Abstract This paper addresses the role that argumentation schemes and argument visualization software tools can play in helping to find and counter objections to a given argument one is confronted with. Based on extensive analysis of features of the argumentation in these two examples, a practical four-step method of finding objections to an argument is set out. The study also applies the Carneades Argumentation System to the task of finding objections to an argument, and shows how (...) this system has some capabilities that are especially useful. Content Type Journal Article Pages 1-23 DOI 10.1007/s10503-012-9261-z Authors Douglas Walton, Centre for Research in Reasoning, Argumentation and Rhetoric (CRRAR), University of Windsor, 2500 University Ave. W., Windsor, ON N9B 3Y1, Canada Journal Argumentation Online ISSN 1572-8374 Print ISSN 0920-427X. (shrink)

In his recent Philosophers’ Imprint paper “The (mostly harmless) inconsistency of knowledge attributions” [Weiner, 2009], Matt Weiner argues that the semantics of the expression “knows that”, as it is used in attributions of knowledge like “Hannah knows that the bank will be open,” are inconsistent, but that this inconsistency is “mostly harmless.” He presents his view as an alternative to the invariantist, contextualist and relativist approaches currently prevalent in the literature, (e.g. [Stanley, 2005], [DeRose, 1995], [Hawthorne, 2006], [MacFarlane, 2005]) (...) and argues that it avoids important disadvantages of each. Yet in calling the supposed inconsistency of knowledge attributions “mostly harmless”, Weiner implies that his view does not have new disadvantages of its own. My purpose in the present paper is to argue that the inconsistency and harmlessness theses cannot be jointly maintained: if we accept that the semantics of ‘know’—or indeed any word—are inconsistent, then we face a dilemma: one horn is dialetheism, the view that there there are true contradictions, the other is the view that that semantic competence in English requires belief in, or similar commitment to, falsehoods. I will argue that neither of these options is well described as “mostly harmless.” The paper is structured as follows: in the first part I present Weiner’s view and his arguments for it. Then in section 2 I compare the question of whether the semantics of ‘knows that’ are inconsistent to the much older controversy over whether the semantics of the expression ‘is true’ are inconsistent. In section 3 I will present Hans Herzberger’s arguments from the 1960s for thinking that no expression in a natural language can have inconsistent semantics. Finally, in section 4 I argue that although Herzberger’s argument seems anachronistic today, both contemporary ways of avoiding his conclusion have significant disadvantages. (shrink)

Do inconsistent laws, which are in the form of inconsistent legal obligations, provide us with good reasons for accepting the possibility of legal gluts, which are true legal statements whose negations are also true? Given the contingencies of the law, it is unlikely that many will deny the possibility of inconsistent legal obligations, but it remains an ongoing debate whether these lead to any legal gluts. In a recent debate, Graham Priest [Priest, G. 2006. In ‘Contradiction’. In (...) First printed by Martinus Nijhoff in 1987. 2nd ed. Oxford: Oxford University Press; Priest, G. 2017. ‘Where Laws Conflict: An Application of the Method of Chunk and Permeate’. In Law and the New Logics, edited by H. Glenn, and L. Smith, 168–180. Cambridge: Cambridge University Press] has argued from inconsistent obligations to legal gluts and JC Beall [Beall, JC 2017. ‘On inconsistent laws and gluts’. In Law and the New Logics, edited by H. Glenn, and L. Smith, 199–207. Cambridge: Cambridge University Press.], while he has acknowledged that there are inconsistent obligations, has argued against Priest’s arguments for legal gluts. In this paper, after reviewing the debate, I adjudicate it and provide reasons for resisting Beall’s arguments again Priest thereby providing a possibility for legal gluts. (shrink)

In section I, I argue that the principal reason why inconsistency is a fault is that it involves having at least one false belief. In section 2, I argue that inconsistency need not be a serious epistemic fault. The argument in section 2 is based on the notion that what matters epistemically is always in the final analysis an item's effect on attaining the goal of truth. In section 3 I describe two cases in which it is best (...) class='Hi'>from an epistemic point of view to knowingly retain inconsistent beliefs. In section 4 my goal is to put into perspective the charge that relativism ought to be rejected because it involves one in inconsistency. (shrink)

This article explores the modalities by which referring to past discursive performance of adversaries within a continuous polemical exchange is used in ad hominem attacks. Our starting point holds that in the context of lengthy debates, participants and third-party listeners share a rhetorical memory, which, dynamic and subjective as it may be, allows for the evaluation of participants’ characters based on their perceived discursive performances. By analysing opinion articles related to the Israeli political debate, this study shows how drawing inference (...) from adversaries’ prior statements and conduct is used to compromise their credibility as participants in the polemical exchange. It is found that, alongside supporting arguments from inconsistent commitment, previous discursive performance is mobilized to discredit speakers’ epistemic authority and their moral legitimacy. (shrink)

