Falsification-aware (hyper)sequent calculi and Kripke semantics for normal modal logics including S4 and S5 are introduced and investigated in this study. These calculi and semantics are constructed based on the idea of a falsification-aware framework for Nelson’s constructive three-valued logic. The cut-elimination and completeness theorems for the proposed calculi and semantics are proved.

In this study, falsification-aware semantics and sequent calculi for first-order classical logic are introduced and investigated. These semantics and sequent calculi are constructed based on a falsification-aware setting for first-order Nelson constructive three-valued logic. In fact, these semantics and sequent calculi are regarded as those for a classical variant of N3. The completeness and cut-elimination theorems for the proposed semantics and sequent calculi are proved using Schütte’s method. Similar results for the propositional case are also obtained.

This is a response to a claim by Sven Ove Hansson to the effect that Poppers dictum that falsification lies at the heart of all pursuit of science has once and for all been falsified by his study of articles published in Nature during the year 2000. We claim that this is based on a misunderstanding of Poppers philosophy of science interpreting it too literally, and that alternative readings of those papers are fully compliant with falsification. We scrutinize (...) Hansson’s arguments as well as giving an overview of Poppers falsification theory. (shrink)

This work inaugurates a critical inquiry into whether the ideas of Karl Popper, a philosopher of science, are used by astronomers and astrophysicists, a practicing community of scientists. It examines four basic components of Karl Popper's philosophy— falsification, prohibition, simplicity, and risk taking— and the extent that these themes become integrated into recent scientific literature on astronomy, astrophysics, cosmology, and stellar evolutionary theory. It concludes that the philosophy of science is highly relevant to the practice of astronomy, and that (...) Karl Popper plays a unique role in directing different communities of astronomers and cosmologists. (shrink)

Gillies introduced a propensity interpretation of probability which is linked to experience by a falsifying rule for probability statements. The present paper argues that general statistical tests should qualify as falsification rules. The ‘goodness-of-fit paradox’ is introduced: the confirmation of a probability model by a test refutes the model's validity. An example is given in which an independence test introduces dependence. Several possibilities to interpret the paradox and to deal with it are discussed. It is concluded that the propensity (...) interpretation properly reflects statistical practice, but it is not as objective as some adherents claim. (shrink)

D. W. Peetz; III—Falsification in Science, Proceedings of the Aristotelian Society, Volume 69, Issue 1, 1 June 1969, Pages 17–31, https://doi.org/10.1093/aristo.

Scientists have rules pertaining to data fabrication and falsification that are enforced with significant punishments, such as loss of funding, termination of employment, or imprisonment. These rules pertain to data that describe observable and unobservable entities. In this commentary I argue that scientists would not adopt rules that impose harsh penalties on researchers for data fabrication or falsification unless they believed that an aim of scientific research is to develop true theories and hypotheses about entities that exist, including (...) unobservable ones. This argument presents a challenge for constructive empiricists, such as van Fraassen. Constructive empiricists need to be able to explain why rules pertaining to data fabrication and falsification do not threaten their philosophy of science. (shrink)

Summary In two articles Friedrich Rapp argues that there is a methodological symmetry between falsification and verification in contradistinction to the logical asymmetry that obtains between them. (The Methodological Symmetry between Verification and Falsification,Ztschr. f. Allg. Wissth., Band VI/1 (1975), pp 139–144; A Helpful Argument — Reply to K. Eichner,Ztschr. f. Allg. Wissth., Band VII/1 (1976), pp. 121–123). Rapp puts forward the thesis that methodological falsification of a theory T implies the acceptance of an inference from ~ (...) (x) Tx to (x) ~ Tx. However, this thesis does not have to be accepted even if the premises of Rapp's argument were accepted. Furthermore, Rapp has not shown that the falsification of a theory T implies that T will not be retained. Neither has Rapp formulated assumptions that are sufficient to guarantee that the outcome of an intended test of a theory T can be considered as an outcome of an actual test of T. (shrink)

This volume examines the concept of falsification as a central notion of semantic theories and its effects on logical laws. The point of departure is the general constructivist line of argument that Michael Dummett has offered over the last decades. From there, the author examines the ways in which falsifications can enter into a constructivist semantics, displays the full spectrum of options, and discusses the logical systems most suitable to each one of them. While the idea of introducing falsifications (...) into the semantic account is Dummett's own, the many ways in which falsificationism departs quite radically from verificationism are here spelled out in detail for the first time. The volume is divided into three large parts. The first part provides important background information about Dummett’s program, intuitionism and logics with gaps and gluts. The second part is devoted to the introduction of falsifications into the constructive account and shows that there is more than one way in which one can do this. The third part details the logical effects of these various moves. In the end, the book shows that the constructive path may branch in different directions: towards intuitionistic logic, dual intuitionistic logic and several variations of Nelson logics. The author argues that, on balance, the latter are the more promising routes to take. "Kapsner’s book is the first detailed investigation of how to incorporate the notion of falsification into formal logic. This is a fascinating logico-philosophical investigation, which will interest non-classical logicians of all stripes." Graham Priest, Graduate Center, City University of New York and University of Melbourne. (shrink)

