This paper presents an analysis of several experimental tests of Einstein's theories, together with their Popperian evaluation and a discussion of Einstein's reaction to these tests. It is shown that several relevant refutations of Einstein's theories were not accepted by Einstein as significant, and that therefore Einstein did not follow Popper's methodological rules. This is regarded as a strong case against Popper's criterion of demarcation.

Semmelweis’ discovery of the etiology of childbed fever has long attracted the attention of historians of medicine and biographers. In recent years it has also become of increasing interest to philosophers. In this paper I discuss the interpretation of Semmelweis’ methodology from the viewpoint of the inference to the best explanation and argue that Popperian methodology is better at capturing the dynamics of the growth of knowledge. Furthermore, I criticize the attempts to explain the failure of Semmelweis to have (...) his discovery accepted on the basis of the Kuhnian concept of paradigms, and warn that this view may endorse dogmatism as the norm The Kuhnian position also raises the problem of the authoritarian nature of scientific institutions which defend a paradigm against unorthodox, rebellious views, such as in the case of Semmelweis. Popperian philosophy is seen as a challenge to promote a link between an open society and open science with its main aim being to cherish a free critical spirit. (shrink)

That Haig and Sohn find the hypothetico-deductive approach wanting in different ways shows that multiple conditional syllogisms are being used in different stages of theory corroboration in the Popperian approach. The issues raised in the two commentaries assume a different complexion when certain distinctions are made.

In this paper, we take a fresh look at three Popperian concepts: riskiness, falsifiability, and truthlikeness of scientific hypotheses or theories. First, we make explicit the dimensions that underlie the notion of riskiness. Secondly, we examine if and how degrees of falsifiability can be defined, and how they are related to various dimensions of the concept of riskiness as well as the experimental context. Thirdly, we consider the relation of riskiness to truthlikeness. Throughout, we pay special attention to probabilistic (...) theories and we offer a tentative, quantitative account of verisimilitude for probabilistic theories. (shrink)

Karl Popper’s falsificationist epistemology that all knowledge advances through a process of conjectures and refutations carries profound implications for politics and education. In this article, I first argue that, on a political level, it is necessary to establish and maintain an open society by fostering not only five core values, viz. freedom, tolerance, respect, rationalism, and equalitarianism, but also three crucial practices, viz. democracy, state interventionism, and piecemeal social engineering. Then, considering that an open society places great political, and thus (...) educational, demands upon its members, I examine the role played by education in its establishment and maintenance, focusing on its educational aims, curriculum, and pedagogy. (shrink)

Karl Popper’s falsificationist epistemology that all knowledge advances through a process of conjectures and refutations carries profound implications for politics and education. In this article, I first argue that, on a political level, it is necessary to establish and maintain an open society by fostering not only five core values, viz. freedom, tolerance, respect, rationalism, and equalitarianism, but also three crucial practices, viz. democracy, state interventionism, and piecemeal social engineering. Then, considering that an open society places great political, and thus (...) educational, demands upon its members, I examine the role played by education in its establishment and maintenance, focusing on its educational aims, curriculum, and pedagogy. (shrink)

Interdisciplinary research in the fields of forestry and sustainability studies often encounters seemingly incompatible ontological assumptions deriving from natural and social sciences. The perceived incompatibilities might emerge from the epistemological and ontological claims of the theories or models directly employed in the interdisciplinary collaboration, or they might be created by other epistemological and ontological assumptions that these interdisciplinary researchers find no reason to question. In this paper we discuss the benefits and risks of two possible approaches, Popperian optimism and (...) Kuhnian pessimism, to interdisciplinary knowledge integration where epistemological and ontological differences between the sciences involved can be expected. (shrink)

Interdisciplinary research in the fields of forestry and sustainability studies often encounters seemingly incompatible ontological assumptions deriving from natural and social sciences. The perceived incompatibilities might emerge from the epistemological and ontological claims of the theories or models directly employed in the interdisciplinary collaboration, or they might be created by other epistemological and ontological assumptions that these interdisciplinary researchers find no reason to question. In this paper we discuss the benefits and risks of two possible approaches, Popperian optimism and (...) Kuhnian pessimism, to interdisciplinary knowledge integration where epistemological and ontological differences between the sciences involved can be expected. (shrink)

Even in a theory corroboration context, attention to effect size is called for if significance testing is to be of any value. I sketch a Popperian construal of significance tests that better fits into scientific inference as a whole. Because of its many errors Chow's book cannot be recommended to the novice.