According to Peter van Inwagen, C. S. Lewis failed in his attempt to undermine naturalism with his Argument from Reason. According to van Inwagen, Lewis provides no justification for his central premise, that naturalism is inconsistent with holding beliefs for reasons. What is worse, van Inwagen argues that the main premise in Lewis's argument from reason is false. We argue that it is not false. The defender of Lewis's argument can make use of the (...) problem of mental causal drainage, a longstanding issue in philosophy of mind, to show how van Inwagen's objection fails. (shrink)

‘Performative’ transcendental arguments exploit the status of a subcategory of self-falsifying propositions in showing that some form of skepticism is unsustainable. The aim of this paper is to examine the relationship between performatively inconsistent propositions and transcendental arguments, and then to compare performative transcendental arguments to modest transcendental arguments that seek only to establish the indispensability of some belief or conceptual framework. Reconceptualizing transcendental arguments as performative helps focus the intended dilemma for the skeptic: performative transcendental arguments directly confront (...) the skeptic with the choice of abandoning either skepticism or some other deep theoretical commitment. Many philosophers, from Aristotle and St. Thomas Aquinas to Jaakko Hintikka, C.I. Lewis, and Bernard Lonergan, have claimed that some skeptical propositions regarding knowledge, reason, and/or morality can be shown to be self-defeating; that is to say, they have claimed that the very upholding of some skeptical position is in some way incompatible with the position being upheld, or with the implied, broader dialectical position of the skeptic in question. Statements or propositions alleged to have this characteristic also sometimes are called ‘self-falsifying,’ ‘self-refuting,’ ‘self-stultifying,’ ‘self-destructive,’ or ‘pointless.’ However, proponents of the strategy of showing skepticism to be self-defeating have not in general adequately distinguished between two types of self-defeating proposition: self-falsifying and self-stultifying. In the first part of this paper I distinguish between self-falsifying and self-stultifying propositions, and introduce the notion of performative self-falsification. In the second part I discuss classical transcendental arguments, ‘modest’ transcendental arguments, and objections to each. In the third part I introduce two types of transcendental argument—each labeled “performative”—corresponding to two types of performatively self-falsifying proposition, and I compare them to modest transcendental arguments. (shrink)

The anti-realist argument from underconsideration focuses on the fact that, when scientists evaluate theories, they only ever consider a subset of the theories that can account for the available data. As a result, when scientists judge one theory to be superior to competitor theories, they are not warranted in drawing the conclusion that the superior theory is likely true with respect to what it says about unobservable entities and processes. I defend the argument from underconsideration (...) class='Hi'>from the objections of Peter Lipton. I argue that the inconsistency that Lipton claims to find in the argument vanishes once we understand what the anti-realist means when she claims that scientists are reliable. I also argue that collapsing the distinction between relative and absolute evaluations, as Lipton recommends, has its costs. Finally, I briefly examine Richard Boyd's influential defence of realism. (shrink)

In this paper, we present what we call the argument from accidental truth, according to which some instances of deflationist schemata, even those carefully reformulated and adjusted by Field and Horwich to accommodate the truth of utterances, are falsified due to accidental truths. Since the folk concept of truth allows for accidental truths, the deflationary theory of truth will face a serious problem. In particular, it follows that the deflationist schema fails to capture the proper extension of truth (...) by precluding accidental truths of utterances. Even though the argument uses the contextualist cases, this conclusion does not require so much as the truth of contextualism, but only two assumptions, the existence of context-relative non-literal contents of utterances (or speech acts), and the existence of accidental truths, both of which are widely accepted by folks and theorists. We will also consider various responses to the argument, including the revisionary deflationist position, all of which we argue are unsatisfactory or committed to a highly implausible view. (shrink)

In an attempt to revive discussion of the argument from illusion this paper amends the classic version of the argument to avoid Austin's main objection. It then develops and defends a version of the intentional object reply to the argument, arguing that an "unendorsed story" account of reports of dreams and hallucinations avoids commitment to nonexistent objects.