Efficient thinking is the foundation of efficient operation. The correct definition of concepts, especially the basic ones for a given field, in order to reach the truth, is a condition for the development of science and its social utility. The Petrażycki’s research methodology of law is a thoroughly modern method, as it enables effective examination of the accuracy of contemporary legal theories created after Petrażycki’s input. A model contemporary theory susceptible to an examination through the research methodology of law by (...) Petrażycki is the normative theory of legal rules and non-legal standards by Dworkin. For this purpose some falsifications will be subject, i.e. selected ad hoc among many others, two important theories of normative law theory Dworkin. The first one is the thesis classifying legal norms into two groups of norms, namely legal rules and non-legal standards. The second one is a thesis about the existence of who are capable of discovering and issuing lawful and, at the same time, fair court decisions, which are also the only ones for resolving particular court disputes. Unfortunately, owing to the seemingly cognitive research methodology of Petrażycki, both Dworkin’s deformed division of legal norms as well as Dworkin’s Hercules judges - cannot stand the test of authenticity. Due to the Petrażycki’s methodology, the legal-normative theory of Dworkin does not lose an innovative outlook on the existence of social norms, which are being discovered by judges in the jurisprudence, indifferently to the doubts over their proper classification. Moreover, Dworkin’s theory is placed between naive theories, regardless of whether they are considered realistically naive theories or nihilistically naive theories A few random reflections on the well-known work of Dworkin with the help of Petrażycki’s methodology serve to provide a new perspective on the contemporary legal normativity. (shrink)

The debate about the definition of scientific miscon duct is being revisited by the scientific community in response to the Commission on Research Integrity's recommendation for a new definition. Scientists and lawyers are debating whether scientific misconduct should include acts that are not unique to the scientific community and do not affect the research. Falsification of credentials is one form of such misconduct.The Office of Research Integrity and the National Science Foundation, the two federal agencies primarily responsible for developing (...) policies on scientific misconduct, have struggled to define scientific rnisconduct and to decide which forms of professional misconduct do and do not fall within the definition. Although falsification of credentials is not unique to the scientific community, OR1 and NSF have determined that when researchers lie about their credentials, such conduct may constitute scientific misconduct. The question is why this form of professional misconduct has been labeled scientific misconduct when it occurs in a research setting, and whether any distinction exists between this white coat crime and white collar crime. (shrink)

The debate about the definition of scientific miscon duct is being revisited by the scientific community in response to the Commission on Research Integrity's recommendation for a new definition. Scientists and lawyers are debating whether scientific misconduct should include acts that are not unique to the scientific community and do not affect the research. Falsification of credentials is one form of such misconduct.The Office of Research Integrity and the National Science Foundation, the two federal agencies primarily responsible for developing (...) policies on scientific misconduct, have struggled to define scientific rnisconduct and to decide which forms of professional misconduct do and do not fall within the definition. Although falsification of credentials is not unique to the scientific community, OR1 and NSF have determined that when researchers lie about their credentials, such conduct may constitute scientific misconduct. The question is why this form of professional misconduct has been labeled scientific misconduct when it occurs in a research setting, and whether any distinction exists between this white coat crime and white collar crime. (shrink)

This paper reconsiders the possibility of applying the procedure of falsification, which consists in testing a theory by confronting hypotheses derived from the theory with empirical data, in the studies of culture, in particular when evaluating interpretive hypotheses. Falsification, to which, according to Popper and his followers, the natural sciences owe their success, is viewed with strong suspicion when the object of investigation is meanings and values rather than material phenomena. If by interpretation one understands reconstruction of the (...) artefact’s meaning, obvious challenges when falsifying interpretive hypotheses include: the multiplicity, instability and ambiguity (indefiniteness or self-contradictory character) of meanings inherent in artefacts. All of this does not seem to exclude the possibility of identifying as misreadings interpretive hypotheses which clearly contradict relevant (non-contradictory) artefactual evidence. Falsification thus understood seems indispensable in educational contexts. At the same time, it must be admitted that in practice (as contrasted with the logical formula which underlies the procedure) falsification is inconclusive, and the application of the procedure is further complicated when meanings and values are the object of research. This is one of the reasons why falsification in the humanities (as elsewhere) needs to be complemented by other epistemic procedures while the status of literary studies or history of philosophy might best be perceived as partly cognitive (and in so far as the research conducted in these disciplines is empirically testable, also scientific) and partly creative (artistic). (shrink)

Revelation and Falsification: The Kitāb al-qirāʾāt of Aḥmad b. Muḥammad al-Sayyārī. Edited by Etan Kohlberg and Mohammad Ali Amir-Moezzi. Texts and Studies on the Qurʾān, vol. 4. Leiden: Brill, 2009. Pp. viii + 363 + 201. $259.