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)

Summary In several places Popper describes a little experiment in which an audience is given the non-specific command ‚Observe!‘ He draws a number of conclusions from this experiment, in particular that observation takes place in the presence of theoretical problems, questions, hypotheses or points of view. The paper argues that while Popper's experiment is instructive, it hardly supports the strong conclusions he draws about the theory-dominance of observation in science. In particular, it is argued that talk of principles of (...) selection which guide us to relevant observations, rather than the host of irrelevant observations of the naive inductivist, is misleading. Rather, it is the goals, aims, motives or interests of an observer that guide observation and these need not always involve a theoretical component. (shrink)

Turing's programme, the idea that intelligence can be modelled computationally, is set in the context of a parallel between certain elements from metamathematics and Popper's schema for the evolution of knowledge. The parallel is developed at both the formal level, where it hinges on the recursive structuring of Popper's schema, and at the contentual level, where a few key issues common to both epistemology and metamathematics are briefly discussed. In light of this connection Popper's principle of transference, akin to Turing's (...) belief in the relevance of the theory of computation for modelling psychological functions, is widened into the extended principle of transference. Thus Turing's programme gains a solid epistemological footing. *I am grateful to Claude Lamontagne and Jean-Pierre Delage for their comments on this paper. (shrink)

RésuméJe me penche sur un aspect de la philosophie sociale de Popper, à savoir les principes d'évaluation des interprétations historiques. Ma thèse globale est que suivant la perspective poppèrienne, notre choix parmi des interprétations historiques doit user d'au moins deux des critères qu'applique Popper au choix parmi diverses théories scientifiques : une interprétation devrait logiquement se prêter à une réfutation et elle devrait être consistante. Afin de montrer la pertinence et la fécondité de cette approche, je me concentre sur l'interprétation (...) historique des causes de la montée du nazisme que propose Erich Fromm, en particulier dansEscape from Freedom.Je montrerai que l'application de notions psychanalytiques dans le cadre de son interprétation historique a une valeur explicative faible, voire nulle. Son échec à expliquer certaines questions sociales tient à plusieurs raisons. Premièrement, l'auteur ne fournit pas, quoi qu'il en dise, d'explication causale convaincante. Ensuite, les concepts et les multiples hypotheèsesad hocauxquels il a recours tendent è rendre son interprétation irréfutable. Enfin, Fromm s'appuie sur des assomptions théoriques contradictoires. Mon analyse est basée sur la notion fondamentale de Popper voulant que la connaissance scientifique empirique exige au strict minimum une ouverture des interprétations historiques à la critique intersubjective. C'est cette exigence qui permet de les critiquer — c'est-à-dire les accepter, les réfuter et les corriger — sur une base rationnelle. (shrink)

Rudolf Carnap proposed three reduction rules to improve scientific language. Those rules indicate when it is correct to add a property in situations in which other properties are already had. Assuming the theory of mental models, it has been shown that the rules are not hard to use from the cognitive point of view. The key to argue that is to accept that the human mind works as dual-process theories claim. According to these theories, people can use two different (...) systems. One of them implies effort but the other one does not. Thus, the idea is that Carnap’s reduction rules can be applied resorting just to the system not implying cognitive effort. This paper goes one step further and poses that even from a Popperian perspective the reduction rules keep not being difficult. One might think that falsifiability requires cognitive effort because it needs to address situations in which the sentences are false. However, this paper tries to explain that, following the theory of mental models, that is not hard if the sentences are conditionals, and the sentences in the reduction rules have conditional structures. (shrink)

Popper emphasised both the problem-solving nature of human knowledge, and the need to criticise a scientific theory as strongly as possible. These aims seem to contradict each other, in that the former stresses the problems that motivate scientific theories while the one ignores the character of the problems that led to the formation of the theories against which the criticism is directed. A resolution is proposed in which problems as such are taken as prime in the search for knowledge, (...) and subject to discussion. This approach is then applied to the problem of induction. Popper set great stake to his solution of it, but others doubted its legitimacy, in ways that are clarified by changing the form of the induction problem itself. That change draws upon logic, which is the subject of another application: namely, in contrast to Popper’s adhesion to classical logic as the only welcome form (because of the maximal strength of criticism that it dispenses), can other logics be used without abandoning his philosophy of criticism? (shrink)