Arguments about temporal becoming often get nowhere. One reason for the impasse lies in the fact that the issue has been formulated as a choice between science on the one hand and common sense (or ordinary language) on the other as the primary source of ontological commitment.' Often' proponents of attributing temporal becoming to the physical universe look to everyday temporal concepts, find them infested with notions involving temporal becoming and conclude that becoming is a basic feature of the (...) physical world. Their opponents may look to physical science, find no reference to temporal becoming and conclude that becoming is not part of the extramental universe.2 Thus construed, the issue of temporal becoming is not directly amenable to argument. This stalemate will be broken, however, if I accomplish my aim: to (re)formulate the question of temporal becoming so that it is subject to adjudication; to show how objections to the thesis of the mind-dependence of becoming can fruitfully be seen (and in a sense unified) as attacks on a single argument for the thesis, an argument from physics; and to defend the con'elusion of the argument from physics from heretofore unanswered objections. The question of the status of temporal becoming is the question of the status of past, present and future.' Events which are at one time in the future, are said to become present and subsequently to recede into the past. Since past and future can be defined as 'earlier than now' and 'later than.. (shrink)

It is widely agreed that the ‘Logical’ Argument from Evil (LAFE) is bankrupt. We aim to rehabilitate the LAFE, in the form of what we call the Normatively Relativised Logical Argument from Evil (NRLAFE). There are many different versions of a NRLAFE. We aim to show that one version, what we call the ‘right relationship’ NRLAFE, poses a significant threat to personal-omniGod-theism—understood as requiring the belief that there is an omnipotent, omniscient, perfectly good person who has (...) created our world—because it appeals to value commitments theists themselves are likely to endorse. The ultimate success of this NRLAFE will rest on developing a theological ethics of right relationship that rejects as morally flawed the exercise of omnipotence first to sustain horrors and then to redeem them. Yet a vindicated NRLAFE of this sort need not require atheism, but only rejection of the standard conception of God as a personal omniGod. (shrink)

It has been argued by some that the argument from vagueness is one of the strongest arguments in favor of the theory of temporal parts. I will neither support nor dispute this claim here. Rather, I will present a version of the argument from vagueness, which – if successful – commits one to the existence of modal parts. I argue that a commitment to the soundness of the argument from vagueness for temporal parts (...) compels one to commit to the soundness of the argument from vagueness for modal parts. I say compels, but not entails; an objection to one of the arguments highlights analogous ways to reject the other, making it difficult to endorse one and reject the other. This would be a significant conclusion, if true, since there are far fewer who currently commit themselves to modal parts than the many who currently commit themselves to temporal parts. (shrink)

This chapter focuses on one of the common fallacies in Western philosophy, argument from fallacy. Also known as argumentum ad logicam, argument to logic, fallacy fallacy, and fallacist's fallacy, the argument from fallacy occurs when one reasons that because the argument for some conclusion is fallacious, the conclusion of that argument is false. Truth and falsity are features of claims. Fallacies are errors in reasoning, not errors about truth or falsity. That is, if (...) someone has committed a fallacy, then he has made an error in reasoning; but it does not follow that he has made a factual error. As a deductive argument, fallacy of affirming the consequent is invalid ‐ one cannot draw/infer the conclusion from the premises ‐ and yet the conclusion is true. As such, it should be clear that poor reasoning (committing a fallacy) does not entail a false conclusion. (shrink)

This paper is concerned with a recent, clever, and novel argument for the need for genuine collectives in our ontology of agents to accommodate the kinds of normative judgments we make about them. The argument appears in a new paper by David Copp, "On the Agency of Certain Collective Entities: An Argument from 'Normative Autonomy'" (Midwest Studies in Philosophy: Shared Intentions and Collective Responsibility, XXX, 2006, pp. 194-221; henceforth ‘ACE’), and is developed in Copp’s paper for (...) this special journal issue, “The Collective Moral Autonomy Thesis” (henceforth ‘CAT’). The argument goes as follows. -/- (1) We correctly assign blame (or obligations) to collectives in circumstances in which it would be a mistake to assign any (relevantly related) blame (or obligations) to their members. (2) If (1), then collectives are genuine agents over and above their members. (3) Therefore, collectives are genuine agents over and above their members. -/- Following Copp, I call (1) the Collective Moral Autonomy Thesis (CMA). Copp argues for CMA primarily by appeal to cases, but also offers two general arguments for it. In the cases that Copp describes, we are to judge that a collective act is blameworthy, though each member of the group that acts is blameless because he is merely following procedures appropriate for his participation, or because there are excusing factors, or because of overriding personal duties. -/- I argue that the case for CMA has not been made. In particular, I argue that, in each case in which we feel inclined to hold a group responsible for something but not its members, it is because -/- 1. we have accepted a false dilemma, that when no one agent is fully responsible for the action of a group of which he is a member, the only entity that could be responsible is the group as such, or 2. we have directed our attention to the wrong individual or individuals, or 3. we have become confused about the commitments of the individuals, or 4. we have mistaken ameliorating for excusing factors, or 5. we have mistaken moral blameworthiness and all-in rational blameworthiness, or 6. a combination of these things. (shrink)

