Karl Popper

In his magnum opus, The Logic of Scientific Discovery (first published in German in 1934, English translation, 1959), Karl Popper make two fundamental philosophical moves. First, he relocates the center of gravity of the philosophical treatment of science around what he calls the problem of demarcation. This is the problem of distinguishing between science, on the one hand, and everything else on the other. (By contrast, his contemporaries of the Vienna Circle, whose positivism would prove the most influential brand of (...) empiricism of the day, located the center of gravity around the problem of linguistic meaning, and use a criterion according to which a statement is meaningful to the extent that one can identify verification conditions for it.) Popper excludes from science such things as logic, metaphysics, Freudian psychoanalysis, and Marx’s theory of history. Second, Popper propounds the doctrine of falsification, which handles the problem of demarcation, as well as answers David Hume’s shattering attack on science as the premier form of knowledge centuries before. The arguments he mounts for falsification would function also as an attack on any account of the scientific enterprise that, like positivism, adheres to the idea that science progresses logically from instances (given in observation or experience) to the high-order generalizations characteristic of mature scientific theory. In this small space I shall undertake neither to illuminate the nuances of Popper’s position, nor to trace the (numerous) lines of criticism that have accumulated against it some seventy years later. I shall busy myself instead with tracing a trajectory of thought on the subject of scientific reasoning and its relation to individual decision-making, reflecting on Popper’s contribution and on how his legacy might be further enlarged. (shrink)

Epistemology is often a problem for libertarianism. Many libertarian texts assume that they need to do more than explain and defend the libertarian conjecture. Instead, they try to offer epistemological support for it (whether empirically or morally); which falsificationism and, more broadly, critical rationalism explains is not possible. Moreover, they often mistake this attempt at support for an explanation of libertarianism (which ought to include an abstract theory of liberty and how it relates to liberty in practice). Therefore, when a (...) criticism of falsificationism appears on a libertarian website it seems useful to reply to it (even though no discussion of libertarianism itself is involved). (shrink)

According to Karl Popper, science cannot verify its theories empirically, but it can falsify them, and that suffices to account for scientific progress. For Popper, a law or theory remains a pure conjecture, probability equal to zero, however massively corroborated empirically it may be. But it does just seem to be the case that science does verify empirically laws and theories. We trust our lives to such verifications when we fly in aeroplanes, cross bridges and take modern medicines. We can (...) do some justice to this apparent capacity of science to verify if we make a number of improvements to Popper’s philosophy of science. The key step is to recognize that physics, in accepting unified theories only, thereby makes a big metaphysical assumption about the nature of the universe. The outcome is a conception of scientific method which facilitates the criticism and improvement of metaphysical assumptions of physics. This view provides, not verification, but a perfect simulacrum of verification indistinguishable from the real thing. (shrink)

Friedrich Hayek was a fervent advocate of the methodological specificity of the social sciences. However, given his contact with Karl Popper, several historians and philosophers have characterised his final position as Popperian, that is, a position that would have accepted the unity of the scientific method. A closer look at Hayek's philosophy and Popper's own intellectual course shows that such a thesis is based on some misconceptions that can be overcome by taking the Hayekian concept of 'spontaneous order' as the (...) foundation of a methodology immune to any kind of methodological monism, and focusing on Popper's late works that reveal a loosening of his defense of methodological unity. (shrink)

Un domeniu, practică, sau set de cunoştinţe, ar putea în mod rezonabil să fie numit pseudoştiinţă atunci când este prezentat ca fiind în conformitate cu normele de cercetare ştiinţifică, dar din punctul de vedere al demonstraţiei nu respectă aceste norme. Karl Popper a declarat că nu este suficient să se facă distincţia între ştiinţă şi pseudoştiinţă, sau metafizică, prin criteriul de aderare riguroasă la metoda empirică, care este în esenţă inductivă, bazată pe observare sau experimentare. El a propus o metodă (...) de a distinge între metode empirice autentic, nonempirice sau chiar pseudoempirice. (shrink)

Philosophers have long tried to understand scientific change in terms of a dynamics of revision within ‘theoretical frameworks,’ ‘disciplinary matrices,’ ‘scientific paradigms’ or ‘conceptual schemes.’ No-one, however, has made clear precisely how one might model such a conceptual scheme, nor what form change dynamics within such a structure could be expected to take. In this paper we take some first steps in applying network theory to the issue, modeling conceptual schemes as simple networks and the dynamics of change as cascades (...) on those networks. The results allow a new understanding of two traditional approaches—Popper and Kuhn—as well as introducing the intriguing prospect of viewing scientific change using the metaphor of selforganizing criticality. (shrink)

