We revisit the notion of initial sets by Xu and Cayrol 2016), i. e., non-empty minimal admissible sets in abstract argumentation frameworks. Initial sets are a simple concept for analysing conflicts in an abstract argumentation framework and to explain why certain arguments can be accepted. We contribute with new insights on the structure of initial sets and devise a simple non-deterministic construction principle for any admissible set, based on iterative selection of initial sets of the original framework and its induced (...) reducts. In particular, we characterise many existing admissibility-based semantics via this construction principle, thus providing a constructive explanation on the structure of extensions. We also investigate certain problems related to initial sets with respect to their computational complexity. (shrink)

Dung’s abstract argumentation provides us with a general framework to deal with argumentation, non-monotonic reasoning and logic programming. For the extension-based semantics, one of the basic principles is I-maximality which is in particular related with the notion of skeptical justification. Another one is directionality which can be employed for the study of dynamics of argumentation. In this paper, we introduce two new extension-based semantics into Dung’s abstract argumentation, called grounded-like semantics and initial semantics which satisfy the I-maximality and directionality principles. (...) The initial semantics has many good properties and can be expected to play a central role in studying other extension-based semantics, such as admissible, complete and preferred semantics. (shrink)

This article attacks “open systems” arguments that because constant conjunctions are not generally observed in the real world of open systems we should be highly skeptical that universal laws exist. This work differs from other critiques of open system arguments against laws of nature by not focusing on laws themselves, but rather on the inference from open systems. We argue that open system arguments fail for two related reasons; 1) because they cannot account for the “systems” central to their (...) class='Hi'>argument (nor the implied systems labeled “exogenous factors” in relation to the system of interest) and 2) they are nomocentric, fixated on laws while ignoring initial and antecedent conditions that are able to account for systems and exogenous factors within a fundamentalist framework. (shrink)

Following the argument of Pusey et al. (in Nature Phys. 8:476, 2012), new interest has been raised on whether one can interpret state-vectors (pure states) in a statistical way (ψ-epistemic theories), or if each one of them corresponds to a different ontological entity. Each interpretation of quantum theory assumes different ontology and one could ask if the PBR argument carries over. Here we examine this question for histories formulations in general with particular attention to the co-event formulation. State-vectors (...) appear as the initial state that enters into the quantum measure. While the PBR argument goes through up to a point, the failure to meet some of the assumptions they made does not allow one to reach their conclusion. However, the author believes that the “statistical interpretation” is still impossible for co-events even if this is not proven by the PBR argument. (shrink)

This document provides a brief report on initial research into how argument presentation affects susceptibility to confirmation bias as well as feelings toward political opponents.

Intimate partners are sometimes unable to resolve an argument in a single episode. Often this results in serial arguing as one individual repeatedly confronts a resisting other over the same issue. This study investigates how adopting the role of initiator versus resistor impacts experiences with and perceptions of a serial argument. The results of a survey of undergraduates in dating relationships indicate that relative to resistors, initiators report that the initial argumentative episode resulted from an urgent need for (...) action; that they planned what they would say prior to the confrontation; and that they were demanding while their partners withdrew from the interaction. Regardless of an individual's argumentative role, the more times a serial argument had occurred, the more predictable or ‘scripted’ the content of each episode was perceived to be. However, among resistors, the more times a serial argument had occurred, the less resolvable the argument was perceived to be and the more harmful it was seen to be to the relationship. In contrast, among initiators, there were nonsignificant trends which indicated that the more times a serial argument had occurred, the more resolvable it was perceived to be and the less relational harm that had resulted from it. Implications for future research are discussed. (shrink)

Problems with regard to the analysis of argumentative partly discourse arise from definitorial disconformity. In this article, Informal argument is taken as the primary definition to study the basic structure of argument from a fragment of an Agatha Christie novel. Bilmes' account of the notions of Formulation (F) and Decision (D+/D-) are adapted to describe the relations of opposition which are displayed in informal argument. The minimal structure of argument is represented by the formula F/D-/D-, in (...) which F is a speaker's personal composition of a ‘fact’, the first D- is the disconfirming uptake of it by another speaker and the second D- is the completing disconfirming uptake by the initial speaker. Some of the speaker's possibilities to initiate an argument by expressing a Formulation are explored, as well as the social and cultural norms which play a role in argument-initiation and the concepts of ‘win’ and ‘loss’. (shrink)

In this paper, a case study is conducted to test the capability of the Carneades Argumentation System to model the argumentation in a case where forensic evidence was collected in an investigation triggered by a conflict among art experts on the attribution of a painting to Leonardo da Vinci. A claim that a portrait of a young woman in a Renaissance dress could be attributed to da Vinci was initially dismissed by art experts. Forensic investigations were carried out, and evidence (...) was collected by art history experts and scientific experts. The expert opinions were initially in conflict, but new evidence shifted the burden of proof onto the side of the skeptics. This paper presents an analysis of the structure of the interlocking argumentation in the case using argument mapping tools to track the accumulation of evidence pro and con. (shrink)

This chapter contains sections titled: * Notes.