The consensus is that repeatable artworks cannot be identified with particular material individuals. A perennial temptation is to identify them with types, broadly construed. Such identification, however, faces the so-called “Creation Problem.” This problem stems from the fact that, on the one hand, it seems reasonable to accept the claims that (1) repeatable artworks are types, (2) types cannot be created, and (3) repeatable artworks are created, but, on the other hand, these claims are mutually inconsistent. A possible (...) solution to the Creation Problem is to argue that claim (2) can be rejected because (a) the only motivation for it is that a type, being abstract, cannot stand in causal relations, but (b) this motivation is ungrounded, since types can, in fact, stand in such relations. Clearly, in order for this solution to be successful, it is necessary to substantiate the possibility of types to be causally efficacious. In this essay, I examine an attempt to do this with the help of Yablo’s principle of proportionality, which has been undertaken by Walters (2013) and, more recently, Juvshik (2018). Although the argument they advance may seem to provide strong support for the causal efficacy of types, I think it actually fails to do this. To explain why this is so, I first show that this argument commits us to the existence of widespread causal overdetermination involving types and then argue that this commitment is both epistemically and ontologically problematic. (shrink)

Marginal humans are not rational yet we still think they are morally considerable. This is inconsistent with denying animals moral status on the basis of their irrationality. Therefore, either marginal humans and animals are both morally considerable or neither are. In this paper I consider a major objection to this argument: that species is a relevant difference between humans animals.

Epistemic contextualism was originally motivated and supported by the response it provides to skeptical paradox. Although there has been much discussion of the contextualist response to skeptical paradox, not much attention has been paid to the argument from skepticism for contextualism. Contextualists argue that contextualism accounts for the plausibility and apparent inconsistency of a set of paradoxical claims better than any classical invariantist theory. In this paper I focus on and carefully examine the argument from skepticism (...) for contextualism. I argue not only that the prima facie advantage of contextualism is specious, but also that contextualism is in fact at a competitive disadvantage with respect to two classical invariantist views. I also argue that contextualism takes an arbitrary and unsatisfying strategy in its response to skepticism. That contextualism is alone in taking this arbitrary strategy marks a second competitive disadvantage for it. In addition, I argue that the contextualist response to skeptical paradox regenerates a skeptical paradox which contextualism is powerless to solve. Consequently, the argument from skepticism for contextualism fails. Furthermore, this feature of the contextualist response to skeptical paradox completely undermines the motivation and support for contextualism deriving from its treatment of skeptical paradox. I conclude that the argument from skepticism for contextualism fails, and that the contextualist response to skeptical paradox fails to motivate contextualism, pending the success of another argument for the contextualist thesis. (shrink)

In his recent book Abortion and Unborn Human Life, Patrick Lee develops an argument for foetal personhood based on intrinsic value. Lee argues that since the foetus is identical with the rational, self‐conscious being who will exist a few years later, and since this rational, self‐conscious being indisputably is intrinsically valuable, therefore the foetus must already be intrinsically valuable; for nothing can come to be at one time but become intrinsically valuable at another. I show that this argument (...) fails on two counts. First, the crucial premise that a thing’s intrinsic value must derive from its essential properties is question‐begging and devoid of support. Second, that premise is inconsistent with the pro‐life position. (shrink)

New Volitionalism is a name for certain widespread conception of the nature of intentional action. Some of the standard arguments for New Volitionalism, the so-called arguments from total failure, have even acquired the status of basic assumptions for many other kinds of philosophers. It is therefore of singular interest to investigate some of the most important arguments from total failure. This is what I propose to do in this paper. My aim is not be to demonstrate that these (...) arguments are inconsistent or that total failure and naked tryings are metaphysically impossible. Rather, my aim is be to build a case against the possibility of naked, independently existing tryings, by questioning how well we understand the scenarios invoked in their favour. Thus, rather than attempting to present a definitive metaphysical refutation of New Volitionalism, I attempt to diminish or demolish its underlying motivation. (shrink)

Intellectualism is the claim that practical knowledge or ‘know-how’ is a kind of propositional knowledge. The debate over Intellectualism has appealed to two different kinds of evidence, semantic and scientific. This paper concerns the relationship between Intellectualist arguments based on truth-conditional semantics of practical knowledge ascriptions, and anti-Intellectualist arguments based on cognitive science and propositional representation. The first half of the paper argues that the anti-Intellectualist argument from cognitive science rests on a naturalistic approach to metaphysics: its proponents (...) assume that findings from cognitive science provide evidence about the nature of mental states. We demonstrate that this fact has been overlooked in the ensuing debate, resulting in inconsistency and confusion. Defenders of the semantic approach to Intellectualism engage with the argument from cognitive science in a way that implicitly endorses this naturalistic metaphysics, and even rely on it to claim that cognitive science support Intellectualism. In the course of their arguments, however, they also reject that scientific findings can have metaphysical import. We argue that this situation is preventing productive debate about Intellectualism, which would benefit from both sides being more transparent about their metaphilosophical assumptions. (shrink)