The paper traces the sequence of events which brought Popperian philosophy (including Lakatos) to its position on the issues of excess content, novelty and scientific progress. The general approach is to analyze Popper's and Lakatos's positions on these issues as an appropriate response to a particular philosophical problem situation in which they found themselves. The paper closes with a discussion of how these issues relate to economics and economic methodology.

Fundamental to Sir Karl Popper’s oeuvre was the insight that humans err — and that we can learn from our mistakes. Critique is therefore valuable in all human endeavours. Although this stance is most famously seen in Popper’s claim that to be scientific a theory or hypothesis has to be falsifiable, Popper adopted a critical approach extensively in his work towards whatever crossed his path. Yet he never developed or suggested a general method of criticism. In this paper we (...) present and explain a method of criticism consistent with Popper’s approach and applicable to every rationally accessible part of human life including management theory and practice. Managers of course already know the importance of learning from mistakes. But what we propose here in our Model of Rational Criticism places the emphasis on learning before we actually make the mistakes by seeking to eradicate errors of reasoning, thus reducing the chance of costly errors in implementation. We conclude by exploring some of the implications of our model for managers. (shrink)

Sayer argues that Popper defended a logicist philosophy of science. The problem with such logicism is that it creates what is termed here as a `truncated foundationalism', which restricts epistemic certainty to the logical form of scientific theories whilst having nothing to say about their substantive contents. Against this it is argued that critical realism, which Sayer advocates, produces a linguistic version of truncated foundationalism and that Popper's problem-solving philosophy, with its emphasis on developing knowledge through criticism, eschews all forms (...) of foundationalism and is better able to account for the development of substantive knowledge claims. Key Words: critical realism • fallibilism • logicism • post-positivism • truncated foundationalism. (shrink)

Theory change is a central concern in contemporary epistemology and philosophy of science. In this paper, we investigate the relationships between two ongoing research programs providing formal treatments of theory change: the (post-Popperian) approach to verisimilitude and the AGM theory of belief change. We show that appropriately construed accounts emerging from those two lines of epistemological research do yield convergences relative to a specified kind of theories, here labeled “conjunctive”. In this domain, a set of plausible (...) conditions are identified which demonstrably capture the verisimilitudinarian effectiveness of AGM belief change, i.e., its effectiveness in tracking truth approximation. We conclude by indicating some further developments and open issues arising from our results. (shrink)

This is a collection of nineteen essays in the tradition of critical rationalism (as advocated by Karl Popper). All but one of the essays is previously unpublished and the one previously published paper has undergone significant revisions. The first four essays tackle topics in the philosophy of science, the first being an exposition of Popper's views, the others discussing falsifiability, truth, the aim of science, and ceteris-paribus law-statements. Five essays follow concerned with Reason, reasoning and reasons, in which faulty conceptions (...) of theoretical and practical reason are criticised, the nature and uses of argument are discussed, and the rationality of debate, agreement and disagreement are explained. Next, there are two papers on economics, one of which is a substantial critique of the so-called subjective theory of value, the other a brief discussion of entrepreneurial insight. The last section of the book contains a miscellany of eight critical essays in which some errors of contemporary philosophers are exposed regarding issues including the interpretation of Popper’s work, the Gettier problem, no-platforming, open-mindedness, homosexual equality, tolerance, philosophical heuristics and the conduct of debate. (shrink)

This paper was written with two aims in mind. A large part of it is just an exposition of Tarski's theory of truth. Philosophers do not agree on how Tarski's theory is related to their investigations. Some of them doubt whether that theory has any relevance to philosophical issues and in particular whether it can be applied in dealing with the problems of philosophy (theory) of science.In this paper I argue that Tarski's chief concern was the (...) following question. Suppose a language L belongs to the class of languages for which, in full accordance with some formal conditions set in advance, we are able to define the class of all the semantic interpretations the language may acquire. Every interpretation of L can be viewed as a certain structure to which the expressions of the language may refer. Suppose that a specific interpretation of the language L was singled out as the intended one. Suppose, moreover, that the intended interpretation can be characterized in a metalanguage L +. If the above assumptions are satisfied, can the notion of truth for L be defined in the metalanguage L + and, if it can, how can this be done? (shrink)