A popular argument against the unilateral appropriation of unowned resources maintains that such appropriation is impossible because it implies a power to unilaterally impose novel obligations on others—a power which people cannot have given that they are moral equals. However, Bas van der Vossen has recently argued that initial appropriation does not create obligations in this way; rather, it merely alters the empirical facts that, together with obligations, determine people’s practical moral requirements. This paper argues that van der Vossen (...) is mistaken. Specifically, it contends that the creation of obligations is accompanied by a distinctive kind of variation in the obliged party’s practical requirements across possible worlds. Given that initial appropriation entails such variation, the paper argues that such appropriation does, in fact, create obligations. (shrink)

A characterization of transcendental arguments is proffered, whereby they yield conclusions about how things are via intermediate conclusions about how we must think that they are. A variant kind of argument is then introduced. Arguments of this variant kind are dubbed ‘conative’ transcendental arguments: these yield conclusions about how it is desirable for things to be via intermediate conclusions about how we must desire that they are. The prospects for conative transcendental arguments are considered. It is argued that, although (...) they can never be of practical use, they may nevertheless be of use in dissolving certain applications of the debate—initiated by Bernard Williams—about whether anyone can have an ‘external’ reason to do anything, that is to say a reason that is not grounded in some desire of the person’s, in a suitably broad sense of ‘desire’. The relevance of conative transcendental arguments to this debate is that they highlight desires that we cannot help having and with respect to which the debate lacks any suitable focus. In the final section of the essay five conative transcendental arguments deriving from the work of five moral philosophers are briefly considered. (shrink)

It is often thought that, although Spinoza develops a bold and distinctive conception of God (the unique substance, or Natura Naturans, in which all else inheres and which possesses infinitely many attributes, including extension), the arguments that he offers which purport to prove God’s existence contribute nothing new to natural theology. Rather, he is seen as just another participant in the seventeenth century revival of the ontological argument initiated by Descartes and taken up by Malebranche and Leibniz among others. (...) That this is the case is both puzzling and unfortunate. It is puzzling because although Spinoza does offer an ontological proof for the existence of God, he also offers three other non‐ontological proofs. It is unfortunate because these other non‐ontological proofs are both more convincing and more interesting than his ontological proof. In this paper, I offer reconstructions and assessments of all of Spinoza’s arguments and argue that Spinoza’s metaphysical rationalism and his commitment to something like a Principle of Sufficient Reason are the driving force behind Spinoza’s non‐ontological arguments. (shrink)

Contemporary philosophers have largely neglected Richard Taylor’s design argument. Given that the initial responses to the argument were largely negative, one might be tempted to conclude that the argument is simply philosophically inadequate. This paper rejects that conclusion by showing how Taylor’s argument has been misunderstood by his critics. In defending Taylor, it is shown that the two types of objections levied against him fail to even blemish his design argument, let alone refute it. Consideration (...) is also given to the argument’s historical lineage, along with a proposal for future considerations of the connection between epistemological realism and design. (shrink)

Very broadly, an argument from collections is an argument that purports to show that our beliefs about sets imply — in some sense — the existence of God. Plantinga (2007) first sketched such an argument in “Two Dozen” and filled it out somewhat in his 2011 monograph Where the Conflict Really Lies: Religion, Science, and Naturalism. In this paper I reconstruct what strikes me as the most plausible version of Plantinga’s argument. While it is a good (...) argument in at least a fairly weak sense, it doesn’t initially appear to have any explanatory advantages over a non-theistic understanding of sets — what I call set theoretic realism. However, I go on to argue that the theist can avoid an important dilemma faced by the realist and, hence, that Plantinga’s argument from collections has explanatory advantages that realism does not have. (shrink)

‘Gouldian arguments’ appeal to the contingency of a scientific domain to establish that domain’s autonomy from some body of theory. For instance, pointing to evolutionary contingency, Stephen Jay Gould suggested that natural selection alone is insufficient to explain life on the macroevolutionary scale. In analysing contingency, philosophers have provided source-independent accounts, understanding how events and processes structure history without attending to the nature of those events and processes. But Gouldian Arguments require source-dependent notions of contingency. An account of contingency is (...) source-dependent when it is indexed to some pattern and some process. Positions like Gould’s do not turn on the mere fact of life’s contingency—that life’s shape could have been different due to its sensitivity to initial conditions, path-dependence or stochasticity. Rather, Gouldian arguments require that the contingency is due to particular kinds of processes: in this case, those which microevolutionary theory cannot account for. This source-dependent perspective clarifies both debates about the nature and importance of contingency, and empirical routes for testing Gould’s thesis. (shrink)