Karl Popper, ca raționalist critic, a fost un oponent al tuturor formelor de scepticism, convenționalism și relativism în știință. Multe dintre argumentele sale sunt îndreptate împotriva membrilor "Cercului Vienez". Popper este de acord cu aceștia cu privire la aspectele generale ale metodologiei științifice și neîncrederea lor în metodologia filosofică tradițională, dar soluțiile sale au fost semnificativ diferite. A contribuit semnificativ la dezbaterile privind metodologia științifică generală, demarcarea științei de pseudoștiință, natura probabilității și metodologia științelor sociale. DOI: 10.13140/RG.2.2.27356.85127/1 .

In this paper I defend the claim that Paul Feyerabend held a robust metaphilosophical position for most of his philosophical career. This position I call Decision-Based Epistemology and reconstruct it in terms of three key components: a form of epistemic voluntarism concerning the justification of philosophical positions and a behaviorist account of philosophical beliefs, which allows him to cast normative arguments concerning philosophical beliefs in scientific methodology, such as realism, in terms of means-ends relations. I then introduce non-naturalist and naturalist (...) variants of his conception of normativity, which I trace back to his mentors Viktor Kraft and Karl Popper, respectively. This distinction, introduced on the metaphilosophical level, can can be put to use to explain key changes in Feyerabend’s philosophical proposals, such as the viability of his methodological argument for realism. I conclude that this Decision-Based Epistemology should be further explored by historically embedding Feyerabend’s metaphilosophy in a voluntarist tradition of scientific philosophy. (shrink)

In recent years, the full text of papers are increasingly available electronically which opens up the possibility of quantitatively investigating citation contexts in more detail. In this study, we introduce a new form of citation analysis, which we call citation concept analysis (CCA). CCA is intended to reveal the cognitive impact certain concepts—published in a highly-cited landmark publication—have on the citing authors. It counts the number of times the concepts are mentioned (cited) in the citation context of citing publications. We (...) demonstrate the method using three classical highly cited books: (1) The structure of scientific revolutions by Thomas S. Kuhn, (2) The logic of scientific discovery—Logik der Forschung: Zur Erkenntnistheorie der modernen Naturwissenschaft in German—, and (3) Conjectures and refutations: the growth of scientific knowledge by Karl R. Popper. It is not surprising—as our results show—that Kuhn’s “paradigm” concept seems to have had a significant impact. What is surprising is that our results indicate a much larger impact of the concept “paradigm” than Kuhn’s other concepts, e.g., “scientific revolution”. The paradigm concept accounts for about 40% of the concept-related citations to Kuhn’s work, and its impact is resilient across all disciplines and over time. With respect to Popper, “falsification” is the most used concept derived from his books. Falsification is the cornerstone of Popper’s critical rationalism. (shrink)

We examine the sub-field of philosophy of science using a new method developed in information science, Referenced Publication Years Spectroscopy (RPYS). RPYS allows us to identify peak years in citations in a field, which promises to help scholars identify the key contributions to a field, and revolutionary discoveries in a field. We discovered that philosophy of science, a sub-field in the humanities, differs significantly from other fields examined with this method. Books play a more important role in philosophy of science (...) than in the sciences. Further, Einstein’s famous 1905 papers created a citation peak in the philosophy of science literature. But rather than being a contribution to the philosophy of science, their importance lies in the fact that they are revolutionary contributions to physics with important implications for philosophy of science. (shrink)

Karl Popper’s critique of idealism manifests itself with the application of his method, falsificationism, to metaphysics, epistemology, and social and political philosophy. According to Popper, who identifies himself as a philosophical realist, idealism has emerged as a result of the idea that reality cannot be known by reason and of the search for certainty which is erroneous, and it has begotten two mistaken and detrimental views. These views are historicism, the notion that history has an irresistible course, and holism, the (...) notion that social wholes are organic structures that amount to more than the individuals constituting them. Historicism and holism have become the philosophical underpinnings of closed societies throughout history, such as the totalitarian regimes of the 20th century. Therefore, with a practical leaning, Popper actually takes aim at these pernicious consequences of idealism while criticizing it. In this study, idealism and the contours of Popper’s philosophy are examined, and then Popper’s metaphysical, epistemological, social, and political critiques against idealism are investigated. Keywords: Karl Popper, idealism, historicism, holism, falsificationism. (shrink)

Poppers doppelter Falsifikationismus führt dazu, daß der Kritische Rationalismus nicht als die Metatheorie der empirischen Sozialwissenschaften angesehen werden kann. Außerdem ist in diesem Ansatz die logische Asymmetrie von Verifikation und Falsifikation nicht realisiert.

