Karl Popper

Cieľom tohto článku nie je, primárne, rozobrať Popperovu teóriu vedy, ale 1. predstaviť Lakatosove námietky proti tejto teórii; 2. kriticky ich analyzovať z hľadiska Popperovej teórie; a 3. vysvetliť, prečo justifikacionista Lakatos nemohol oceniť Popperov skepticizmus.

Cílem této studie je představení základních tezí sociálně-politické filosofie Karla Raimunda Poppera (jak je zachycena zejména v dílech Bída historicismu a Otevřená společnost a její nepřátelé) a dále kritické zhodnocení aplikace těchto tezí při výkladu Platónovy filosofie. Je probíráno zejména Popperovo obvinění Platóna z tzv. „biologického historicismu“, dále jeho označení platónské teorie spravedlnosti jako „totalitní“ a v neposlední řadě jeho interpretace dialogu Ústava jakožto Platónova „politického programu“ určeného k přímé implementaci v praxi vyvoleným filosofem-králem. V druhé polovině této studie je (...) pak nabídnuto alternativní čtení, v němž se Platónova Ústava vyjeví ve zcela odlišném světle, než v jakém ji vidí Popper. (shrink)

We outline Karl Popper’s theory of deduction, which he developed in the 1940s. In his theory it is assumed that a consequence relation is given or otherwise constructed by postulation. Logical operations, which may be available in this consequence relation, are then characterized by means of relational definitions, and logical operators are introduced as names for these operations by means of inferential definitions. Using logically structured sentences thus introduced, the inference laws for them are immediately obtained from the inferential definitions.

Kosmologie im weiten Sinn von Naturwissenschaft und -philosophie hat Karl Popper am meisten fasziniert. Auch die physikalische Kosmologie im engeren Sinn verfolgte er kritisch. In der aktuellen Kosmologie sind seine wissenschafts- und erkenntnistheoretischen Einsichten weiterhin wichtig … oder sollten es sein – besonders im Kontext spekulativer Hypothesen, etwa zu anderen Universen.

Karl R. Popper e Raymond Aron foram dois dos mais destacados pensadores do século XX, notadamente a partir da segunda guerra mundial. Sendo o primeiro um destacado epistemólogo e filósofo político e o segundo um filósofo social e político, entre suas mais diversas obras encontramos um denominador comum, a crítica epistemológica das ciências humanas. O presente trabalho tem por objetivo investigar os possíveis pontos de contato entre os dois filósofos, bem como suas divergências. Como metodologia de estudo, nos centraremos nos (...) textos produzidos pelos autores que tenham como tema principal a epistemologia das ciências humanas. Notadamente, encontraremos em ambos uma crítica ao historicismo como fundamento das humanidades. Palavras-chave: Karl Popper, Raymond Aron, Historicismo. (shrink)

In this essay, the problem of violence, its causes, and how eternal peace in a society can be attained shall be discoursed. Violence is illegitimate torture which may be either psychological or physical. Mostly violence is the product of irrational actions which cause destruction in society. Reason is the only solution to the problem of violence. In the paper, I will use Karl Popper’s theory of Critical Rationalism to argue that rational deliberation can resolve the conflicts which often cause violence (...) in society. The practice of unreason primarily causes violence in society which is one of the gravest hindrances to human development. For example, in Pakistani society, an orthodox mind easily gets inclined toward intolerant behavior. The first and foremost aim of this thesis will be to give a proper analysis of why unreason occurs in society. Secondly, it will attempt to propose a viable solution to the problem of violence. However, it will also consider the alternative solutions presented by other theorists. In this regard, Karl popper’s theory of Critical Rationalism could be promising. Being a problem-oriented philosopher, Popper argues that societies advance through trial and error underpinning critical rationality. (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)

Cet ouvrage interroge le penser épistémologique de K.R. Popper, à la fois dans ses fondements et dans son déploiement, en posant deux questions épistémo-logiques : celle du " paradoxe méthodologique" et celle de " l'exigence d'élargissement de la formule de la croissance du savoir scientifique.".