The Handbook of Formal Argumentation is a community effort aimed at providing a comprehensive and up-to-date view of the state of the art and current trends in the lively research field of formal argumentation. The first volume of the Handbook is organised into five parts, containing nineteen chapters in all, each written by leading experts in the field. The first part provides a general and historical perspective on the field. The second part gives a comprehensive coverage of the argumentation formalisms (...) available in the literature at various levels of abstraction. The third part is devoted to cover some of the many dialogical aspects of argumentation, while the fourth one deals with algorithmic, computational and implementation issues. Finally, the fifth part provides some deeper analyses on the previously introduced topics. The Handbook of Formal Argumentation is an open-ended initiative of which the present volume is the first outcome. Further volumes are planned to cover topics not included in the present one and the initiative is conceived to grow by the support and feeding it receives from the community members. (shrink)

Reasoning, defined as the production and evaluation of reasons, is a central process in science. The dominant view of reasoning, both in the psychology of reasoning and in the psychology of science, is of a mechanism with an asocial function: bettering the beliefs of the lone reasoner. Many observations, however, are difficult to reconcile with this view of reasoning; in particular, reasoning systematically searches for reasons that support the reasoner’s initial beliefs, and it only evaluates these reasons cursorily. By contrast, (...) reasoners are well able to evaluate others’ reasons: accepting strong arguments and rejecting weak ones. The argumentative theory of reasoning accounts for these traits of reasoning by postulating that the evolved function of reasoning is to argue: to find arguments to convince others and to change one’s mind when confronted with good arguments. Scientific reasoning, however, is often described as being at odds with such an argumentative mechanisms: scientists are supposed to reason objectively on their own, and to be pigheaded when their theories are challenged, even by good arguments. In this article, we review evidence showing that scientists, when reasoning, are subject to the same biases as are lay people while being able to change their mind when confronted with good arguments. We conclude that the argumentative theory of reasoning explains well key features of scientists’ reasoning and that differences in the way scientists and laypeople reason result from the institutional framework of science. (shrink)

PCCP is the much discussed claim that the probability of a conditional A → B is conditional probability. Triviality results purport to show that PCCP – as a general claim – is false. A particularly interesting proof has been presented in (Hájek, 2011), who shows that – even if a probability distribution P initially satisfied PCCP – a rational update can produce a non-PCCP probability distribution. We argue that the notion of rational update in this argumentation is construed in much (...) too broad a way. In order to make the argumentation precise, we discuss the general rules for modeling conditionals in probability spaces and present formalized version(s) of PCCP and of minimal assumptions concerning the appropriate spaces. Using the introduced apparatus we give a detailed analysis of Hájek’s (2011) triviality proof and show that it is based on an application of revision rules which allow one to construct probability distributions violating not only PCCP, but also fundamental properties of conditionals. This means that they do not really provide arguments against PCCP, properly formalized. We also discuss a Dutch Book argument which shows that the updated belief system is not coherent. This gives an additional, strong argument against accepting the update rules. We also discuss the Converse Dutch Book theorem and argue, that even if the produced probability measure seems to violate it, it cannot serve as the counterexample, as it is not an appropriate model for conditionals. Ultimately, we show that important arguments against PCCP fail. (shrink)

If an argument can be reconstructed in at least two different ways, then which reconstruction is to be preferred? In this paper I address this problem of argument reconstruction in terms of Ryle’s infinite regress argument against the view that knowledge-how requires knowledge-that. First, I demonstrate that Ryle’s initial statement of the argument does not fix its reconstruction as it admits two, structurally different reconstructions. On the basis of this case and infinite regress arguments generally, I (...) defend a revisionary take on argument reconstruction: argument reconstruction is mainly to be ruled by charity (viz. by general criteria which arguments have to fulfil in order to be good arguments) rather than interpretation. (shrink)