In this essay for a PPR book symposium on Theodore Sider's _Four-Dimensionalism<D>, I focus on two of Sider's arguments for four-dimensionalism: (i) his argument from vagueness, and (ii) his argument from time travel. Concerning (i), I first show that Sider's argument commits him to certain strange consequences that many four-dimensionalists may not endorse, and then I discuss an objection that involves appealing to 'brutal composition', the view that there is no informative answer to Peter van (...) Inwagen's 'special composition question'. Concerning (ii), I argue that the three-dimensionalist can account for time travel scenarios in a way that is analogous to Sider's four-dimensionalist account of such scenarios. (shrink)

Some philosophers have argued that the paucity of evidence for theism — along with basic assumptions about God's nature — is ipso facto evidence for atheism. The resulting argument has come to be known as the argument from divine hiddenness. Theists have challenged both the major and minor premises of the argument by offering defences. However, all of the major, contemporary defences are failures. What unites these failures is instructive: each is implausible given other commitments shared (...) by everyone in the debate or by theists in particular. Only challenges which are plausible given both common sense and other theistic commitments will undermine the argument from divine hiddenness. Given that such defences universally fail, the best hope for a successful challenge to the argument comes from more general sceptical responses. This sort of response is briefly sketched and defended against four independent objections. (shrink)

Several prominent philosophers have argued that the fact that depressed agents sometimes make moral judgments without being appropriately motivated supports Humean externalism – the view that moral motivation must be explained in terms of desires that are distinct from or “external” to an agent’s motivationally inert moral judgments. This essay argues that such motivational failures do not, in fact, provide evidence for this view. I argue that, if the externalist argument from depression is to undermine a philo-sophically (...) important version of internalism, it must make use of a general assumption about motivational states. However, at a reasonable level of abstraction, the needed assumption also implies that even desires could not be effective sources of motivation. For, just as depressed agents might sometimes lack motivation to act consistently with their moral judgments, they also sometimes lack motivation to pursue their desires. Moreover, the most plausible responses that Humeans can give to this general argument undermine the externalist case against internalism. Thus, there is a deep tension between the argument from depression for externalism and a fundamental Humean commitment. (shrink)

In a recent Analysis article, Quentin Smith argues that classical theism is inconsistent with certain consequences of Stephen Hawking's quantum cosmology.1 Although I am not a theist, it seems to me that Smith's argument fails to establish its conclusion. The purpose of this paper is to show what is wrong with Smith's argument. According to Smith, Hawking's cosmological theory includes what Smith calls "Hawking's wave function law." Hawking's wave function law (hereafter, "HL") apparently has, among its consequences, (...) the following claim. (1) The unconditional probability that a universe like this one - i.e., a universe with the metric hij and matter field Φ - should begin to exist is 95%.2 Smith then argues that the theist who accepts HL must also accept that the following sentence was once true.3.. (shrink)

According to Epistemic Two-Dimensional Semantics (E2D), expressions have a counterfactual intension and an epistemic intension. Epistemic intensions reflect cognitive significance such that sentences with necessary epistemic intensions are a priori. We defend E2D against an influential line of criticism: arguments from epistemic misclassification. We focus in particular on the arguments of Speaks [2010] and Schroeter [2005]. Such arguments conclude that E2D is mistaken from (i) the claim that E2D is committed to classifying certain sentences as a priori, and (...) (ii) the claim that such sentences are a posteriori. We aim to show that these arguments are unsuccessful as (i) and (ii) undercut each other. One must distinguish the general framework of E2D from a specific implementation of it. The framework is flexible enough to avoid commitment to the apriority of any particular sentence; only specific implementations are so committed. Arguments from epistemic misclassification are therefore better understood as arguments for favouring one implementation of E2D over another, rather than as refutations of E2D. (shrink)

Hubert Dreyfus has defended a novel view of agency, most notably in his debate with John McDowell. Dreyfus argues that expert actions are primarily unreflective and do not involve conceptual activity. In unreflective action, embodied know-how plays the role reflection and conceptuality play in the actions of novices. Dreyfus employs two arguments to support his conclusion: the argument from speed and the phenomenological argument. I argue that Dreyfus's argumentative strategies are not successful, since he relies on a (...) dubious assumption about concepts and reflection. I suggest that Dreyfus is committed to a minimal view of conceptuality in action. (shrink)

