de los datos después de la compresión de datos”.^[15] Para Shannon, los aspectos semánticos de la comunicación son irrelevantes para el problema de ingeniería y el aspecto significativo es que el mensaje real es una recogida de un conjunto de posibles mensajes.^[16] De acuerdo con J. Z. Young, el concepto de la información en un sistema, de acuerdo a Shannon, puede ser definido como la característica de la misma que permanece invariante bajo re-codificación.^[17]

Semiótica

Tanto la teoría de la información como la semiótica estudian la información, pero debido a su enfoque estrictamente cuantitativo, la teoría de información tiene un alcance más limitado.^[10] En la semiótica, el concepto de información se relaciona con los signos. Un signo es algo que puede ser interpretado como teniendo un significado, distinto de sí mismo, y por lo tanto un vehículo de información a uno capaz de decodificar esta señal. Los signos pueden ser considerados en términos de niveles interdependientes: la pragmática, semántica, sintaxis, y el nivel empírico.

Dr. Werner Gitt propone conceptualmente cinco diferentes niveles de información^[18]:

According Dr. Gitt, there is no known law through which matter can give rise to information.^[18] In his article on scientific laws of information, published in the Journal of Creation, Dr. Gitt states that information is not a property of matter, it is a non-material entity so its origin is in the same way not explicable by material processes.^[19] Dr. Gitt also points out that the most important prerequisite for the production of information is the sender's own will, so that information can arises only through will encompassing intention and purpose.^[19] Gitt also points out that as information is neither formed of matter (although it can be carried on matter) nor energy, it constitutes a third fundamental quantity of the universe.

Biology

It is generally accepted that the meaning of information given by Claude Shannon in his theory of mathematical information is relevant and legitimate in many areas of biology but in recent decades, and even before, many biologists have applied informational concepts in a broader sense. They see most basic processes characteristic of living organisms being understood in terms of the expression of information, the execution of programs, and the interpretation of codes.^[20] John von Neumann stated that the genes themselves are clearly parts of a digital system of components.^[21] Many biologists, especially materialists, see this trend as a having foundational problems.^[20]

Either way, many scientists in various fields of science consider living organisms as having biological information. Gregory Chaitin, a renowned Argentine-American mathematician and computer scientist, sees DNA as a computer program for calculating the organism and the relationship between male and female as a way of transmission of biological information from the first to the last.^[22] David Baltimore, an American biologist and Nobel laureate, stated that "Modern Biology is a science of information".^[23] Edmund Jack Ambrose, quoted by Davis and Kenyon, said that "There is a message if the order of bases in DNA can be translated by the cell into some vital activity necessary for survival or reproduction". ^[24] Richard Dawkins, a British ethologist and evolutionary biologist, has written that life itself is the flow of a river of DNA which he also denominates a river of information.^[25] Stephen Meyer points out that producing organismal form requires the generation of information in Shannon's sense. But he goes further to observe that "like meaningful sentences or lines of computer code, genes and proteins are also specified with respect to function."^[26] Meyer points out that the information contained in the DNA has a high degree of specificity. David Berlinski an American philosopher, educator, and author, also draws a parallel between biology and information theory. In his book "The Deniable Darwin & Other Essays" he stated that:

The intelligent design concept that DNA exhibited specified complexity was developed by mathematician and philosopher William Dembski. Dembski claims that when something exhibits specified complexity (i.e., is both complex and specified, simultaneously) one can infer that it was produced by an intelligent cause (i.e., that it was designed), rather than being the result of natural processes (see naturalism).^[2] He provides the following examples: "A single letter of the alphabet is specified without being complex. A long sentence of random letters is complex without being specified. A Shakespearean sonnet is both complex and specified."^[28] He states that details of living things can be similarly characterized, especially the "patterns" of molecular sequences in functional biological molecules such as DNA.^[2]

