Karl Popper

A methodology of science must satisfy two requirements: (i) It must be ampliative: the theories which it generates must make statements that go far beyond any data or observations that may have motivated those theories in the first place. (ii) It must be epistemically probative: it must somehow provide a warrant for believing that the theories so produced are correct, or at least partially correct, even if they can never be fully confirmed. These two requirements pull in opposite directions, and (...) attempts to specify the “scientific method” often focus on one to the exclusion of the other. On a few points there now exists something approaching a consensus. (i) Scientific hypotheses — including, particularly, statements about unobserved or unobservable entities or mechanisms — remain conjectural, no matter how frequently predictions based on those hypotheses are found to coincide with data. (ii) A good (best?) indicator of a theory’s verisimilitude is its ability to successfully predict phenomena which it was not specifically designed to predict. I discuss these ideas with particular reference to cosmological theories. (shrink)

Este trabalho tem como objetivo refletir sobre os dois problemas fundamentais da teoria do conhecimento: o problema da demarcação científica, ou problema de Kant; e o problema da indução, ou problema de Hume. O primeiro refere-se a questão acerca do critério da demarcação, isto é, que critério devemos usar para distinguir enunciados das ciências empíricas de afirmações metafísicas e pseudocientíficas. Popper afirma que Kant foi o primeiro a formular tal problema, e com ele, a demarcação científica tornou-se o problema central (...) da teoria do conhecimento. Discutiremos a solução de Kant e de Popper para essa questão. O segundo problema fundamental da teoria do conhecimento é o problema da indução, que se refere a questão a respeito da validade ou justificação das inferências indutivas nas ciências empíricas. Popper atribui a Hume a autoria dessa indagação. Discutiremos a abordagem de Hume sobre o tema e a solução de Kant e Popper para o problema da indução. (shrink)

A presente pesquisa objetiva discutir a leitura de Karl Popper sobre os escritos de Francis Bacon no que concerne ao método científico. Popper afirma que Bacon é um puro empirista, na medida em que o filósofo inglês sugere a indução como método seguro à ciência, e concebe as teorias científicas a partir da observação direta da natureza, ou seja, a partir da experiência. Mas será mesmo que Bacon pode ser considerado um puro empirista como afirma Popper? Na tentativa de responder (...) a esta questão, apresentar-se-á leituras de comentadores de Bacon para que se possa contrapor às ideias de Popper. Nossa hipótese é de que a interpretação de Popper é válida, uma vez que se baseia em preceitos lógicos, porém acreditamos que sua análise desconsidera partes das obras de Bacon que fundamentam a interpretação de que este não pode ser considerado um puro empirista. (shrink)

Durant toute sa vie intellectuelle, Karl Popper a accusé Niels Bohr d’avoir défendu des thèses subjectivistes à propos de la mécanique quantique et d’avoir introduit le concept de sujet au sein de la physique. Or, cette accusation va à l’encontre des textes de Bohr. L’objectif de cet article est de montrer que, dans sa restitution même des positions de Bohr, Popper n’a pas pris au sérieux une thèse centrale défendue par Bohr, qu’on appelle « la contextualité des phénomènes quantiques», et (...) qui a pour conséquence de modifier en profondeur l’acte de mesure et la constitution de l’objet en mécanique quantique. Nous essayons de montrer que c’est cette difficulté dans la restitution des positions de Bohr qui l’a amené à porter son accusation de subjectivisme à l’encontre de Bohr. (shrink)

Kaum einer hat die offene Gesellschaft in der politischen Philosophie des 20. Jahrhunderts so leidenschaftlich verteidigt wie Karl Popper. Sein Demokratieverstandnis ist eng gekoppelt an seine Wissenschaftstheorie und die Kritik an Platon, Hegel, Marx. Als Liberaler und sozialer Reformist wird er parteiubergreifend zum Stichwortgeber bundesdeutscher Politik seit den 70er Jahren. Popper-Rezeptionen finden sich bis in die Staatsrechtslehre (namentlich Peter Haberle) und das Bundesverfassungsgericht hinein. Noch heute lasst sich mit Popper gegen Diktaturen wie uberhaupt gegen Konzepte von "Gemeinschaft" Position beziehen - (...) aber auch gegen einen pseudo-liberalen, gnadenlosen Kapitalismus der "Ich-AGs". Mit Beitragen von Dorothea Frede, Peter Haberle, Herbert Keuth, Hubert Kiesewetter, Martin H. W. Mollers, Jurgen Nordmann, Harald Stelzer, Robert Chr. van Ooyen, Robert Zimmer. (shrink)