There is a generic way to add any new feature to a system. It involves identifying the basic units which build up the system and introducing the new feature to each of these basic units. In the case where the system is argumentation and the feature is probabilistic we have the following. The basic units are: the nature of the arguments involved; the membership relation in the set S of arguments; the attack relation; and the choice of extensions. Generically to (...) add a new aspect to an argumentation network \ can be done by adding this feature to each component. This is a brute-force method and may yield a non-intuitive or meaningful result. A better way is to meaningfully translate the object system into another target system which does have the aspect required and then let the target system endow the aspect on the initial system. In our case we translate argumentation into classical propositional logic and get probabilistic argumentation from the translation. Of course what we get depends on how we translate. In fact, in this paper we introduce probabilistic semantics to abstract argumentation theory based on the equational approach to argumentation networks. We then compare our semantics with existing proposals in the literature including the approaches by M. Thimm and by A. Hunter. Our methodology in general is discussed in the conclusion. (shrink)

In the debate between relativism and contextualism about various expressions, the Operator Argument, initially proposed by Kaplan , has been taken to support relativism. However, one widespread reaction against the argument has taken the form of arguing against one assumption made by Kaplan: namely, that certain natural language expressions are best treated as sentential operators. Focusing on the only extant version of the Operator Argument proposed in connection to predicates of personal taste such as “tasty” and experiencer (...) phrases such as “for Anna” ), in this paper I investigate whetherthe reasons offered by Cappelen and Hawthorne against various assumptions of the argument failing in the case of modal, temporal, locationaland precisional expressions transfer to the case of experiencer phrases to undercut support for relativism about predicates of personal taste. My aim is to show that they don’t. Thus, I first show that their considerations against experiencer phrases such as “for Anna” being sentential operators are not decisive. Second, I show that even if granting that such experiencer phrases are not sentential operators, a suitably modified version of the Operator Argument can be defended from the objections they raise. (shrink)

Some have suggested that images can be arguments. Images can certainly bolster the acceptability of individual premises. We worry, though, that the static nature of images prevents them from ever playing a genuinely argumentative role. To show this, we call attention to a dilemma. The conclusion of a visual argument will either be explicit or implicit. If a visual argument includes its conclusion, then that conclusion must be demarcated from the premise or otherwise the argument will beg (...) the question. If a visual argument does not include its conclusion, then the premises on display must license that specific conclusion and not its opposite, in accordance with some demonstrable rationale. We show how major examples from the literature fail to escape this dilemma. Drawing inspiration from the graphical logic of C. S. Peirce, we suggest instead that images can be manipulated in a way that overcomes the dilemma. Diagrammatic reasoning can take one stepwise from an initial visual layout to a conclusion—thereby providing a principled rationale that bars opposite conclusions—and the visual inscription of this correct conclusion can come afterward in time—thereby distinguishing the conclusion from the premises. Even though this practical application of Peirce’s logical ideas to informal contexts requires that one make adjustments, we believe it points to a dynamic conception of visual argumentation that will prove more fertile in the long run. (shrink)

This article captures and critiques a recurring and prominent political argument against animal welfare improvements in Switzerland which we term the “ranking argument”. This states that Swiss animal welfare law ranks among the strictest in the world, therefore no improvements are called for. This argument was advanced three times by Swiss government authorities in 2022 alone, but also in a case dating back to 1984, to advise the electorate on popular initiatives aiming at animal welfare improvements. We (...) argue that, while the argument commits a fallacy of relative privation and is ethically dubious, it can be deployed to great effect by agents opposed to norm change in animal welfare regulation. We conclude with some thoughts on how the ranking argument can and should be challenged in public discourse. (shrink)

A rich literature in bioethics argues against the use of anonymous gamete donation in the name of the ‘interest in knowing one’s genetic origins’. This interest stems from medical as well as psychosocial and identity reasons. The term ‘genealogical bewilderment’ has been coined to express the predicament of those deprived of access to information about their origins. Another rich body of literature in bioethics discusses arguments for and against posthumous-assisted reproduction (PAR), with a recent focus on PAR that is initiated (...) by the parents of a deceased man (rather than his partner). This paper revisits arguments against PAR, in light of arguments regarding the interest in knowing one’s genetic origins. Limiting the discussion to the specific context of parent-initiated PAR (PIPAR), we argue that the use of cryopreserved sperm from a deceased identifiable man in the context of PIPAR may be ethically preferable when compared with the use of anonymous donor sperm, since it allowsgenealogical certainty, that is, giving the prospective child access to information about the identity, life story and ancestry of the genetic progenitor as well asgenealogical embeddedness, that is, close relationship with extended family members. (shrink)

A central theme throughout the impressive series of philosophical books and articles Stephen Toulmin has published since 1948 is the way in which assertions and opinions concerning all sorts of topics, brought up in everyday life or in academic research, can be rationally justified. Is there one universal system of norms, by which all sorts of arguments in all sorts of fields must be judged, or must each sort of argument be judged according to its own norms? In The (...) Uses of Argument Toulmin sets out his views on these questions for the first time. In spite of initial criticisms from logicians and fellow philosophers, The Uses of Argument has been an enduring source of inspiration and discussion to students of argumentation from all kinds of disciplinary background for more than forty years. (shrink)