Dembski defines a probability of 1 in 10¹⁵⁰ as the "universal probability bound". Its value corresponds to the inverse of the upper limit of "the total number of possible specified events throughout cosmic history," as calculated by Dembski. He defines complex specified information (CSI) as specified information with a probability less than this limit. (The terms "specified complexity" and "complex specified information" are used interchangeably.) He argues that CSI cannot be generated by the only known natural mechanisms of physical law and chance, or by their combination. He argues that this is so because laws can only shift around or lose information, but do not produce it, and chance can produce complex unspecified information, or non-complex specified information, but not CSI; he provides a mathematical analysis that he asserts demonstrates that law and chance working together cannot generate CSI, either. Dembski and other proponents of ID contend that CSI is best explained as being due to an intelligent cause and is therefore a reliable indicator of design.^[29]

Quantifying information

David Salomon states: "Information seems to be one of those entities that cannot be precisely defined, cannot be quantified, and cannot be dealt rigorously".^[30] Salomon went on to say, however, that in the field of information theory, information can be treated quantitatively.^[30]

Shannon entropy

In A Mathematical Theory of Communication Shannon endows the term information not only with technical significance, but also for measure.^[31] Shannon theorized the idea of quantitative measure of information and defined a quantity called self-information.^[32] The self-information, denoted by i, associated with an event A is given by:

i(A) = -log_bP(A)

where P(A) is the probability that the event A will occur and b is the chosen base of the log. If the unit of information is bits, we use b=2 and so on.^[32]

The measurement of information, in mathematical terms, has to consider the number of signals, their probability, and combinatorial restrictions.^[10] The amount of information transmitted by a signal increases the more it is their rarity, and the more frequent is a signal, less information it transmits.^[10] Is worth noting that while we can quantify the probability of any given symbol, we can use no absolute number for the information content of a given message.^[33]

Chaitin-Kolmogoroff theory

Another way of measuring information content is the Kolmogorov complexity (also known as Chaitin information). The Kolmogorov complexity of a string is the length of the shortest possible description of the string in some fixed universal description language (like the Turing machine). Let x be a binary string and let d(x) be the shortest string <M, i> achieved by concatenating a Turing machine M and an input i to which the Turing machine halts, leaving the string x on the tape.^[34] The Kolmogorov complexity K(x) is:

K(x) = |d(x)|

that means, the Kolmogorov complexity is the length of the minimal description of x.^[34] The complexity can be viewed as the measure of the "patternlessness" of the sequence, and can be equate with the idea of randomness.^[35] The length of the shortest description will depend on the choice of description language. By way of illustration we compare two strings:

"CREATIONWIKICREATIONWIKICREATIONWIKICREATIONWIKICREATIONWIKICREATIONWIKICREATIONWIKI" 

and

"7W7JAHAGLKJHGBNMZCXVSFQP92725FFADSHALKJNMZAQWSXPLÇKJHGTRFOUMSVAXZXCTEÇALSKDJFHGBEOQI" 

Both strings have the same number of letters but the former can be represented in a more compact way: "7 x 'CREATIONWIKI". Another way to represent the first sequence is using a language such as this Pascal-like:

for i:=1 to m


This program contains 34 ASCII characters (counting the blanks and new line) plus 1 character (the parameter: 7) (the value of the variable m in this particular case). For other values of m the program length in characters will be 34 + log m. One way to measure the randomness of the former sequence is to form the ratio of program length to string length.^[36] This results in the measure of the randomness of:

r ≤ (34 + log m)/(12m)

Similarly to the previous case (Shannon), the Kolmogorov complexity can't measure the meaning of information. In fact, it measures the compressibility of a given sequence.

Spontaneous appearance

A very impressive sand castle on the beach near St Helier in Jersey.

Manfred Eigen, Bernd Olaf-Küppers and John Maynard Smith and many other biologists have stated that the origin of information is biology's central problem.^[23] Some, like Manfred Eigen argue that it is possible for the spontaneous, stochastic, emergence of information out of chaos.^[37] In his book Steps Towards Life Eigen states what he regards as the central problem faced in origins of life research: "Our task is to find an algorithm, a natural law that leads to the origin of information".^{[38][nota 5]} A. E. Wilder-Smith, in contrast, states that

Wilder-Smith establishes a distinction between actual and potential information. The former can never be synthesized by stochastic processes, while the latter might be. He establishes a comparison between actual information and negentropy^{[nota 6]} and, on the other side, a correspondence between potential information and entropy.^[37] Wilder-Smith proposes a simple example that clarifies the distinction between potential and actual information. The potential to make pictures out of a large amount of randomly distributed dots is infinite although a set of randomly distributed dots will not show in reality an image that looks like something (e.g., a bicycle). The points randomly distributed do possess the capacity for endless amounts of information, but do not communicate any by themselves, so, indeed, there's no actual information.^[37]