In the first part of this work(1) we have explicated the spacetime structure of the probabilistic organization of quantum mechanics. We have shown that each quantum mechanical state, in consequence of the spacetime characteristics of the epistemic operations by which the observer produces the state to be studied and the processes of qualification of these, brings in a tree-like spacetime structure, a “quantum mechanical probability tree,” thattransgresses the theory of probabilities as it now stands. In this second part we (...) develop the general implications of these results.Starting from the lowest level of cognitive action and creating an appropriate symbolism, we construct a “relativizing epistemic syntax,” a “general method of relativized conceptualization” where—systematically—each description is explicitly referred to the epistemic operations by which the observer produces the entity to be described and obtains qualifications of it. The method generates a typology of increasingly complex relativized descriptions where the question of realism admits of a particularly clear pronouncement. Inside this typology the epistemic processes that lie—UNIVERSALLY—at thebasis ofany conceptualization, reveal a tree-like spacetime structure. It appears in particular that the spacetime structure of the relativized representation of aprobabilistic description, which transgresses the nowadays theory of probabilities,is the general mould of which the quantum mechanical probability trees are only particular realizations. This entails a clear definition of the descriptional status of quantum mechanics. While the recognition of theuniversal cognitive content of the quantum mechanical formalism opens up vistas towardmathematical developments of the relativizing epistemic syntax.The relativized representation of a probabilistic description leads with inner necessity to a “morphic” interpretation of probabilities thatcan be regarded as a formalized and deepening elaboration of Sir Karl Popper's “propensity” interpretation. A functional is then constructed, the “opacity functional,” that associatesa mathematical expression to the Popperian “propensities”. Furthermore the opacity functional produces adeductive definition of Shannon's “informational entropy.” Thereby there appears an explicitly unified relativized probabilistic-informational approach. This sketches out a second branch of a future mathematical epistemic syntax, to be connected with the branch stemming from quantum mechanics.The problem of the objectivity of probabilistic descriptions acquires certain precise rephrasings and—in a sense—solution. (shrink)

The ecologist today finds scarce ground safe from controversy. Decisions must be made about what combination of data, goals, methods, and theories offers them the foundations and tools they need to construct and defend their research. When push comes to shove, ecologists often turn to philosophy to justify why it is their approach that is scientific. Karl Popper’s image of science as bold conjectures and heroic refutations is routinely enlisted to justify testing hypotheses over merely confirming them. One of the (...) most controversial theories in contemporary science is the Neutral Theory of Ecology. Its chief developer and proponent, Stephen Hubbell, presents the neutral theory as a bold conjecture that has so far escaped refutation. Critics of the neutral theory claim that it already stands refuted, despite what the dogmatic neutralists say. We see the controversy through a Popperian lens. But Popper’s is an impoverished philosophy of science that distorts contemporary ecology. -/- The controversy surrounding the neutral theory actually rests on a methodological fault. There is a strong but messy historical link between the concepts of being neutral and being null in biology, and Hubbell perpetuates this when he claims that the neutral theory is supplies the appropriate null for testing alternative theories. What method is being followed here? There are three contenders: -/- Null hypothesis testing tests for whether a there is a pattern to be explained. Null modeling tests for whether a process is causally relevant to a pattern. Baseline modeling apportions relative responsibility to multiple processes each relevant to a pattern. -/- Whether the neutral theory supplies an appropriate “null” depends upon whether null hypothesis, null modeling, or baseline model is intended. These methods prescribe distinct inference patterns. If they are null hypothesis testing or null modeling, the neutralists’s reasoning is invalid. If they are baseline modeling, the justification of a crucial assumption remains opaque. Either way, the neutral-null connection is being exploited rhetorically to privilege the neutral theory over its rivals. Clarifying the reasoning immunizes us against the rhetoric and foregrounds the underlying virtues of the neutralist approach to ecology. -/- The Popperian lens distorts theoretical development as dogmatism. Lakatos’s view of science as the development of research programmes clarifies the epistemology of the neutral theory. Focusing philosophical attention on the neutralist research programme illuminates (1) the synchronic uses of the neutral theory to make predictions and give descriptions and explanations; (2) its diachronic development in response to theoretical innovation and confrontation with data; (3) its complex relationships to alternative theories. For example, baseline modeling is now seen to be its primary explanatory heuristic. The justification for baseline modeling with the neutral theory, previously hidden from view, is seen in the logic of in the neutralist research programme. (shrink)