Dans ce travail, je vais m'efforcer de critiquer la thèse poppérienne de la dissymétrie entre les procédures de vérification et de réfutation des théories empiriques. Pour caractériser les théories empiriques, j'utiliserai le critère suivant: l'analyse des procédures discursives employées ne suffit pas comme base de discussion de leur valeur de vérité. On doit faire appel à quelque chose dont on considère que la donnée est en quelque façon, et du point de vue de la connaissance, extérieure à la théorie. Dans (...) le titre, j'ai employé «falsification» parce que c'était le terme habituel des traducteurs français de Popper jusqu'à une date récente. Je trouve cette terminologie peu claire et j'utiliserai les couples vérifier/réfuter, confirmer/infirmer. (shrink)

The main result of this paper is that KT is closed under a cancellation principle. This result extends to KTG1, but it does not extend to modal systems associated with the provability interpretation of L, such as KW and KT4Grz. Following Williamson, these results are applied to philosophical concerns about the proper form for theories of meaning, via the interpretation of L as some kind of veriflability. The cancellation principle can then be read as saying that verifilability conditions and falsiflability (...) conditions jointly determine truth conditions. (shrink)

Recent discussion of the problem of the conclusive falsification of scientific hypotheses has generally regarded the Duhemian Thesis (D-Thesis) as both true and interesting [10] but has dismissed the claim that disconfirmed hypotheses can be retained in explanations of the disconfirming evidence as either trivial [3] or unargued [12]. This paper rejects these positions. First, the status, in the argument for the D-Thesis, of the claim that auxiliary assumptions are necessary for the derivation of evidential propositions from hypotheses is (...) examined. It is concluded that depending on this status, the D-Thesis is either trivially true or unargued. Then the retention of contextually disconfirmed hypotheses is discussed. It is found that the use of such hypotheses in explanations of the disconfirming evidence is mediated by principles of scientific methodology. A new thesis is presented connecting the problem of conclusive falsification with changes in methodology. The argument for this thesis introduces a new analysis of methodological principles as inductive generalizations from scientific practice. Finally, the contribution of this analysis to the understanding of scientific change is described. (shrink)

Our starting point is Michael Luntley's falsificationist semantics for the logical connectives and quantifiers: the details of his account are criticised but we provide an alternative falsificationist semantics that yields intuitionist logic, as Luntley surmises such a semantics ought. Next an account of the logical connectives and quantifiers that combines verificationist and falsificationist perspectives is proposed and evaluated. While the logic is again intuitionist there is, somewhat surprisingly, an unavoidable asymmetry between the verification and falsification conditions for negation, the (...) conditional, and the universal quantifier. Lastly we are lead to a novel characterization of realism. (shrink)

It has been suggested that the enterprise of developing mechanistic theories of the human cognitive architecture is flawed because the theories produced are not directly falsifiable. Newell attempted to sidestep this criticism by arguing for a Lakatosian model of scientific progress in which cognitive architectures should be understood as theories that develop over time. However, Newell's own candidate cognitive architecture adhered only loosely to Lakatosian principles. This paper reconsiders the role of falsification and the potential utility of Lakatosian principles (...) in the development of cognitive architectures. It is argued that a lack of direct falsifiability need not undermine the scientific development of a cognitive architecture if broadly Lakatosian principles are adopted. Moreover, it is demonstrated that the Lakatosian concepts of positive and negative heuristics for theory development and of general heuristic power offer methods for guiding the development of an architecture and for evaluating the contribution and potential of an architecture's research program. (shrink)

The famous story of Diogenes searching for a man (ánthrōpon zētō̂) with his lantern in broad daylight (D.L. VI 41) has been interpreted in two ways, according to the meaning assigned to the word ánthrôpos (« human »). Proponents of the nominalist interpretation, by giving it the sense of human as a concept, see in the quest of Diogenes an attack against Plato’s Ideas. Defenders of the moral interpretation rather give the word ánthrôpos a concrete meaning with meliorative value: Diogenes (...) is searching in vain for a virtuous human. After showing that both interpretations are equally valid, our paper argues for a middle way, called the « falsification of language », which reconciles the two positions through an analysis of the relationship between language and truth in the Cynics. (shrink)