Lester and Bohlin also agree with Wilder-Smith. They point out that several authors in recent years have established a connection between the genetic code present in DNA and information theory. The overall conclusion of their studies is that information cannot arise spontaneously by mechanistic processes.^[39]

In his book A Case Against Accident and Self-Organization, Dean L. Overman builds a compelling case that life is no accident. It is not possible to bring the entire argument of the book here. Overman poses that a central distinction between living and non-living matter is the existence of a genome or a composite of genetic messages which carry enough information content to replicate and maintain the organism.^[40] The information contained in the genetic code, like any information or message, is not made of matter. The meaning of the genetic code can not be reduced to a physical or chemical property.^[40] Information content is the minimum number of instructions necessary to specify the structure and, in living systems, information content requires an enormous amount of specified instructions.^[40] According to Overman, many have proposed calculations for the probability of complex organic compounds such as enzymes, proteins or DNA molecules emerge by chance. Many have concluded that this probability is extremely low, virtually an impossibility.^{[40][nota 7]}

Evolutionist Michael Denton wrote the controversial book "Evolution: A Theory in Crisis". In his book, writing about the origin of life, Denton states:

Due to the enormous odds against abiogenesis on earth some scientists have turned to the panspermia hypothesis, the belief that life started off this planet. Among these scientists are Francis Crick, Fred Hoyle, Svante Arrhenius, Leslie Orgel and Thomas Gold.^[40][42]

Problem for evolution

According to Jonathan Sarfati, the main scientific objection to evolution is not whether changes, whatever their extent, occur through time. The key issue is the origin of the enormous amount of genetic that is needed in order for a microbe to evolve, ultimately reaching the complexity of humans.^[43] Dr. Lee Spetner points out that in living organisms, adaptation often take place by reducing the information in the genome and notes that the vertebrate eye or its immune system could never have evolved by loss of information alone.^[44]

Notas

1. ↑ Dr. Imre Simon, quien hizo esta referencia, fue un conocido matemático y científico de la computación brasileño nacido en Hungría.
2. ↑ Entropía de Shannon es la imprevisibilidad media en una variable aleatoria, que es equivalente a su contenido de información.
3. ↑ Dr. Valdemar W.Setzer is a well-known Brazilian computer scientist. He is is a signatory to the list named "A Scientific Dissent From Darwinism". Found in: Plantilla:Cite web
4. ↑ The term "apobetics" was introduced by Dr. Werner Gitt in 1981 to express the teleological aspect of information, the question of purpose. The word is derived from the Plantilla:Greek Name that means result, success, conclusion, consequence. Found in Plantilla:Cite book
5. ↑ The Eigen's book quoted by Dembski is Plantilla:Cite book
6. ↑ Negentropy, also negative entropy or syntropy of a living system is the entropy that it exports to keep its own entropy low.
7. ↑ Sir Fred Hoyle and Chandra Wickramasinghe calculated the probability of appearance of the different enzymes forming in one place at one time to produce a single bacterium in 1 in 10^40,000. Hubert Yockey calculated the probability for the appearance of the iso-l-cytochrome c at random as being 2 x 10^-44. Walter L. Bradley and Charles B. Thaxton calculated the probability of a random formation of amino acids into a protein as being 4.9 x 10^-191. Harold Morrison obtained in his calculations the impressive number of 1 in 10^{100,000,000,000} for a single celled bacterium to develop from accidental or chance processes. As quoted by Overman in the book: Plantilla:Cite book