J. L. Mackie argued that moral thought and discourse involve commitment to an especially robust kind of normativity, which is too weird to exist. Thus, he concluded that moral thought and discourse involve systematic error. Much has been said about this argument in the last four decades or so. Nevertheless, at least one version of Mackie’s argument, specifically the one focusing on the intrinsic weirdness of the relevant kind of normativity, has not been fully unpacked. Thus, more (...) needs to be said about the issue of how to interpret Mackie’s argument. Moreover, I argue that by looking closely at Mackie’s discussion, we can extract two distinct versions of the argument which together present a tougher, and also more precise, challenge for moral realism than extant versions. In this paper I thus revisit Mackie’s discussion with an eye to making progress on an important issue in contemporary metaethics. (shrink)

Recent disputes :57–79, 2013; Mizrahi in Inform Logic 36:238–252, 2016; Mizrahi in Argumentation 32:175–195, 2018; Seidel in Inform Logic 34:192–218, 2014; Seidel in Inform Logic 36:253–264, 2016; Hinton in Inform Logic 35:539–554, 2015) on the strength of arguments from expert opinion give rise to a potential legitimacy crisis of it. Mizrahi :57–79, 2013; Inform Logic 36:238–252; Argumentation 32:175–195, 2018) claims that AEO are weak arguments by presenting two independent arguments. The first argument is that AEO are weak arguments (...) because empirical studies show that expert opinions p do not make p significantly more likely to be true. The second argument is that AEO are weak arguments because empirical studies show that expert opinions are susceptible to the kinds of cognitive biases that novice opinions are susceptible to. In this paper, I intend to argue that Mizrahi’s two arguments both fail because of inconsistency, irrelevance, and insufficiency. Nevertheless, Mizrahi’s arguments help to evaluate AEO better by expanding the relevant critical questions. (shrink)

According to objectivism about the practical 'ought', what one ought to do depends on all the facts; according to perspectivism, it depends only on epistemically available facts. This essay presents a new argument against objectivism. The first premise says that it is at least sometimes possible for a normative theory to correctly guide action. The second premise says that, if objectivism is true, this is never possible. From this it follows that objectivism is false. Perspectivism, however, turns out (...) to be compatible with the plausible assumption about guidance. I defend the two premises on the basis of an account of what it is for a normative theory to guide action. Central to this account is the idea that correct action-guidance involves correct practical reasoning from a normative theory to an action, which requires that agents have the capacity to believe for the right reasons. Since objectivists about the practical 'ought' are committed to objectivism about the epistemic 'ought', it follows that agents lack this capacity and so are in principle unable to be correctly guided by a normative theory. This shows that recent attempts to reconcile objectivism with action-guidance are unsuccessful, which all assume that, if objectivism is true, it is at least sometimes possible for a normative theory to correctly guide action. (shrink)

The Argument from Principles, the primary motivation for impurism or pragmatic encroachment theories in epistemology, is often presented as an argument for everyone—an argument that proceeds from harmless premises about the nature of rationally permissible action to the surprising conclusion that one’s knowledge is partly determined by one’s practical situation. This paper argues that the Argument from Principles is far from neutral, as it presupposes the falsity of one of impurism’s main competitors: (...) epistemic contextualism. As a consequence, hybrid positions combining impurism and contextualism—positions that impurists have sometimes hinted at in the literature—are, while logically consistent, ill-motivated. Once the impurist embraces contextualism, the Argument from Principles can no longer get off the ground. The paper concludes that those who make use of the Argument from Principles are committed to an invariantist impurism and their case in support of impurism can only ever be as strong as their case against contextualism. Given recent contextualist work on the semantics of ‘knowledge’-attributions, this is likely to turn out problematic for the impurists. (shrink)

The ontological argument from reason aims to show that deliberative reasoning cannot be located in a naturalistic ontology, because such reasoning requires a unified, enduring self with libertarian free will. The most popular way of avoiding this argument is to claim that some version of naturalistic compatibilism suffices for human reason, because even in a world of event causation, some creatures may be responsive to reason. In this paper, I argue that the best versions of this approach (...) either smuggle in nonnaturalistic commitments or else cannot distinguish between compulsive rationality merely occurring in someone’s brain from reasoning an agent does. (shrink)

A question of interpersonal sovereignty dating back to the early modern era has resurfaced in contemporary political philosophy: viz. Should one individual have, prior to any consent, property rights in another person? Libertarians answer that they should not – and that this commitment requires us to reject all positive duties. Liberal-egalitarians largely agree with the libertarian’s answer to the question, but deny the corollary they draw from it, arguing instead that egalitarian regimes do not require other-ownership. Drawing on (...) recent property theory I argue the libertarians are wrong that positive duties necessarily imply other-ownership, and the egalitarians are wrong that egalitarian entitlements largely avoid other-ownership. Instead, a prohibition on other-ownership guides us towards a middling political position, both allowing and constraining our positive duties and liabilities to others. I conclude by suggesting that a prohibition on other-ownership creates an attractive boundary condition for property in general. (shrink)

