Popper: Epistemology

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)

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)

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)

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)

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)

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.”.

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)

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)

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)

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.

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 tu quoque argument is the argument that since in the end rationalism rests on an irrational choice of and commitment to rationality, rationalism is as irrational as any other commitment. Popper's and Polanyi's philosophies of science both accept the argument, and have on that account many similarities; yet Popper manages to remain a rationalist whereas Polanyi decided for an irrationalist version of rationalism. This is more marked in works of their respective followers, W. W. Bartley III and Thomas S. (...) Kuhn. Bartley declares the rationalist's very openness to criticism open to criticism, in the hope of rendering Popper's critical rationalism quite comprehensive. Kuhn makes rationality depend on the existence of an accepted model for scientific research (paradigm), thus rendering Polanyi's view of the authority of scientific leadership a sine qua non for scientific progress. The question raised here is, in what sense is a rationalist committed to his rationality, or an irrationalist to his specific axiom ? The tradition views only the life?long commitment as real. Viewing rationality as experimental open?mindedness, we may consider a rationalist unable to retreat into any life?long commitment ? even commitment to science. In this way the logic of the tu quoque argument is made irrelevant: anyone able to face the choice between rationality and commitment is already beyond such a choice; it is one thing to be still naïve and another ? and paradoxical ? thing to return to one's naïveté. (shrink)

Two suggestions are at the back of the present talk. First, toleration is obligatory, not criticism. So do not try to make people critically-minded: do not force them in any way to try to offer or accept criticism, to learn to participate effectively in the game of critical discussion. If they refuse, then they are within their right. Also, they will easily ad vance excuses for their refusal; admittedly some of these are unreasonable, but not all. Instead of trying to (...) make people critically-minded, try to help them become criticallyminded if and when they request help on this matter, but not otherwise. My second suggestion is that a simple, inconclusive, criterion should be used to distinguish with ease between proper and improper criticism — not by reference to validity, since proper criticism may turn out to be invalid, and some of the worst diatribes may inadvertently include valid criticism. This should hardly be expected of diatribes, and these are recognizable by their display of poor appreciation their target. (This was noted in a recent review by Stefano Gattei of the Italian edition of the Lakatos -Feyerabend correspondence: it largely concerns Popper, yet it displays boorish disrespect to him.) So much for my messages here. I also wish to present here the following ideas. (shrink)

In "Criticism and the History of Science" Karl Popper's falsificationist conception of science is developed and defended against criticisms raised by Thomas ...

Abstract The central thesis of Karl Popper's philosophy is that intellectual and political progress are best achieved by not deferring to dogmatic authority. His philosophy of science is a plea for the replacement of classic dogmatic methodology with critical debate. His philosophy of politics, similarly, is a plea for replacing Utopian social and political engineering with a more fallibilist, piecemeal variety. Many confuse his anti?dogmatism with relativism, and his anti?authoritarianism with Cold War conservatism or even with libertarian politics. Not so: (...) he showed a clear preference for the ideal of truth over relativist complacency, for cosmopolitanism over nationalism, and for democratic control over unbridled capitalism. (shrink)

A fundamental tenet of Paul Feyerabend’s pluralistic view of science has it that theory proliferation, that is, the availability of theoretical alternatives, is of crucial importance for the detection of anomalies in established theories. Paul Hoyningen-Huene calls this the Anomaly Importation Thesis, according to which anomalies are imported, as it were, into well-established theories from competing alternatives. This article pursues two major objectives: (a) to work out the systematic details of Feyerabend’s ideas on theory proliferation and anomaly import as they (...) are presented in his early publications and his Against Method and (b) to compare Feyerabend’s ideas on theory proliferation and anomaly import with corresponding features in Popper’s critical rationalist philosophy of science. As it turns out, neither the Principle of Proliferation nor the Anomaly Importation Thesis are necessarily incompatible with critical rationalism. In spite of Feyerabend’s general anti-Popperian attitude, I argue that theoretical pluralism can be seen as an advancement of the critical rationalist philosophy and that critical rationalism provides good arguments for pluralism. (shrink)

The paper deals with the ethical-moral dimension of Popper’s critical rationalism, which is the less analyzed aspect of his philosophy. Critical rationalism is not without assumptions. As a life attitude, it is actualized on the basis of one’s moral preferences based rather on assumptions than on critical reasonableness. Critical rationalism does not exclude logical argumentation and reasoning, but the adoption of them is predominantly the result of an individual moral decision and choice, based, paradoxically enough, on an irrational belief in (...) reason. The author considers this attitude to be productive, as it emphasizes individual moral responsibility. Nobody is able to persuade us about the relevance of what we don’t want to adopt and apply. Thus we find ourselves in the sphere of personal morality. (shrink)