Karl Popper’s ‘non-foundationalist’ critical rationalism had been established before Edmund Gettier came up with his analysis of knowledge. Popper’s critique of foundationalism shook the foundation of the hall mark of Western traditional epistemology as defended by Descartes, the logical empiricists and invariably Gettier. The position I am defending in this paper is that, Gettier is not correct to have presented the epistemic agent in his counterexamples as justified. I have arrived at this conclusion because it is uncritical of Smith to (...) think that ‘Jones owns a Ford car’ can be inferred from the perception of ‘Jones drives a Ford car’, without a problem. In the same manner, Smith’s belief that the testimony of a company president is basic and not questionable is faulty. The first belief ignores the fact that every perception is theory laden while the second ignores the problem of trust in testimonial knowledge. Popper just like in Yoruba epistemology subscribed to the position that observation itself is theory laden, and that is why in Yoruba epistemology propositional knowledge falls within the scope of second-hand information, which requires further personal investigation or questioning. (shrink)

El objetivo del presente trabajo es señalar algunas primeras aproximaciones a la cuestión del principio de racionalidad en el pensamiento de Karl Popper. Si bien este tema específicamente pareciera no mostrarse con precisión, (cuestión marcada por diversos autores), al menos no como lo es su propuesta falsacionista, se intentará retomar las principales notas sobre el principio de racionalidad e indicar algunas aproximaciones al debate epistemológico que surge en torno a este principio.

Falsification may demarcate science from non-science as the rational way to test the truth of hypotheses. But experimental evidence from studies of reasoning shows that people often find falsification difficult. We suggest that domain expertise may facilitate falsification. We consider new experimental data about chess experts’ hypothesis testing. The results show that chess masters were readily able to falsify their plans. They generated move sequences that falsified their plans more readily than novice players, who tended to confirm their plans. The (...) finding that experts in a domain are more likely to falsify their hypotheses has important implications for the debate about human rationality. (shrink)

Based on an analysis of ten popular introductions to social psychology, we will show that Karl Popper's philosophy of ‘critical rationalism’ so far has had little to no traceable influence on the epistemology and practice of social psychology. If Popper is quoted or mentioned in the textbooks at all, the guiding principle of ‘falsificationism’ is reduced to a mere ‘falsifiability’ and some central elements of critical rationalism are left out – those that are incompatible with positivism and inductivism. Echoing earlier (...) attempts to introduce Popper to social psychology by Paul Meehl and Tom Pettigrew, we will argue that a discussing Popper's ideas in more depth could help social psychology to move forward in view of the ‘crisis of confidence’ that has emerged recently in view of the ‘Stapel affair’ and the reports of failures to replicate social psychological experiments in high-powered replication attempts. (shrink)

It is an irony to attack a more sceptical epistemology than one's own in the name of scepticism and defend, instead, an epistemology that is positively illogical. And yet that is what Martin Gardner has done in his “A Skeptical Look at Karl Popper.”.

Popper’s Critical Rationalism presents Popper’s views on science, knowledge, and inquiry, and examines the significance and tenability of these in light of recent developments in philosophy of science, philosophy of probability, and epistemology. It develops a fresh and novel philosophical position on science, which employs key insights from Popper while rejecting other elements of his philosophy.

The way in which knowledge progresses, and especially our scientific knowledge, is by unjustified anticipations, by guesses, by tentative solutions to our problems, by conjectures. These conjectures are controlled by criticism: that is, by attempted refutations, which include severely critical tests. They may survive these tests; but they can never be positively justified: they can neither be established as certainly true nor even as 'probable'. Criticism of our conjectures is of decisive importance: by bringing out our mistakes it makes us (...) understand the difficulties of the problems which we try to solve. This is how we become better acquainted with our problem, and able to propose more mature solutions: the very refutation of a theory - that is, of a tentative solution to our problem - is always a step forward that takes us nearer the truth. And this is how we can learn from our mistakes. As we learn from our mistakes our knowledge grows, even though we may never know - that is, know for certain. Since our knowledge can grow, there can be no reason here for despair of reason. And since we can never know for certain, the can be no authority here for any claim to authority, for conceit over our knowledge, or for smugness. The essays and lectures of which this book is composed apply this thesis to many topics, ranging from problems of the philosophy and history of the physical and social sciences to historical and political problems. (shrink)

In a letter of 1932, Karl Popper described _Die beiden Grundprobleme der Erkenntnistheorie – The Two Fundamental Problems of the Theory of Knowledge_ – as ‘…a child of crises, above all of …the crisis of physics.’ Finally available in English, it is a major contribution to the philosophy of science, epistemology and twentieth century philosophy generally. The two fundamental problems of knowledge that lie at the centre of the book are the problem of induction, that although we are able to (...) observe only a limited number of particular events, science nevertheless advances unrestricted universal statements; and the problem of demarcation, which asks for a separating line between empirical science and non-science. Popper seeks to solve these two basic problems with his celebrated theory of falsifiability, arguing that the inferences made in science are not inductive but deductive; science does not start with observations and proceed to generalise them but with problems, which it attacks with bold conjectures. _The Two Fundamental Problems of the Theory of Knowledge_ is essential reading for anyone interested in Karl Popper, in the history and philosophy of science, and in the methods and theories of science itself. (shrink)