There is an argument for functionalism—and _ipso facto_ against identity theory—that can be sketched as follows: We are, or want to be, or should be dedicated to functional explanations in the sciences, or at least the special sciences. Therefore—according to the principle that what exists is what our ideal theories say exists—we are, or want to be, or should be committed to metaphysical functionalism. Let us call this the _argument from functional_ _explanation_. I will try to reveal the (...) motivation for making such an argument, and sketch the kind of response that should be made by critics of functionalism. (shrink)

The possibility of human reproductive cloning has led some bioethicists to suggest that potentiality-based arguments for fetal moral status become untenable, as such arguments would be committed to making the implausible claim that any adult somatic cell is itself a potential person. In this article I defend potentiality-based arguments for fetal moral status against such a reductio. Starling from the widely-held claim that the maintenance of numerical identity throughout successive changes places constraints on what a given entity can plausibly (...) be said to have the potential to become, I argue that the cell reprogramming that takes place in reproductive cloning is such that it produces a new individual, and so adult somatic cells cannot be potential persons. (shrink)

This dissertation alleges to successfully defend the argument from evil and thereby show that belief in an omnipotent, omniscient and omnibenevolent god is implausible. The three basic premises of the argument juxtapose the perfect attributes of the traditional Western notion of god to the existence of evil in an attempt to lead to the conclusion that god lacks one or more of the aforementioned attributes. Though some argue that the conclusion is not necessitated by the premises since (...) there is no logical inconsistency in asserting both that god possesses these attributes and that evil exists, it is argued here that a suppressed premise needs to be made explicit for the argument to function properly such that evil can be taken as evidence against the existence of a perfect deity. ;The theist proposes a variety of solutions to the apparent discord engendered by the coexistence of evil and a perfect deity. J. L. Mackie, in criticizing these various theistic proposals, claims that they all are either adequate or fallacious. Adequate solutions are comprised, essentially, of a denial of one of the three original premises of the argument, i.e., that either omnipotence, omniscience, omnibenevolence or evil is not real. The fallacious solutions, of which there are four types generally thought to be exhaustive, are shown to be inadequate for salvaging the traditional Western concept of deity. Familiar themes discussed among the fallacious solutions are: that the world is better with some evil than without; evil is necessary as a contrast to good; evil is necessary to bring about a greater good; evil is necessary for soul-making; evil is the result of free-will. ;Finally, a solution proposed by Clement Dore which does not properly fit into Mackie's schema, the "pollution" solution, so nicknamed because evil is viewed as a waste by-product of the natural functioning of causal laws upon the matter of the universe, is discussed. Four possible interpretations of this solution are offered and each interpretation, in turn, is found to be invalid. In conclusion, evil is shown to be powerful evidence against the existence of an omnipotent, omniscient and omnibenevolent god. (shrink)

Ronald Dworkin argues that disagreement in hard cases is ‘theoretical’ rather than empirical and of central importance to our understanding of law, showing ‘plain fact’ theories such as H. L. A. Hart’s sophisticated legal positivism to be false. The argument from theoretical disagreement targets positivism’s commitment to idea that the criteria a norm must meet to be valid in a given jurisdiction are constituted by a practice of convergent behavior by legal officials. The ATD suggests that in (...) hard cases there is no such pattern of convergent behavior. Positivists are divided over the force of the ATD. Much of this disagreement over the force of the ATD can be understood as disagreement over just what it is that legal officials disagreeing ‘theoretically’ are disagreeing about. Once the scope of empirical and theoretical disagreements are more accurately plotted, we will see that the actual disagreements that occur in hard cases are not ones which threaten a deeper and pervasive pattern of convergent behavior, one which focuses not upon rules specifying criteria of legal validity, but instead upon broad processes for making, interpreting, and applying law. Such an account remains positivist, relying on the social fact that there is such a consensus, but allows for considerable disagreement among legal officials deciding cases within such procedures. (shrink)

A core commitment of Bob Hale and Crispin Wright’s neologicism is their invocation of Frege’s Constraint—roughly, the requirement that the core empirical applications for a class of numbers be “built directly into” their formal characterization. According to these neologicists, if legitimate, Frege’s Constraint adjudicates in favor of their preferred foundation—Hume’s Principle—and against alternatives, such as the Dedekind–Peano axioms. In this paper, we consider a recent argument for legitimating Frege’s Constraint due to Hale, according to which the primary empirical (...) application of the naturals is transitive counting, or answering ‘how many’-questions using numerals. We make two claims regarding Hale’s argument. First, it fails to legitimate Frege’s Constraint in virtue of resting on unsupported and highly contentious assumptions. Secondly, even if sound, Hale’s argument would vindicate a version of Frege’s Constraint which fails to adjudicate in favor of Hume’s Principle over alternative characterizations of the naturals. (shrink)