In this reply, I defend my views on Nietzsche's “falsification thesis” and his perspectivism against Maudemarie Clark's recent criticisms, which appeared in The Journal of Nietzsche Studies 49.1. I begin by amplifying my interpretation of Gay Science 110 and 111, which, I argue, show that the falsification thesis is absent from The Gay Science. I then turn to perspectivism and argue that, contrary to Clark's claims, perspectivism never involves the falsification of the views to which it applies. (...) It is therefore unnecessary to apply perspectivism, as Clark does, only to value-imbued viewpoints and not to empirical knowledge or the natural sciences. Perspectivism, as Nietzsche, I believe, makes clear, applies to every aspect of human knowledge. (shrink)

In the last section of his article Professor Kellenberger says that Professor Flew misunderstands the nature of religious utterances. These are affirmations of belief or trust, whereas Flew treats them as if they were hypotheses. If ‘God loves us’ is held by someone as an hypothesis then it would be proper to ask what justifies him in holding it, and, equally, what would have to happen for him to feel that he could no longer justifiably hold it. But if ‘God (...) loves us’ is said by someone as an affirmation of trust such questions seem out of place. (shrink)

In a well-known article, 1 John Hick argues that the proposition ‘God exists' is, in principle, verifiable but is not falsifiable. Essentially, his argument is that while no experience in this life could conclusively disprove the existence of the Christian God, certain experiences one might have in the after-life would conclusively verify the existence of the Christian God. In particular, he argues that post mortem experiences of Christ ruling in the Kingdom of God would constitute a verification of the existence (...) of the Christian God. In this paper, I shall argue that on Hick's own assumptions, the existence of the Christian God turns out to be falsifiable, in principle, as well as verifiable. (shrink)

In general, there are two main approaches to settling the alleged conflict between religion and science. On the first approach, one argues that there is not even the possibility of such a conflict, since the uses of religious utterances are sufficiently different from those of scientific ones to constitute them a distinct logical type. Thus, if religion appears to conflict with science, either this is merely an appearance, or else one of them, at least, is also performing the function of (...) the other, in which case their conflict is really either a scientific conflict or a religious conflict. In no case, however, can the truth of a scientific utterance be any reason for inferring the falsity of a religious one, and much less can it be any reason for entertaining doubts about the religious utterance's logical propriety. (shrink)

ABSTRACT This essay focuses on one of Nietzsche's greatest challenges to our understanding of perception and cognition: his “falsification thesis.” I argue that despite several innovative and insightful attempts to understand Nietzsche's claims about falsification, they have failed because they have not made an adequate connection between Nietzsche's falsification claims and his naturalistic account of the development of human cognition. Nietzsche's most important insight is that the basic falsifications and simplifications of sensation and language are not only (...) often quite useful but are also the cornerstone of knowledge and science. The central implications that follow are that cognition can succeed without correspondence between mind and world and that the standard assumption thought to be absolutely indispensable for science, that the world is fundamentally ordered, or a cosmos, is unnecessary. That is, Nietzsche's naturalism explains how we may have knowledge and successfully pursue science without avoiding falsification altogether. (shrink)

Contemporary empiricism has attempted to ground its analysis of science in a falsificationism based in selection theory. This paper links these evolutionary epistemologies with commitments to certain epistemological and ontological assumptions found in the later work of K. Popper, D. Campbell, and D. Hull, I argue that their assumptions about the character of contemporary empiricism are part of a shared paradigm of epistemological explanation which results in unresolved tensions within their own projects. I argue further that their claim to be (...) doing a science of science is not defensible. Hull's selectionism is analyzed to show how this epistemological agenda has played itself out in late empiricism. I suggest some directions that Hull might take toward an historical epistemology. (shrink)

Not too many years ago Antony Flew voiced a challenge. His challenge was directed to religious believers and it was this: ‘What would have to occur or to have occurred to constitute for you a disproof of the love of, or of the existence of, God?’ It was Flew's implicit argument that unless such a challenge could be met an utterance like ‘There is a God’ in fact denied nothing and so asserted nothing either . One great merit of Flew's (...) challenge was that it crystallised a malaise felt by many into a hard, pointed question. As a challenge this question elicited two basic reactions. (shrink)

The paper examines the impact of the idea of falsification in Karl Popper’s philosophy of science to rhetorical and political discussion. The structure of language is considered as revealing an inescapable means of falsification. After criticizing the rhetorical tradition that goes way back to Platonic and Aristotelian essentialism, the paper concludes that critical negativity committed to solving social issues should be at the core of rhetorical interaction in any democracy. Falsification and not social unanimity is what empowers (...) democratic practices. (shrink)