An integrated view concerning the probabilistic organization of quantum mechanics is obtained by systematic confrontation of the Kolmogorov formulation of the abstract theory of probabilities, with the quantum mechanical representationand its factual counterparts. Because these factual counterparts possess a peculiar spacetime structure stemming from the operations by which the observer produces the studied states (operations of state preparation) and the qualifications of these (operations of measurement), the approach brings forth “probability trees,” complex constructs with treelike spacetime support.Though it is (...) strictly entailed by confrontation with the abstract theory of probabilities as it now stands, the construct of a quantum mechanical probability treetransgresses this theory. It indicates the possibility of an extended abstract theory of probabilities including explicit representations of the cognitive operations involved in the probabilistic descriptions. So quantum mechanics appears to be neither a “normal” probabilistic theory nor an “abnormal” one, but a pioneering particular realization of afuture extended abstract theory of probabilities.The consequences of the integrated perception of the probabilistic organization of quantum mechanics are developed constructively. The current identifications of spectral decompositions, with superpositions of states, are removed. Then: (a) Inside the frontiers of the purely operational-observational orthodox formalism, operators of state preparation and the calculus with these are defined consistently with the definition and the calculus of quantum mechanical operators representing measurable dynamical quantities. This permits to grasp the physical meaning of superselection rules. Furthermore, a complement to the quantum theory of measurements is obtained. These prolongations of the orthodox formalism bring forth a “probabilistic incompleteness” of the quantum theory. (b) Beyond quantum mechanics as it now stands, a model is outlined that removes this probabilistic incompleteness, “the [particle + medium] individual model,”microscopic by certain aspects andcosmic by others.Globally, the approach draws attention upon the possibility and the interest of a general representation of the descriptions of any kind founded upon the explicit specification of the epistemic operations—with their spacetime features—by which the observer, who always is involved, produces the objects to be qualified and the qualifications of these. (shrink)

In response to the rapid and global socio-economic and political transformations within traditional and emerging democracies toward the end of the 20th Century and the beginning of the 21st Century, the need for a credible philosophical theory providing some explanatory wisdom and guidance to avoid descent into chaos, this paper argues, has become an imperative. This paper examines the plausibility of utilizing Plato's Theory of Change for the purpose, and identifies with Karl Popper's criticism of the theory (...) for its inherent historicism and totalitarianism. However, unlike Popper who stops at the criticism of the theory, I proceed with a reconstruction of Plato's theory, partly based on Popper's criticism, and apply it to the ongoing global changes and transformations. The new Plato-Popperian Theory of Change is then tested and applied to traditional as well as emerging democracies. Finally, the paper ends with compelling recommendations for policy-makers as well as social and political philosophers. (shrink)