This article explores an approach to initial teacher education which emphasises the process of 'practical theorising' as the context in which educational theory can contribute to this professional education. The practical theorising approach is exemplified by reference to the Oxford Internship Scheme, and the article focusses especially on arguments against a practical theorising approach presented by Paul Hirst in a commentary on the Oxford scheme. These arguments are concerned with: the need for a public rationally defended consensual body of professional (...) knowledge; the unreasonable demands which a practical theorising approach makes of student-teachers; and the perceived failure of a practical theorising approach, at least in the Oxford context, to differentiate adequately among different kinds of theory and their place in initial teacher education. (shrink)

Given an argumentation network with initial values to the arguments, we look for algorithms which can yield extensions compatible with such initial values. We find that the best way of tackling this problem is to offer an iteration formula that takes the initial values and the attack relation and iterates a sequence of intermediate values that eventually converges leading to an extension. The properties surrounding the application of the iteration formula and its connection with other numerical and non-numerical techniques proposed (...) by others are thoroughly investigated in this paper. (shrink)

For Socrates, philosophy is not like Christian conversion from error to truth, but rather it is like the pagan process whereby a young man is initiated into cult mysteries by a more experienced man - the mystagogos - who prepares him and leads him to the sacred precinct. In Greek cult religion, the mystagogos prepared the initiate for the esoteric mysteries revealed by the hierophant. Socrates treats traditional wisdom with scepticism, and this makes him appear ridiculous or dangerous in the (...) eyes of cultural conservatives. Nevertheless, his scepticism is not radical: custom is not something on which we must turn our backs if we are to pursue the truth. Socrates assumes an epistemology and employs a method by which he induces his companions to begin the critical and self-critical process of philosophical inquiry, not ignoring conventional wisdom, but thinking through and reinterpreting it as they make constructive progress towards the truth. He provides conclusive and convincing arguments in support of controversial answers to some of the most important moral questions he poses. (shrink)

Arguments, understood initially as premise-conclusion complexes of propositions, figure in our practices of giving reasons. Among other uses, we use arguments to advance reasons to explain why we believe or did something, to justify our beliefs or actions, to persuade others to do or to believe something, and (following Pinto 2001b) to advance reasons to worry or to fear that something is true. This book is about our uses of arguments to advance their premises as reasons for believing their conclusions, (...) i.e., as reasons for believing that their conclusions are true. The focus here is reason-giving centered on such reason-to-believe uses of arguments. Accordingly, the book does not discuss uses of arguments to advance their premises as reasons for believing that the conclusion is plausible, compelling, reasonable, nontrivial, helpful, plausibly deniable, or possible in principle. For ease of reference, hereafter I'll refer to uses of arguments to advance their premises as reasons for believing that their conclusions are true simply as reason-giving uses of argument. The book focuses on reason-giving uses of arguments that have three features, put briefly as follows. (shrink)

I review three existing arguments in favor of having some childcare done by nonparents and then I advance five arguments, most of them original, to the same conclusion. My arguments rely on the assumption that, no matter who provides it, childcare will inevitably go wrong at times. I discuss the importance of mitigating bad care, of teaching children how to enter caring relationships with people who are initially strangers to them, of addressing children's structural vulnerability to their caregivers, of helping (...) children and parents contain the ambivalent feelings of the child-parent relationship, and of distributing the responsibility of care and the ensuing blame for bad care more widely. I conclude that nonparental childcare should be universal. (shrink)

Current arguments to increase shareholder power in the large public U.S. corporation need to take account of the well-established historical practice of extensive delegation by shareholders of business decision-making and agenda-control to management and the board, what might be characterized as an absolute delegation rule. This practice sharply limits the power of shareholders to put either business or governance proposals to the shareholders for dispositive resolution. The paper, originally published in 1991 but newly relevant, argues that the rule is based (...) on potential pathologies in shareholder voting rather than the inherent information asymmetry between shareholders and managers. Rational shareholders who know of this asymmetry (and know that others know) would simply vote against most shareholder proposals. But shareholder voting gives rise to potential cycling problems, as shifting shareholder majorities vie for preferred policies, and potential opportunism, as shareholders engage in side deals with management and other shareholders to extract rents in corporate decision-making. Since shareholding patterns are in part a response to control rights, deviations from the absolute delegation rule will predictably lead to greater block ownership, for defensive and offensive reasons. These concerns need to be addressed in arguments for the expansion of shareholder power. (shrink)