This paper considers critical rationalism under an institutional perspective. It argues that a methodology must be incentive compatible in order to prevail in scientific competition. As shown by a formal game-theoretic model of scientific competition, incentive compatibility requires quality standards that are hereditary: using high-quality research as an input must increase a researcher’s chances to produce high-quality output. Critical rationalism is incentive compatible because of the way it deals with the Duhem-Quine problem. An example from experimental economics illustrates the relevance (...) of the arguments. (shrink)

Kant and Popper. The affmity between the philosophy of Kant and the philosophy of Karl Popper has often been noted, and most decisively in Popper's own reflections on his thought. But in this work before us, Sergio Fernandes has given a cogent, comprehensive, and challenging investigation of Kant which differs from what we may call Popper's Kant while nevertheless showing Kant as very much a precursor of Popper. The investigation is directly conceptual, although Fernandes has also contributed to a novel (...) historical understanding of Kant in his reinterpretation; the novelty is the genuine result of meticulous study of texts and commentators, characterized by the author's thorough command of the epistemological issues in the philosophy of science in the 20th century as much as by his mastery of the Kantian themes of the 18th. Naturally, we may wish to understand whether Kant is relevant to Popper's philosophy of knowledge, how Popper has understood Kant, and to what extent the Popperian Kant has systematically or historically been of influence on later philosophy of science, as seen by Popper or not. (shrink)

0. Rational Rabbis aspires to make two main points, one philosophical and contemporary, the other interpretative and historical. The book’s philosophical undertaking, presented in Part I, is to develop a central insight of Karl Popper’s into a more fuller theory of rational endeavor. The book’s interpretative and main undertaking, presented in Part II, is to argue (a) that the talmudic literature bears clear witness to a tannaitic view of humanly possible intellectual achievement intriguingly akin to the theory of rationality proposed (...) in Part I, and (b) that despite appearances to the contrary, it is a voice centrally responsible for the Bavli’s halakhic discourse and project. The TR session at AAR 2002 focused on this second last claim by means of a close reading of the ‘meitivi’ sugya presented in Bavli, Berakhot 19b-20a. A detailed reading of the sugya can now be accessed at: http://jtr.lib.virginia.edu/volume4/number2/TR04_02_a01.html What follows briefly summarizes that reading and outlines its broader philosophical and hermeneutical settings. (shrink)

The present essay inserts itself in a more ambitious project, wich aim is to elucidate the empiricist commitments of the more influential twentieth century philosophers of science, including those, like Popper, who presented themselves as critics of empiricism. Such an elucidation might contribut..

Zwischen 1987 und 1994 sandte ich 20 Briefe an Karl Popper. Die meisten betrafen Fragen bezüglich seiner Antiinduktionsbeweise und seiner Wahrscheinlichkeitstheorie, einige die organisatorische und inhaltliche Vorbereitung eines Fachgesprächs mit ihm in Kenly am 22. März 1989 (worauf hier nicht eingegangen werden soll), einige schließlich ganz oder in Teilen nicht-fachliche Angelegenheiten (die im vorliegenden Bericht ebenfalls unberücksichtigt bleiben). Von Karl Popper erhielt ich in diesem Zeitraum 10 Briefe. Der bedeutendste ist sein siebter, bestehend aus drei Teilen, geschrieben am 21., 22. (...) und 23. Oktober 1992, in dem er eine Vorform jener Definition der probabilistischen Unabhängigkeit entwickelte, die er 1994 im neuen Anhang *XX der 10. Auflage seiner Logik der Forschung (LdF) der wissenschaftstheoretischen Forschergemeinde vorstellte. Der berührendste ist sein letzter, geschrieben am 26. Juli 1994, in dem er trotz Erschöpfung mit Humor schildert, wie mühselig der Druck des Anhangs *XX verlaufen ist. Mein Bericht ist zugleich chronologisch und systematisch gegliedert: die ersten, vergleichsweise wenigen Briefe, großteils 1987 geschrieben, handeln von der Induktion; der große Rest, zeitlicher Schwerpunkt 1992, beschäftigt sich mit der Wahrscheinlichkeitstheorie. Das Kapitel 1 über Induktion ist in vier Abschnitte unterteilt: 1.1 Das Popper/Miller-Argument: eine Nachkonstruktion, 1.2 Karl Poppers Brief vom 25.8.1987: Deduktive Stützung, 1.3 Karl Poppers Brief vom 29.9.1987: Nochmals zur deduktiven Stützung, 1.4 Echt induktive Stützung und Schwächung: zwei eigene Beweise. Das Kapitel 2 über Wahrscheinlichkeit ist ebenfalls in vier Abschnitte unterteilt: 2.1 Ein Mangel an Überschußgesetzen in der Logic of Scientific Discovery, 2.2 Probabilistische Unabhängigkeit, 2.3 Wahrscheinlichkeitstheorie und Wahrscheinlichkeitssemantik, 2.4 Die neue Unabhängigkeitsdefinition im Anhang *XX der LdF. (shrink)