Resumen: En este trabajo se presenta un abordaje explicativo del enfoque epistemológico -tal como es definido por J. Padrón- propio de la corriente de pensamiento convencionalmente denominada teoría crítica. En la primera parte abordamos su dimensión ontológica a través de la categoría de totalidad, tal como T. Adorno y M. Horkheimer la desarrollan a lo largo de sus trabajos, en oposición al empirismo popperiano. En la sección siguiente damos cuenta de la dimensión gnoseológica de la teoría crítica, desarrollando las reflexiones (...) y discusiones en torno a lo político en la producción científica y empleando como eje conductor el debate entre K. Popper y T. Adorno, con especial énfasis en el vínculo entre ciencia y praxis, entre producción de conocimiento científico e intencionalidad crítica y transformadora del mundo social, lo cual constituye un fundamento parcialmente meta-teórico clave para este enfoque. Finalmente, en las conclusiones, explicitamos algunas implicancias de lo trabajado para la investigación social actual: la centralidad de oponer a la creciente fragmentación e hiperespecialización del campo científico la noción ontológica de totalidad y la necesidad de acompañar la construcción crítica del conocimiento con una adecuada metacrítica de la posición teórica y práctica del investigador.: In this paper, we discuss the epistemological approach -as defined by J. Padrón- called critical theory. In the first part, we explain its ontological dimension through the category of totality, as T. Adorno and M. Horkheimer develop it throughout their works, in opposition to Popperian empiricism. In the following section, we analyse the gnoseological dimension of critical theory around the political in scientific production, using as a driving axis the debate between K. Popper and T. Adorno with special emphasis on the link between science and praxis, the production of scientific knowledge and a critical and transformational intentionality of the social world, which constitutes a partially meta-theoretical basis for this approach. Finally, in the conclusions, we explain some central implications for the current social research: the increasing fragmentation and hyper specialization of the scientific field against the ontological notion of totality, and the need to follow the critical construction of knowledge with an adequate meta-critical theoretical and practical position of the researcher. (shrink)

While $$\Lambda $$ Λ CDM has emerged as the standard model of cosmology, a small group of physicists defends modified newtonian dynamics (MOND) as an alternative view on cosmology. Exponents of MOND have employed a broad, at times explicitly philosophical, conceptual perspective in arguing their case. This paper offers reasons why that MONDian defense has been ineffective. First, we argue that the defense is ineffective according to Popperian or Lakatosian views–ostensibly the preferred philosophical views on theory assessment of (...) proponents of MOND. Second, we argue that the defense of MOND can instead best be reconstructed as an instance of meta-empirical theory assessment. The formal employment of meta-empirical assessment by MONDians is unconvincing, however, because it lacks a sufficient epistemic foundation. Specifically, the MONDian No Alternatives Argument relies on falsifiability or explanation conditions that lack epistemic relevance, while the argument from Unexpected Explanatory Success fails since there is a known alternative to MOND. In the last part of the paper, we draw some lessons for applications of meta-empirical assessment more generally. (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)

This paper introduces what is called the intersubjective interpretation of the probability calculus. Intersubjective probabilities are related to subjective probabilities, and the paper begins with a particular formulation of the familiar Dutch Book argument. This argument is then extended, in Section 3, to social groups, and this enables the concept of intersubjective probability to be introduced in Section 4. It is then argued that the intersubjective interpretation is the appropriate one for the probabilities which appear in confirmation theory whether (...) of a Bayesian or a Popperian variety. The final section of the paper states and tries to answer an objection due to Putnam. (shrink)

Are theories judged on the basis of empirical tests of their predictions, as proposed by Karl Popper and others, or are new theories adopted by younger scientists while old theories fade away when their advocates die, as Max Planck suggested? A famous historical episode, the rejection of steady state cosmology and the revival of the big bang cosmology following the 1965 discovery of the cosmic microwave background radiation, is examined to determine whether the scientific community followed Popper’s or Planck’s principle. (...) It is found that by 1975 almost all supporters of the steady state had either switched to the big bang or stopped publishing on cosmology. This case therefore seems to exemplify Popper’s principle, although it should be noted that two of the founders of steady state cosmology had strongly proclaimed their adherence to that principle. The case does not support the Popperian claim that successful novel predictions provide better evidence for a theory than deductions of known facts. (shrink)

Milton Friedman's famous methodological essay contains, along with much else, some strands that look as though they were taken from the “empirical-scientific” fabric described by Karl Popper. Think, for example, of Friedman's conviction that the way to test a hypothesis is to compare its implications with experience. Or of his more or less explicit espousal of the view that while no amount of facts can ever prove a hypothesis true, a single “fact” may refute it. Or of his assertion that (...) hypotheses are to be accepted only as provisionally true, and then only after repeated efforts to refute them have failed. The appearance of these Popperian ideas is not surprising. (shrink)