I examine two arguments for nonconceptualism from the phenomenal character of perceptual experience. The idea is that only the assumption that experience content is nonconceptual does justice to the phenomenology of experience. In particular, if experience content is conceptual, we cannot account for its finely grained representational content. The problem is that visual color experience makes differences between shades of a color that are much more fine-grained than our conceptual repertoire allows. Further, conceptualism is incompatible with the situation-dependence of perceptual (...) content Kelly (Philos Phenomenol Res 62:601–608, 2001b). For instance, it is hard if not impossible to make room, in purely conceptual terms, for the difference between perceiving a certain shade of purple instantiated by a steel ball as compared to seeing it instantiated by a wool carpet. As to the argument from fineness of grain, I concede that the conceptualist’s demonstrative strategy against the argument is initially successful. However, it fails in the end because of problems with the phenomenal character of hallucination, which cannot be accounted for by appeal to only demonstrative concepts. As to the argument from situation-dependence, I point out that the conceptualist cannot convincingly account for the perceived presence, at the same time and in the same place, of situation-dependent and independent properties in experience. (shrink)

In a sequel to the author's argument for dualism from the lived experience of time, this paper continues the line of thought initiated by in that study a bit further by considering the implications of our experience of being in space for dualism. I conclude that four-dimensionalism cannot accommodate the facts of our experience of ourselves as being in time - localized in space but not located there after the manner of a material thing. Substance dualism, however, makes perfect (...) sense of all these facts, which helps confirm the natural presumption in favor of that view. REVISED: March 24, 2022 with substantive changes. (shrink)

The Doomsday Argument and the Simulation Argument share certain structural features, and hence are often discussed together. Both are cases where reflecting on one’s location among a set of possibilities yields a counter-intuitive conclusion—in the first case that the end of humankind is closer than you initially thought, and in the second case that it is more likely than you initially thought that you are living in a computer simulation. Indeed, the two arguments do have some structural similarities. (...) But there are also significant disanalogies between the two arguments, and I argue that these disanalogies mean that the Simulation Argument succeeds and the Doomsday Argument fails. (shrink)

In this paper I respond to separate criticisms by Bill Shaw (JBE, July 1988) and Richard Nunan (JBE, December 1988) of my paper A Critique of Milton Friedman's Essay The Social Responsibility of Business Is to Increase Its Profits (JBE, August 1986). Professors Shaw and Nunan identify several points where my argument could benefit from clarification and improvement. They also make valuable contributions to the discussion of the broad issue area of whether and to what extent business should exercise (...) moral initiative.My objectives are (1) to show, with the aid of examples (inspired by Shaw) and the addition of one point of correction (inspired by Nunan), that my disapproving critique of Friedman's famous argument remains sound, (2) to show that Professor Shaw's argument contains serious problems, and (3) to build on the base laid by my critics by developing important reasons why business should exercise moral initiative. (shrink)

We draw out significant consequences of a relatively popular theory of metaphysical modality—branching actualism—for cosmological arguments for God’s existence. According to branching actualism, every possible world shares an initial history with the actual world and diverges only because causal powers (or dispositions, or some such) are differentially exercised. We argue that branching actualism undergirds successful responses to two recent cosmological arguments: the Grim Reaper Kalam argument and a modal argument from contingency. We also argue that branching actualism affords (...) a response to one popular defense of the classic contingency argument. What results are new difficulties for several cosmological arguments arising from the metaphysics of modality. (shrink)

Ontological arguments like those of Gödel (1995) and Pruss (2009; 2012) rely on premises that initially seem plausible, but on closer scrutiny are not. The premises have modal import that is required for the arguments but is not immediately grasped on inspection, and which ultimately undermines the simpler logical intuitions that make the premises seem plausible. Furthermore, the notion of necessity that they involve goes unspecified, and yet must go beyond standard varieties of logical necessity. This leaves us little reason (...) to believe the premises, while their implausible existential import gives us good reason not to. (shrink)