This project tackles the problem of analyzing a specific form of reasoning called ‘sunk costs’ in economics and ‘argument from waste’ in argumentation theory. The project is to build a normative structure representing the form of the argument, and then to apply this normative structure to actual cases in which the sunk costs argument has been used. The method is partly structural and partly empirical. The empirical part is carried out through the analysis of case studies (...) of the sunk costs argument found in business decision-making, as well as other areas like medical decision-making and everyday conversational argumentation. The structural part is carried out by using existing methods and techniques from argumentation theory, like argumentation schemes. The project has three especially significant findings. First, the sunk costs argument is not always fallacious, and in many cases it can be seen to be a rational precommitment strategy. Second, a formal model of argumentation, called practical reasoning, can be constructed that helps a rational critic to judge which sunk costs arguments are fallacious and which are not. Third, this formal model represents an alternative model of rationality to the cost-benefit model based on Bayesian calculation of probabilities. This alternative model is called the argumentation model, and it is based on interpersonal reasoning in dialogue as the model of rational thinking. This model in turn is based on the underlying notion of commitment in dialogue. (shrink)

Current debate over the motives, ideological justifications, and outcomes of the war with Iraq have been strident and polarizing. _A Matter of Principle _is the first volume gathering critical voices from around the world to offer an alternative perspective on the prevailing pro-war and anti-war positions. The contribu-tors—political figures, public intellectuals, scholars, church leaders, and activists—represent the most powerful views of liberal internationalism. Offering alternative positions that challenge the status quo of both the left and the right, these essays (...) claim that, in spite of the inconsistent justifications provided by the United States and its allies and the conflict-ridden process of social reconstruction, the war in Iraq has been morally justifiable on the grounds that Saddam Hussein was a brutal tyrant, a flagrant violator of human rights, a force of global instability and terror, and a threat to world peace. The authors discuss the limitations of the current system of global governance, which tolerates gross violations of human rights and which has failed to prevent genocide in places such as Bosnia and Rwanda. They also underscore the need for reform in international institutions and international law. At the same time, these essays do not necessarily attempt to apologize for the mistakes, errors, and deceptions in the way the Bush administration has handled the war. Disputing the idea that the only true liberal position on the war is to be against it, this volume charts an invaluable third course, a path determined by a strong liberal commitment to human rights, solidarity with the oppressed, and a firm stand against fascism, totalitarianism, and tyranny. (shrink)

In his ’Logic and Theism’ Sobel claims that the allocation of prior probabilities to theories is a purely subjective matter. I claim that there are objective criteria for determining prior probabilities of theories (dependent on their simplicity and scope); and if there were not, science would be a totally irrational activity. I reject Sobel’s main criticism of my own cumulative argument for the existence of God that I argue illegitimately from each datum raising the probability of theism to (...) the conjunction of all data raising that probability, since I explicitly adopted a procedure which does not commit that fallacy. (shrink)

The antirealist argument from the underdetermination of theories by data relies on the premise that the empirical content of a theory is the only determinant of its belief-worthiness (premise NN). Several authors have claimed that the antirealist cannot endorse NN, on pain of internal inconsistency. I concede this point. Nevertheless, this refutation of the underdetermination argument fails because there are weaker substitutes for NN that will serve just as well as a premise to the argument. On (...) the other hand, antirealists have not made a convincing casefor NN (or its weaker substitutes) either. In particular, I criticize van Fraassen's recent claim that all ampliative rules in epistemology must be rejected on the grounds that they lead to incoherence. The status of the underdetermination argument remains unsettled. (shrink)

This world contains horrendous evils. It is also partly populated by realistic, purpose‐driven optimists. In this chapter, I mount an ad hominem argument that it is unreasonable for people to strike the latter life posture apart from belief in God. I review nontheistic alternatives – life postures that qualify realism, dampen hopes, curtail on meaning‐making, or aim at getting beyond personality altogether. I conclude that my argument should have force with those who are robustly realistic, robustly optimistic, (...) and firmly committed to finding value in personal life. (shrink)

In a recent paper, Dennis Plaisted examines an important argument that Leibniz gives for the existence of primitive concepts. After sketching a natural reading of this argument, Plaisted observes that the argument appears to imply something clearly inconsistent with Leibniz’s other views. To save Leibniz from contradiction, Plaisted offers a revision. However, his account faces a number of serious difficulties and therefore does not successfully eliminate the inconsistency. We explain these difficulties and defend a more (...) plausible alternative. In the process, we call attention to the neglected topic of Leibniz’s views on the nature of conceiving, and reveal his commitment to the somewhat surprising thesis that one can conceive something through a concept even if one has no conscious grasp of that concept. (shrink)