20. yüzyılın önemli bilim felsefecisi Lakatos'un, bilim felsefesinde getirmiş olduğu yeni bakış açısı ve yöntem tartışmasıyla ayrıcalıklı bir konumu bulunmaktadır. Bilimin yapısı ve işleyişinin anlaşılması için bilim tarihinin iyi bilinmesi gerektiği belirten düşünür, bilimsel bilginin bilimsel olmayandan ayırt edilmesi hususunda var olan bilimsellik ölçütlerine eleştiriler getirerek kendi sınır çizme ölçütünü belirlemiştir. Buna bağlı olarak Bilimsel Araştırma Programı aracılığıyla bilimsel rasyonalitenin nasıl geliştiği konusuna da açıklık getirmeye çalışmıştır. Onun düşünsel arka planında, bilim felsefesinde fikirleriyle önemli yer edinmiş Viyana Çevresi, Popper ve (...) Kuhn gibi düşünürler ve onların bilimsellik, rasyonalite gibi temel problemlere yönelik çeşitli çözüm önerileriyle geliştirdikleri kuramları bulunmaktadır. Viyana Çevresi'nin olgusal temelli doğrulamacılığa dayanan bilim anlayışına eleştiriler yönelterek, Popper'ın bilimsellik ölçütü olan yanlışlamacılığı "dogmatik", "metodolojik" ve "sofistike" yanlışlamacılık şeklinde analiz eden Lakatos, bu analizini Kuhn'un bilimsel devrimler ile geliştirdiği tarih tasarımı ile sentezlemeye çabalamıştır. Bu çalışmada, Lakatos'un bilimsel metodolojisi için öne sürdüğü yeni çözüm önerisi bağlamında kendinden önceki bilimsel görüşlere yönelik eleştirilerini incelemek, bilim anlayışının bilim felsefesi açısından önemini belirlemek ve bilimsel yöntem sorunu üzerine düşüncelerini irdelemek amaçlanmaktadır. (shrink)

The article aims at reconstruction of a importance of Popper's situational logic to his analysis of an epistemological status of evolution theory. The paper consists of four parts. In the first one I present Popper's arguments on an epistemological status of Darwinism he exposed in „The Poverty of Historicism”. In the second part I put forward Popper's views on evolution theory in the 60-th. The third part aims at outlining of his idea of situational logic. And in the last part (...) of this paper I consider philosophical significance of the idea to an epistemological status of Darwinism. (shrink)

The studies of theoretical bias in evidence are these days developed by many clever psychologists, social psychologists, and philosophers. It therefore comes as a surprise to realize that most of the material one can find in the up-to -date literature repeats discoveries which are due to the heroes of the present sketch, namely Galileo Galilei, Sir Francis Bacon, and Robert Boyle; William Whewell, Pierre Duhem, and Karl Popper. We may try to raise scholarly standards by familiarizing ourselves with their ideas (...) and studying them with a little appreciation. (shrink)

The degree of corroboration of a scientific hypothesis is an issue that has been repeatedly discussed in modern theory of sciences . In a preceding paper it was shown that the formulae advanced by Popper to calculate the degree of corroboration C are not very satisfactory because the probability values required in the computation of C are not available as a rule. Another equation to measure the degree of corroboration B was proposed ), whereby only the number n of unsuccessful (...) efforts to falsify a scientific hypothesis by means of adequate experiments or observations is needed to be known. Shortly after the publication of these ideas I discovered that Nicolaus Cusanus in his book "De docta ignorantia" had proposed a model of scientific "verisimilitude" which leads to a quite similar relationship between B and the number n of independent proofs or observations. The "polygonal" model of verisimilitude ) mentioned by Cusanus is presumably the first quantitative estimate proposed for this problem in philosophical literature. (shrink)

Analysis of how intellectual historians and sociologists of science differ.

Essays over de in Oostenrijk geboren Engelse wijsgeer (geb. 1902).

This article is a modern socratic dialogue between socrates and theaetetus presented in the "ordinary language." the discussion centers on self-Referring statements and their meaning. (staff).

Karl Popper's critique of theoretical history remains formidable but contains serious flaws. Popper held erroneous views about the practice of the natural sciences and created overly severe strictures for theoretical statements in the social sciences. General theory and general theoretical statements play a legitimate role in the social sciences. Merton has promoted middle-range theories and models and Lakatos multiple ontologies. One can answer Popper's criticisms of either the impossibility or triviality of long-term historical laws by searching for stable constellations of (...) local or middle-range laws rather than a universal law. Moreover, the successful use in the social sciences of various types of scales of measurement rather than an absolute scale shows that quantitative analysis is possible in history. Investigators need to find the boundaries, the frameworks of feasibility, in which historical trends and laws operate. Popper's maximalism plays into the irrationalist trends that he himself deplored. If historical investigators and theoreticians set appropriate goals for theoretical history, they can practice their discipline responsibly and find meanings, if not a single meaning, in history. (shrink)