Abstract ‘PLATO’S THEORY OF CHANGE: A POPPERIAN RECONSTRUCTION AND ITS SIGNIFICANCE FOR TRADITIONAL AND EMERGING DEMOCRACIES,’ The International Journal of Applied Philosophy, Vol 8 Winter/Spring 1994, No.2. -/- This paper argues that in the midst of the unprecedented actual and potential socio-political and economic changes and transformations in our world toward the end of the 20th Century, the need for some philosophical grounding and guidance has become an imperative if only to avoid a global disaster or change for (...) its own sake. The changes cited include the collapse of the Soviet hegemony and the emergence of pro-democracy movements throughout in Eastern Europe, Latin America, South East Asia, and Africa including the post-Apartheid South Africa. Other changes mentioned include the integration of EEC members into a political unit, the threats from international terrorism, the increasing socio-economic gap and anti-Black racism in the US, and the changes promised by the new US President, Bill Clinton. The paper initiates discussion about the prospect for such a philosophical grounding and guidance by focusing on Plato’s Theory of Change and the possibility of utilizing it as a fulcrum for the ongoing global changes. Following Karl Popper’s lead, (in The Open Society and Its Enemies Vol .I, The Spell of Plato) Plato’s Theory is critiqued on account of its inherent historicism, totalitarianism, and social injustice. Unlike Popper who stops at the criticism however, this paper proceeds with a reconstruction of Plato’s Theory of Change in the light of the criticism as well as the criticism of Popper’s own inaccurate representation of Plato’s Theory. The new theory of change, aptly called, The Plato-Popper Theory of Change is applied to analyzing and theoretically solving or minimizing some of the problems within traditional democracies like the US and Emerging democracies in the Third World. Finally, the paper also presents a challenge to professional philosophers, especially those skilled in ethics and socio-political philosophy, to shift their focus from solving the abstract problems in some possible worlds to solving the real problems of this world in which we live and die. [312 words] . (shrink)

Coming from a mathematical background, I was always puzzled by Popper’s view, according to which, after the falsification of a scientific theory its degree of corroboration becomes zero. Most of the scientific theories taught in the physics departments have already been falsified, and what is the point of teaching theories, whose degree of corroboration is zero? The first important observation to make is that not all cases of falsification are the same. In some cases, as for instance in the (...) case of the theory of phlogiston, the falsification happened in agreement with the Popperian picture. Scientists discarded the falsified theory and opted for its alternative. Therefore, nowadays nobody tries to make a scientific contribution to the theory of phlogiston. Nevertheless, there are cases, and Newtonian mechanics is surely the most important among them, when the behaviour of the scientists after the falsification of the theory is from the Popperian point of view incomprehensible. Many scientists were not ready to discard the falsified theory, and not for irrational reasons. Some of the deepest discoveries in Newtonian mechanics as for instance the famous Kolmogorov, Arnold, Moser theorem were made many years after this theory was falsified. I think that Andrej Kolmogorov, Vladimir Arnold or Jürgen Moser cannot be compared to an Aristotelian philosopher, who adheres to his pet theory after its falsification. What these three mathematicians did was a fundamental contribution to modern science. (shrink)

_A Sceptical Theory of Scientific Inquiry: Problems and Their Progress_ presents a striking re-interpretation of Popper’s ‘critical rationalism’. Briskman stresses methodological argument rather than metaphysics, develops a ‘Popperian’ response to the Meno Paradox, and takes further Briskman’s approach to problems concerning creativity.

Coming from a mathematical background, I was always puzzled by Popper’s view, according to which, after the falsification of a scientific theory its degree of corroboration becomes zero. Most of the scientific theories taught in the physics departments have already been falsified, and what is the point of teaching theories, whose degree of corroboration is zero? The first important observation to make is that not all cases of falsification are the same. In some cases, as for instance in the (...) case of the theory of phlogiston, the falsification happened in agreement with the Popperian picture. Scientists discarded the falsified theory and opted for its alternative. Therefore, nowadays nobody tries to make a scientific contribution to the theory of phlogiston. Nevertheless, there are cases, and Newtonian mechanics is surely the most important among them, when the behaviour of the scientists after the falsification of the theory is from the Popperian point of view incomprehensible. Many scientists were not ready to discard the falsified theory, and not for irrational reasons. Some of the deepest discoveries in Newtonian mechanics as for instance the famous Kolmogorov, Arnold, Moser theorem were made many years after this theory was falsified. I think that Andrej Kolmogorov, Vladimir Arnold or Jürgen Moser cannot be compared to an Aristotelian philosopher, who adheres to his pet theory after its falsification. What these three mathematicians did was a fundamental contribution to modern science. (shrink)

Chow's defense of NHSTP ignores the fact that in psychology it is used to test substantive hypotheses in theory-corroborating research. In this role, NHSTP is not only inadequate, but damaging to the progress of psychology as a science. NHSTP does not fulfill the Popperian requirement that theories be tested severely. It also encourages nonspecific predictions and feeble theoretical formulations.