Popper?s theory of learning is sometimes met with incredulity because Popper claims that there is no transference of knowledge or knowledge elements from outside the individual, neither from the physical environment nor from others. Instead, he claims that we can improve our present theories by discovering their inadequacies.The intent of this article is not to persuade educators to adopt Popper?s approach uncritically to build their professional knowledge. Rather, it presents a discussion on the need for teachers to adopt a critical (...) approach in eliminating what is inadequate and preserve what is adequate by modifying or abandoning whatever traditions or practices that are inadequate to improve their teaching practice. Popper claims that knowledge advances by searching for and eliminating error contained in our theory. In other words, we can improve our present theories by finding out their inadequacies. (shrink)

W. W. Bartley argued that Popper's original theory of rationality opened itself to a tu quoque argument from the irrationalist and to avoid this Bartley proposed an alternative theory of rationality: pancritical rationalism . Bartley's characterization of PCR leads, however, to self-referential paradox. David Miller outlaws self-reference by distinguishing between positions and statements, Miller's distinction looks, however, suspiciously like an ad hoc manoeuvre or as a stipulation that has to be accepted dogmatically. Furthermore, Miller's move is inadequate because it is (...) a second world answer to a third world problem, that is, to logical paradox. It is then argued that given the paradoxical nature of PCR, Popper's old justificationist critical rationalism with its minimum of dogmatism and irrationalism is malgré tout a better option. (shrink)

Popper's thesis that the growth of knowledge lies in the emergence of problems out of criticism and takes place in an autonomous world of products of the human mind (his so-called world-3) raises two questions: (1) Why does criticism lead to new problems, and (2) Why can only a limited number of tentative solutions arise at a given time? I propose the following answer: Criticism entails an overlooked evolutionary world-3 mechanism, namely, the migration of piece meal conceptual schemes from one (...) research tradition to another. Popper by passed the questions above because he relied very heavily on the selective power of criticism. (shrink)

O presente trabalho analisa a perspectiva indeterminista da epistemologia de Karl Popper. A partir da compreensáo unitária do Racionalismo Crítico, como epistemologia e filosofia política, ao mesmo tempo, o artigo mostra em que sentido se pode afirmar que a proposta de Popper revela uma questáo ética de largo alcance e interesse na filosofia contemporânea, sobretudo no que se refere à análise da crise da cientificidade moderna. Palavras-chave: Ética, Indeterminismo, Popper, Racionalismo Crítico.

Bartley’s pancritical rationalism is seen by some as being a refinement of Popper’s critical rationalism. I contest this view and argue that pancritical rationalism is obtained from critical rationalism by removing some of its most important and useful features. The remainder consists of a restatement of some of Popper’s key ideas and an interpretation of others that I attempt to show is not entirely faithful to what Popper says.

Currently, testimony is studied extensively in Anglo-American philosophy. However, most of this work is done from a justificationist perspective in which philosophers try to justify our reliance on testimony in some way. I agree with Popper that justificationism is radically mistaken. Thus, I construct an account of how we respond to testimony that in no way attempts to justify our reliance on it. This account is not a straightforward exegesis of Popper, as he never tackled testimony systematically. It makes use, (...) however, of several of Popper's key insights and incorporates them into a viable theory of testimony. Key Words: testimony • anti-justificationism • social epistemology • situational analysis • defeasibility. (shrink)

The paper tries to defend the critical rationalism of Popper and Albert against criticisms brought forward by Janich/Kambartel/Mittelstrass in a series of articles entitled: Wissenschaftstheorie als Wissenschaftskritik, Aspekte 1972 - since published as a book. These authors try to overcome the trilemma of infinite regress, circular reasoning and axiomatic foundation which confronts any attempt to base scientific foundations on reasons: they claim that this trilemma is due to an "extremely limited concept of reasoning" which can be overcome by using the (...) notion of the 'defence' of a statement. Against this it is shown that the proposed solution is based on a mere an inadmissible shifting of the burden of proof in scientific reasoning. (shrink)

Abstract Popper's philosophy of science represents a radical departure from almost all other views about knowledge. This helps account for serious misunderstandings of it among admirers no less than among adversaries. The view that knowledge has and needs no foundations is counterintuitive and apparently relativistic. But Popper's fallibilism is in fact a far cry from anti?realism. Similarly, Popper's social and political philosophy, although seemingly conservative in practice, can be quite radical in theory. And while Popper was an ardent democrat, his (...) reasons for supporting democracy were so unusual that they may escape the problem posed for democratic theory by the political ignorance of the demos. (shrink)