There are two principles that lend Brouwer's mathematics the extra power beyond arithmetic. Both are presented in Brouwer's writings with little or no argument. One, the principle of bar induction, will not concern us here. The other, the continuity principle for numbers, occurs for the first time in print in [4]. It is formulated and immediately applied to show that the set of numerical choice sequences is not enumerable. In fact, the idea of the continuity property can be dated (...) fairly precisely, it is to be found in the margin of Brouwer's notes for his course on Pointset Theory of 1915/16. The course was repeated in 1916/17 and he must have inserted his first formulation of the continuity principle in the fall of 1916 as new material right at the beginning of the course.In modern language, the principle readswhere α and β range over choice sequences of natural numbers, m and x over natural numbers, and stands for ⟨α, α, …, α⟩, the initial segment of α of length m.An immediate consequence of WC-N is that all full functions are continuous, and, as a corollary, that the continuum is unsplittable [28]. Note that WC-N is incompatible with Church's thesis, [22], section 4.6.After Brouwer asserted WC-N, Troelstra was the first to ask in print for a conceptual motivation, but he remained an exception; most authors followed Brouwer by simply asserting it, cf. [18].Let us note first that in one particular case the principle is obvious indeed, namely in the case of the lawless sequences. The notion of lawless sequence surfaced fairly late in the history of intuitionism. Kreisel introduced it in [17] for metamathematical purposes. There is a letter from Brouwer to Heyting in which the phenomenon also occurs [7]. This is an important and interesting fact since it is the only time that Brouwer made use of a possibility expressly stipulated in, e.g., [5], see below. (shrink)

Dung’s (1995) argumentation framework takes as input two abstract entities: a set of arguments and a binary relation encoding attacks between these arguments. It returns acceptable sets of arguments, called extensions, w.r.t. a given semantics. While the abstract nature of this setting is seen as a great advantage, it induces a big gap with the application that it is used to. This raises some questions about the compatibility of the setting with a logical formalism (i.e., whether it is possible to (...) instantiate it properly from a logical knowledge base), and about the significance of the various semantics in the application context. In this paper we tackle the above questions. We first propose to fill in the previous gap by extending Dung’s (1995) framework. The idea is to consider all the ingredients involved in an argumentation process. We start with the notion of an abstract monotonic logic which consists of a language (defining the formulas) and a consequence operator. We show how to build, in a systematic way, arguments from a knowledge base formalised in such a logic. We then recall some basic postulates that any instantiation should satisfy. We study how to choose an attack relation so that the instantiation satisfies the postulates. We show that symmetric attack relations are generally not suitable. However, we identify at least one ‘appropriate’ attack relation. Next, we investigate under stable, semi-stable, preferred, grounded and ideal semantics the outputs of logic-based instantiations that satisfy the postulates. For each semantics, we delimit the number of extensions an argumentation system may have, characterise the extensions in terms of subsets of the knowledge base, and finally characterise the set of conclusions that are drawn from the knowledge base. The study reveals that stable, semi-stable and preferred semantics either lead to counter-intuitive results or provide no added value w.r.t. naive semantics. Besides, naive semantics either leads to arbitrary results or generalises the coherence-based approach initially developed by Rescher and Manor (1970). Ideal and grounded semantics either coincide and generalise the free consequence relation developed by Benferhat, Dubois, and Prade (1997), or return arbitrary results. Consequently, Dung’s (1995) framework seems problematic when applied over deductive logical formalisms. (shrink)

ONE OF THE MOST prominent theorists of anarcho-capitalism is Hans- Hermann Hoppe. In what is perhaps his most famous result, the argumentation ethic for libertarianism, he purports to establish an a priori defense of the justice of a social order based exclusively on pri- vate property. Hoppe claims that all participants in a debate must presuppose the libertarian principle that every person owns himself, since the principle underlies the very concept of argumentation. Some libertarians (e.g., Rothbard 1988) have celebrated Hoppe’s (...) argument as the final nail in the coffin for collectivism of any type; following Hoppe, they believe that to deny the libertarian ethic is not only wrong, but also internally contradictory. On the other hand, a number of other prominent libertarians characterized Hoppe’s initial statement of his case as “one muddle after another” (Steele 1988, p. 47) or “a tissue of bald assertions” (Yeager 1988, p. 45). (shrink)

In this article we present a training program based on the empirical research conducted in the project 'argumentational integrity'. After a brief sketch of the problem dimensions concerning unfair argumentation we give an overview of the training concept and the underlying empirical research. Exemplification of the instructional design is given for the second and the fifth training dimension (standards of argumentational integrity and reactions to unfair contributions). Finally we indicate how the training is to be evaluated and present initial results (...) demonstrating that in comparison with an untrained control group participants in the training significantly improve their skills in identifying and naming argumentative rule violations. (shrink)

The aim of this paper is to describe the way in which argumentative patterns come into being in plenary debate over legislative issues in the European Parliament. What kind of argumentative patterns are to be expected within this macro context? It is shown that the argumentative patterns that come into being in legislative debate in the European Parliament depend for the most part on the problem-solving argumentation that is put forward in the opening speech by the rapporteur of the parliamentary (...) committee report. This argumentation can be pragmatic problem-solving argumentation or complex problem-solving argumentation. The most important prototypical argumentative patterns are investigated in the argumentation put forward by the Members of parliament. This investigation is based on an inventory of the arguments that can in principle be used to support or attack the initial problem-solving argumentation put forward by the rapporteur. (shrink)