Die Frage der Erhaltung der Parität bei der Wechselwirkung von Elementarteilchen, der Vorschlag ihrer Verletzung, die experimentelle Bestätigung dieses Vorschlags und die daraus sich ergebenden Folgerungen, die zur Formulierung der mathematischen Struktur der schwachen Wechselwirkungen führten, sind die wichtigsten Entwicklungen in der Elementarteilchenphysik während der Periode von 1953 bis 1958. Vorliegender Aufsatz versucht die rationale Rekonstruktion dieser Periode und des Forschungsprogrammes, welches als eines der progressivsten Programme der modernen Physik angesehen wird. Hierzu benutzen wir eine modifizierte Fassung von Poppers tetradischem (...) Schema als auch die Bemerkungen von Lakatos über gewisse Aspekte der Methodologie von Forschungsprogrammen. Es wird unterstrichen, daß die Dynamik der positiven Heuristik derart war, daß die theoretische Forschung fortgeführt werden konnte, trotz experimenteller Resultate, die nur als Gegenbeweise gegen die vorgeschlagene Struktur der schwachen Wechselwirkungen angesehen werden konnten. (shrink)

Gemeinsamkeiten und Unterschiede in den Interpretationen von Ludwig und Popper werden aufgezeigt. Daß überhaupt Unterschiede festzustellen sind, erscheint zunächst verwunderlich, da zum einen von verschiedenen Autoren eine enge Korrelation zwischen Interpretationen der Quantenmechanik und Wahrscheinlichkeitsinterpretationen behauptet wird, zum anderen aber Ludwigs Chancengewichtungen als propensities im Sinne Poppers interpretiert werden können. Es zeigt sich, daß die Unterschiede in den Interpretationen der Quantenmechanik auf Unterschieden in dem jeweils verwendeten wahrscheinlichkeitstheoretischen Formalismus beruhen, die jedoch für die Möglichkeit, Chancengewichtungen als propensities zu interpretieren, ohne (...) Bedeutung sind. (shrink)

In this article we interlink the philosophical ideas of Ernst Schumacher and Karl Popper within the framework of planning and management, describe project management cases implemented using the principles of project cycle management and study whether the success or failure can be attributed to following these concepts.We consider two basic concepts for perceiving the world surrounding us: the concept of organisation and that of self-organisation. The former emphasises the predictability of the future, where the results of each activity are predetermined (...) and can always be achieved through thorough analytical planning. The latter sees the world as a generic whole where numerous interactions take place simultaneously, leaving the future unknown. As it has been shown, for example, by Schumacher, Hayek and Popper, the real world is uncertain and orders of great complexity appear spontaneously in a self-organised manner.Mankind has thus to cope with the self-organising world and to plan and manage therein. PCM is one of the most widespread contemporary management techniques used for that purpose in both the private and public sectors. However, PCM lacks a proper theoretical basis as well as philosophical framework. We have proposed elsewhere that the concept of piecemeal social engineering elaborated by Popper in his The Poverty of Historicism could serve as a theoreticalbasis, which can combine the organisational nature of planning and the self-organising and fuzzy world.Thus the task is mentally to split the planning and implementation issue: to take the whole into pieces and rearrange them in a desired manner in the planning phase. The actual implementation of the plan ought to be conducted following a stepwise approach, re-planning all through the process. “The future cannot be forecast, but it can be explored.” Not allhuman actions are unpredictable, but we cannot be sure what the results would be or judge the value of an action based on its inclusion in some plan. (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)