Scientific rationalism has long been considered one of the pillars of true science. It has been one of the criteria academics have used in their efforts to categorise disciplines as scientific. Perhaps scientific rationalism acquired this privileged status because it worked relatively well within the context of the natural sciences, where it seemed to be easy to apply this kind of rationalism to the solution of natural scientific problems. However, with the split in the scientific world between the natural sciences (...) and the social sciences, the role of scientific rationalism, especially in the social sciences, becomes less clear-cut, with the ambiguous status of positivism in the social sciences making scientific rationalism more of a shaky foundation than a pillar of social science. The weaknesses inherent in scientific rationalism are most exposed within the context of anthropology, and particularly in the anthropological study of the supernatural, or supernatural beliefs. This paper will attempt to point out some of the weaknesses of scientific rationalism specifically within the context of the anthropology of the supernatural and religion. By doing so, it is hoped to show, with reference to some phenomenological ideas, that, while scientific rationalism does have its merits within anthropology, a rigid application of rationalism could become a limitation for anthropological studies of those aspects of human life that challenge Western scientific rationalism. The debate around the position of anthropology as a science or non-science is related to the issue of the role of scientific rationalism. This debate is indeed part of the history of anthropology and is as yet unresolved As such, the ideas of several earlier scholars will be referred to in an attempt to contextualise the arguments presented in this paper. Indo-Pacific Journal of Phenomenology , Volume 6, Edition 1 May 2006. (shrink)

In the first part of the paper, the author presents Popper's theory of the objective knowledge and the three worlds in ten theses with a commentary, showing difficulties and vagueness of Popper's theory and trying to clarify it. The second part comprises discussion with a few Popper's theses. The author especially argues against the thesis about autonomy of the third world, and about epistemology limited to examination of only the objects from the third world. In relation to this, the author (...) shows some defects of Popper's argumentation from Objective Knowledge. The conclusion of the article is a different interpretation and an anew formulation of Popper's theory. (shrink)

The paper approaches the topic of what a general philosophy of science could mean today from the perspective of a historical epistemology. Consequently, in a first step, the paper looks at the notion of generality in the sciences, and how it evolved over time, on the example of the life sciences. In the second part of the paper, the urgency of a general philosophy of science is located in the history of philosophy of science. Two attempts at the beginning of (...) the twentieth century are particularly highlighted: that of Karl Popper and that of Martin Heidegger. Both of them concentrate, albeit in widely different form, on the phenomenon of research as an open-ended process. This trend is even more pronounced in Gaston Bachelard’s version of a historical epistemology, whose work is taken as a point of reference for a general historical epistemology of research. The paper concludes with a plea to look, with Georges Canguilhem, at the history of the sciences as a laboratory for epistemology. (shrink)

An explicit philosophy and meta-philosophy of positivism, empiricism and popperianism is provided. Early popperianism is argued to be essentially a form of empiricism, the deviations from empiricism are traced. In contrast, the meta-philosophy and philosophy of an evolutionary naturalistic realism is developed and it is shown how the maximal conflict of this doctrine with all forms of empiricism at the meta-philosophical level both accounts for the form of its development at the philosophical level and its defense against attack from nonrealist (...) quarters. Following an earlier article on realism of similar theme (Synthese 26 (1974), 409) this paper then further explores the ramifications of a thoroughgoing realist position. (shrink)

Why is Critical Rationalism not widely accepted? The perceived need for "good reasons" sourced in inductive verification has always mired Rationalism in a seemingly insoluble infinite regress. Critical Rationalism, on the other hand, cuts the Gordian knot by simply dispensing with any kind of verficatory support. David Miller attributes the "Mainstream's" stubborn resistance to Critical Rationalism to an addiction to so-called "good reasons". This paper suggests causes of this addiction: the craving for propositions that are in some way "forced" on (...) us, our need to prioritise the criticism of propositions and the need to regulate interpersonal actions. The paper goes on to contend that Popperian corroboration is able to remove all and any need for verification. (shrink)

Although Popper rarely examined the “life of the laboratory” , some of his epistemic doctrines reveal important themes about knowledge‐acquisition in the laboratory sciences. In particular, when modern instruments are needed for exploring the subatomic realm, empirical evidence is dispositional in a Popperian sense. Evidence is defined conditionally with respect to a complex system of technological apparatus and theoretical judgments.After summarizing certain elements of Popper's epistemology , the character of observation in the laboratory sciences is explored . A conception of (...) property as capacities is then developed . This conception of property is applicable to empirical studies using modem scientific instruments, as information‐processing systems. (shrink)