Reflection without Rules offers a comprehensive, pointed exploration of the methodological tradition in economics and the breakdown of the received view within the philosophy of science. Professor Hands investigates economists' use of naturalistic and sociological paradigms to model economic phenomena and assesses the roles of pragmatism, discourse, and situatedness in discussions of economic practice before turning to a systematic exploration of more recent developments in economic methodology. The treatment emphasizes the changes taking place in science theory and its relationship (...) to the movement away from a rules-based view of economic methodology. The work will be of interest to all economists concerned with methodological issues as well as philosophers and others studying the relationships between economics and contemporary science theory. (shrink)

In this paper it is argued that qualitative theories (Q-theories) can be used to describe the statistical structure of cross classified populations and that the notion of verisimilitude provides an appropriate tool for measuring the statistical adequacy of Q-theories. First of all, a short outline of the post-Popperian approaches to verisimilitude and of the related verisimilitudinarian non-falsificationist methodologies (VNF-methodologies) is given. Secondly, the notion of Q-theory is explicated, and the qualitative verisimilitude of Q-theories is defined. Afterwards, appropriate measures (...) for the statistical verisimilitude of Q-theories are introduced, so to obtain a clear formulation of the intuitive idea that the statistical truth about cross classified populations can be approached by falsified Q-theories. Finally, it is argued that some basic intuitions underlying VNF-methodologies are shared by the so-called prediction logic, developed by the statisticians and social scientists David K. Hildebrand, James D. Laing and Howard Rosenthal. (shrink)

The Popperian epistemology underlying Levelt's commentary and other aspects of contemporary psychology has limited application and, in particular, does not apply to the creation or development of theory, the main goal of MacKay . This is relevant to Levelt's questions, “What has changed?” and “What is the harvest?”: From a non-Popperian perspective, both changes and harvest are greater than Levelt's commentary would suggest and carry implications for the field at large.

Chow's endorsement of a limited role for null hypothesis significance testing is a needed corrective of research malpractice, but his decision to place this procedure in a hypothetico-deductive framework of Popperian cast is unwise. Various failures of this version of the hypothetico-deductive method have negative implications for Chow's treatment of significance testing, meta-analysis, and theory evaluation.

Hugh Everett’s “Universal Wave Theory Formulation of Quantum Mechanics”, though endorsed and promoted by his mentor John Wheeler, was dismissed by the mainstream in quantum mechanics. Why was it sidelined by those who endorsed the Copenhagen interpretation and John von Neumann’s approach to the famous measurement problem? Everett’s theory was taken up later by Bryce DeWitt under an interpretation, the many worlds universe theory, that is not actually how Everett interpreted his own formulation. I argue that by (...) looking at science as a social institution according to Ian C. Jarvie’s critique of Karl Popper’s view of science as a “Republic,” we can see how Everett was sidelined: external pressures of the Cold War and McCarthy and internal pressures of Big Science and the “military-industrial complex.”. (shrink)

Economic research is often isolated from social and political deliberations. Politicians put distinct results together in ad hoc ways. This state of affairs is explained as a result of equating rationality with coherence, system, and justification; the rationality principle, according to which social facts are to be explained as the result of coherent and/or justified plans of individuals, is singled out as the prime source of the isolation. A revised version is proposed which dispenses with the need for justification and/or (...) coherence for rational action of individuals. Partially rational actions are attempts to solve problems within given institutional contexts; individual rationality is a social activity whose value depends on the quality of social standards which individuals use to guide their thought. This revision removes barriers between economic, social, and political theories, without blocking social scientific explanation. Indeed, it opens up possibilities now blocked. (shrink)