What could be the motives for producing a Popperian half‐life such as the present volume? This work, which takes Karl Popper right up to his debut on the world stage with the assumption of his position at the London School of Economics, displays no inclination to follow up with the complementary second half of Popper's life sometime in the future. Indeed, the author admits that the omitted subsequent “public Popper” was frequently an embarrassment. Here is truncation with a purpose: this (...) book is written to recommend the work of the early Popper to the “academic left” and to “historiciz[e] the postmodern predicament [as] an antidote to current false consciousness” . Since this is a work in social/political theory masquerading as biography, I shall respond in kind.There have recently been a spate of attempts to revisit the major figures of the philosophy of science in the twentieth century, primarily for the purpose of explaining to ourselves what it was that provoked such an efflorescence of ingenuity, only to result in the subsequent letdown we now confront or enjoy: Cartwright et al. on Neurath, Fuller on Kuhn, and Kadvany on Lakatos. Malachi Hacohen admits that this constitutes his motive as well: he is impressed with the early Popper's political leftism and anti‐foundationalism, regarding the later Cold Warrior as a sad retrogression. It seems to me, however, that he has missed the major lesson of all these retrospectives. Crudely, what emerges from these exercises, as a group, is the thesis that the looming significance in general intellectual discourse of philosophers of science in the mid‐twentieth century was due to the fact that they were doing social theory all along under the guise of describing Science. Furthermore, their question of the true nature of legitimate Science was seen as a crucial preliminary to understanding which politico‐economic system would come to dominate in the Great Depression, World War II, and the Cold War.From this perspective, I strongly doubt that Popper's social significance ever derived from his durable “solution” of any pressing philosophical problems: Did he really proffer a usable “demarcation criterion” for science, or rectify the problem of induction, or adequately describe probabilities as propensities, or banish “subjectivism” from physics, or even really demonstrate that Marxism was untestable? No, during the Cold War it turned out that the very best apologists for Western society were leftists and anti‐foundationalists; and one can observe this in the history of postwar social sciences like economics and psychology, as well as the philosophy of science. Kuhn et al. then took the next logical step in the sequence: something like “critical rationalism” was widely deemed a thoroughly implausible account of social organization in an anti‐foundationalist context . Social order had to be reconceptualized and reimposed, be it through “normal science,” “progressive research programs,” or whatever.Hence, banishing the half‐life of the Cold Warrior from the biographical account is to parade a pointless Popper in a plotless Punch‐and‐Judy show. Hacohen rightly cautions the reader about the unreliability of Popper's autobiography Unended Quest, but he should have taken more to heart Popper's assertions therein that although he knew almost no social theory, that didn't prevent him from seeking to dictate good “scientific method” to the social sciences ; and furthermore, that his vaunted method of “situational analysis” was little more than a repackaging of neoclassical economics as a general methodology for the social sciences . Thus when Hacohen proposes “situational logic” as a template for his historiography, is he sufficiently aware that he is merely participating in the general movement to extend neoclassical economics as a Theory of Everything for our contemporary globalized situation? If the purpose really was to demonstrate that Popper was situatedly rational, there would be no pressing need to write a biography; one could just as well fit his data to a generic maximization model. History should make us rather more self‐conscious about our scholarly and political options, not less. (shrink)

This paper is a critique of ‘integrative medicine’ as an ideal of medical progress on the grounds that it fails to realise the cognitive value of alternative medicine. After a brief account of the cognitive value of alternative medicine, I outline the form of ‘integrative medicine’ defended by the late Stephen Straus, former director of the US National Centre for Complementary and Alternative Medicine. Straus’ account is then considered in the light of Zuzana Parusnikova’s recent criticism of ‘integrative medicine’ and (...) her distinction between ‘cognitive’ and ‘opportunistic’ engagement with alternative medicine. Parusnikova warns that the medical establishment is guilty of ‘dogmatism’ and proposes that one can usefully invoke Karl Popper’s ‘critical rationalism’ as an antidote. Using the example of Straus, I argue that an appeal to Popper is insufficient, on the grounds that ‘integrative medicine’ can class as a form of cognitively-productive, critical engagement. I suggest that Parusnikova’s appeal to Popper should be augmented with Paul Feyerabend’s emphasis upon the role of ‘radical alternatives’ in maximising criticism. ‘Integrative medicine’ fails to maximise criticism because it ‘translates’ alternative medicine into the theories and terminology of allopathic medicine and so erodes its capacity to provide cognitively-valuable ‘radical alternatives’. These claims are then illustrated with a discussion of ‘traditional’ and ‘medical’ acupuncture. I conclude that ‘integrative medicine’ fails to exploit the cognitive value of alternative medicine and so should be rejected as an ideal of medical progress. (shrink)