Referencias

1. ↑ Simon, Imre. «MAC 333 - A Revolução Digital e a Sociedade do Conhecimento - Tema 11 - O que é Informação? Como ela age?». Consultado el 31 de julio 2013.
2. ↑ ^{2,0 2,1 2,2} Dembski, William A. Intelligent Design as a Theory of Information Access Research Network, November 15 1998.
3. ↑ Plantilla:Cite book
4. ↑ Plantilla:Cite book
5. ↑ ^{5,0 5,1} Truman, Royal (2012). «Information Theory-Part 1:Overview of Key Ideas». Journal of Creation 26 (3):  p. 101-106. ISSN 1036-2916. 
6. ↑ Meyer, Stephen C (2013). Darwin's Doubt: The Explosive Origin of Animal Life and the Case for Intelligent Design. Seattle, WA: HarperOne/HarperCollins Publishers. p. 164-168. ISBN 978-0-06-207147-7. 
7. ↑ Plantilla:Cite web
8. ↑ Plantilla:Cite book
9. ↑ Plantilla:Cite journal
10. ↑ ^{10,0 10,1 10,2 10,3} Plantilla:Cite book
11. ↑ Plantilla:Cite book
12. ↑ Plantilla:Cite web
13. ↑ ^{13,0 13,1} Plantilla:Cite web
14. ↑ Plantilla:Cite web
15. ↑ ^{15,0 15,1} Lin, Shu-Kun (2008). «Gibbs Paradox and the Concepts of Information, Symmetry, Similarity and Their Relationship». Entropy 10 (1):  p. 1-5. http://www.mdpi.com/1099-4300/10/1/1. 
16. ↑ Shannon, Claude E.; Weaver, Warren (1949). The Mathematical Theory of Communication. Illinois: Illini Books. p. 1. Library of Congress Catalog Card nº 49-11922. http://cm.bell-labs.com/cm/ms/what/shannonday/shannon1948.pdf. 
17. ↑ Young, J. Z (1963). «Memory, Heredity and Information». En Huxley, Julian; Hardy, A. C.; Ford, E. B. Evolution as a Process (2ª edición). New York, N. Y.: Collier Books. p. 326-346. 
18. ↑ ^{18,0 18,1 18,2 18,3 18,4 18,5 18,6} Gitt, Werner (2005). In the Beginning was Information: A Scientist Explains the Incredible Design in Nature. Green Forest, AR: Master Books. p. 49-87. ISBN 978-0-89051-461-0. 
19. ↑ ^{19,0 19,1} Plantilla:Cite journal
20. ↑ ^{20,0 20,1} Plantilla:Cite web
21. ↑ Plantilla:Cite book
22. ↑ Plantilla:Cite book
23. ↑ ^{23,0 23,1} Plantilla:Cite book
24. ↑ Plantilla:Cite book
25. ↑ Plantilla:Cite book
26. ↑ Plantilla:Cite book
27. ↑ Plantilla:Cite book
28. ↑ Dembski, William A.Explaining Specified Complexity Appeared as Metaviews 139 (www.meta-list.org). September 13 1999.
29. ↑ Dembski, William A. No Free Lunch: Why Specified Complexity Cannot Be Purchased without Intelligence. 2001, Rowman & Littlefield Publishers Inc., ISBN 0742512975>
30. ↑ ^{30,0 30,1} Plantilla:Cite book
31. ↑ Plantilla:Cite book
32. ↑ ^{32,0 32,1} Plantilla:Cite book
33. ↑ Plantilla:Cite book
34. ↑ ^{34,0 34,1} Plantilla:Cite book
35. ↑ Plantilla:Cite book
36. ↑ Plantilla:Cite book
37. ↑ ^{37,0 37,1 37,2 37,3} Plantilla:Cite book
38. ↑ Plantilla:Cite book
39. ↑ Plantilla:Cite book
40. ↑ ^{40,0 40,1 40,2 40,3 40,4} Plantilla:Cite book
41. ↑ Plantilla:Cite book
42. ↑ Plantilla:Cite book
43. ↑ Plantilla:Cite book
44. ↑ Plantilla:Cite book

Enlaces externos

• Plantilla:Cite journal
• Plantilla:Cite journal
• Luciano Floridi, (2005). 'Semantic Conceptions of Information', The Stanford Encyclopedia of Philosophy (Winter 2005 Edition), Edward N. Zalta (ed.). Available online at Stanford University
• Information as a Verb: Re-conceptualizing Information for Cognitive and Ecological Models by David G. Casagrande.
• Biological Information at Stanford Encyclopedia of Philosophy
• Information at A Storehouse of Knowledge.

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