Contemporary argument studies in Poland began with the research of the Lvov-Warsaw School and its successors in Artificial Intelligence and legal theory, as well as with the studies of Polish rhetoricians . The last decade has witnessed a major transformation in the Polish landscape, beginning with several landmark publications which have attracted an ever-growing number of young researchers and students. As a result, the research movement of the Polish School of Argumentation has begun to emerge .In 2008, the nationwide (...) initiative ArgDiaP was established in order to provide infrastructure facilitating the networking process and to foster res .. (shrink)

The modal ontological argument (MOA) proceeds from God’s possible existence to God’s actual existence. A prominent objection to the MOA is that it suffers from a symmetry problem: an exactly parallel modal ontological argument can be given for God's non-existence. Several attempts have been made to break the symmetry between the arguments. This draft is a mostly comprehensive survey of those attempts. -/- The draft was initially written as a supplement to the 2024 Summer edition of the SEP (...) entry on Ontological Arguments. However, the draft is not included in the SEP entry. (shrink)

© The Authors 2017. Published by Oxford University Press on behalf of The Analysis Trust. All rights reserved. For Permissions, please email: [email protected] of the central goals of Propositions is to argue that propositions exist. My plan for the following is to explore the options for Merricks’s opponents. I’m not sure whether, in the end, they have any entirely satisfactory strategy, but the discussion will still be of some interest. At least I hope to achieve some clarification of the initial (...) arguments of the book and to prompt Merricks to elaborate on a few issues. Before continuing, I should say that I found many other challenging arguments throughout the book as well as much to agree with. I focus on the first chapter due to its foundational status with respect to the rest of the book, but every chapter... (shrink)

Professor Robert Alexy wrote a book whose avowed purpose is to refute the basic tenets of a type of legal theory which 'has long since been obsolete in legal science and practice'. The quotation is from the German Federal Constitutional Court in 1968. The fact that Prof Alexy himself mentions no writings in the legal positivist tradition [in English] later than Hart's The Concept of Law (1961) may suggest that he shares the court's view. The book itself may be evidence (...) to the contrary. After all why flog a dead horse? Why write a book to refute a totally discredited theory? Perhaps Alexy was simply unlucky. The burst of reflective, suggestive and interesting writings in the legal positivist tradition reached serious dimensions only in the years after the original publication of his book, when Waldron, Marmor, Gardner, Leiter, Shapiro, Murphy, Himma, Kramer, Endicott, Lamont, Dickson, Bix and others joined those who had made important contributions to legal theory in the positivistic tradition in the years preceding the original publication of Alexy's book: Lyons, Coleman, Campbell, Harris, Green, Waluchow and others, who are still among the main contributors to legal theory in the positivist tradition. It is a great shame that nothing in these writings influenced the arguments of the book. Perhaps this regret is misplaced. After all ‘positivism' in legal theory means, and always did mean, different things to different people. What Radbruch, one of Alexy's heroes, meant when he first saw himself as a legal positivist and then recanted was not the same as what 'legal positivism' means in Britain (and nowadays in the United States as well) among those who engage in philosophical reflection about the nature of law. Perhaps Alexy is simply addressing himself to a German audience, and refuting, or attempting to refute, legal theories of a kind identified in Germany as 'legal positivism'. Perhaps, though his references to Hart show that he does not intend it that way. My aims in this chapter are, however, reasonably clear. My main purpose is to explore whether any of Alexy's arguments challenge any of the views which I have advocated. Subsidiary aims are, first, to clarify why what Alexy says is legal positivism is not what is understood as such in the English speaking world, so that some of Alexy's sound points find no target; secondly, to try and clarify some of his arguments which I found, at least initially, rather obscure. Given the prominence of Alexy's book I will refer only to it, and will not consider his other publications. (shrink)

I defend the conception of musical works as indicated temporally initiated types against Julian Dodd's recent argument that all types are eternal and uncreated. In doing so, I develop a new account of both cultural and natural types. While types are in a certain sense determined by the properties that underlie them, not all properties determine types; and properties such as being indicated by Beethoven exist only once the temporally initiated entities that those properties essentially involve exist. A cultural (...) type such as Beethoven's Fifth Symphony is a sound pattern that has the essential property of being used in the way specified by Beethoven's singling out of that pattern. (Natural types, such as bird songs or biological species, are patterns having places in actual causal chains in nature.) Given this framework, the Fifth Symphony is an indicated type that was, in a straightforward literal sense, created by Beethoven in 1804–1808. (shrink)