Logic isn’t special. Its theories are continuous with science; its method continuous with scientific method. Logic isn’t a priori, nor are its truths analytic truths. Logical theories are revisable, and if they are revised, they are revised on the same grounds as scientific theories. These are the tenets of anti-exceptionalism about logic. The position is most famously defended by Quine, but has more recent advocates in Maddy, Priest, Russell, and Williamson. Although these authors agree on many methodological issues about logic, (...) they disagree about which logic anti-exceptionalism supports. Williamson uses an anti-exceptionalist argument to defend classical logic, while Priest claims that his anti-exceptionalism supports nonclassical logic. This paper argues that the disagreement is due to a difference in how the parties understand logical theories. Once we reject Williamson’s deflationary account of logical theories, the argument for classical logic is undercut. Instead an alternative account of logical theories is offered, on which logical pluralism is a plausible supplement to anti-exceptionalism. (shrink)

Introduction to this special issue of The Australasian Journal of Logic.

The paper presents a revised view of quantum mechanics centered on the notion (“genuine fortuitousness”) that the click in a counter is a totally lawless event, which comes by itself. A crucial point is the distinction between events on the spacetime scene and the content of the symbolic algorism. A revised conception of matrix variables emerges, by which such a variable, as part of a whole, does not have a value, under any circumstance. This conception is at variance with that (...) of indeterminate variables. A matrix variable not having a value does not enter spacetime and is not a measurable quantity, but manifests itself by a click in a counter with the remarkable property of having an onset, a beginning, from which the click develops. The individual click with its immense complexity is unique and lawless, even beyond probability. The notion of probability only applies to clicks in low resolution, and the completeness of a probabilistic theory is thereby seen in a new perspective. The genuinely fortuitous click is not produced by the impact of a particle, nor caused by an event in the source prior to the click in the counter. Indeed, there are no particles on the spacetime scene. The theory is thereby liberated from notions, which go with particles having indeterminate variables, and which have given to quantum mechanics the image of an unfathomable theory. With no particle as intermediary, the connection between source and detector is non-local, as is the entire theory, which deals exclusively with distributions of clicks. The locality permeating quantum mechanics is a symbolic one. The wave function enters in the sole role of encoding the probability distributions of clicks. The quest to understand the occurrence of the click in terms of the evolution of the wave function loses its meaning. However, click distributions in low resolution can be analyzed in terms of the connection between click distributions for different sets of counters, as given by the wave function. With increasing resolution, the probabilities, and the wave function, gradually lose significance, whereby the onset remains beyond reach. Thus, the downward path from events on the spacetime scene does not extend beyond the onset. The notion that quantum mechanics deals with particles (or fields) is rooted in the historical evolution but appears unable to accomodate genuine fortuitousness. The latter concept is given its due place by fully accepting the abstract nature of the matrix variables. (shrink)

Anti-exceptionalism about logic is the Quinean view that logical theories have no special epistemological status, in particular, they are not self-evident or justified a priori. Instead, logical theories are continuous with scientific theories, and knowledge about logic is as hard-earned as knowledge of physics, economics, and chemistry. Once we reject apriorism about logic, however, we need an alternative account of how logical theories are justified and revised. A number of authors have recently argued that logical theories are justified by abductive (...) argument (e.g. Gillian Russell, Graham Priest, Timothy Williamson). This paper explores one crucial question about the abductive strategy: what counts as evidence for a logical theory? I develop three accounts of evidential confirmation that an anti-exceptionalist can accept: (1) intuitions about validity, (2) the Quine-Williamson account, and (3) indispensability arguments. I argue, against the received view, that none of the evidential sources support classical logic. (shrink)

Logical pluralism has been in vogue since JC Beall and Greg Restall 2006 articulated and defended a new pluralist thesis. Recent criticisms such as Priest 2006a and Field 2009 have suggested that there is a relationship between their type of logical pluralism and the meaning-variance thesis for logic. This is the claim, often associated with Quine 1970, that a change of logic entails a change of meaning. Here we explore the connection between logical pluralism and meaning-variance, both in general and (...) for Beall and Restall's theory specifically. We argue that contrary to what Beall and Restall claim, their type of pluralism is wedded to meaning-variance. We then develop an alternative form of logical pluralism that circumvents at least some forms of meaning-variance. (shrink)

Bitcoin is a peer-to-peer electronic payment system that operates as an independent currency. This paper is a philosophical investigation of the ontological constitution of Bitcoin. Using Slavoj Žižek’s ontological triad of the real, the symbolic and the imaginary, the paper distinguishes between three ideal typical theories of money: commodity theory, fiat theory, and credit theory. The constitution of Bitcoin is analysed by comparing the currency to each of these ideal types. It is argued that Bitcoin is commodity money without gold, (...) fiat money without a state, and credit money without debt. In conclusion, it is suggested that Bitcoin poses an ideological challenge to conventional forms of money in so far as it not only provokes sedimented beliefs about money but also exposes the forms of exploitation, risk and even violence inherent in the existing system of state authorized credit money. (shrink)

ABSTRACT What do we disagree about when we disagree about logic? On the face of it, classical and nonclassical logicians disagree about the laws of logic and the nature of logical properties. Yet, sometimes the parties are accused of talking past each other. The worry is that if the parties to the dispute do not mean the same thing with ‘if’, ‘or’, and ‘not’, they fail to have genuine disagreement about the laws in question. After the work of Quine, this (...) objection against genuine disagreement about logic has been called the meaning-variance thesis. We argue that the meaning-variance thesis can be endorsed without blocking genuine disagreement. In fact, even the type of revisionism and nonapriorism championed by Quine turns out to be compatible with meaning-variance. (shrink)

Nonclassical theories of truth have in common that they reject principles of classical logic to accommodate an unrestricted truth predicate. However, different nonclassical strategies give up different classical principles. The paper discusses one criterion we might use in theory choice when considering nonclassical rivals: the maxim of minimal mutilation.

In bilateral systems for classical logic, assertion and denial occur as primitive signs on formulas. Such systems lend themselves to an inferentialist story about how truth-conditional content of connectives can be determined by inference rules. In particular, for classical logic there is a bilateral proof system which has a property that Carnap in 1943 called categoricity. We show that categorical systems can be given for any finite many-valued logic using $n$-sided sequent calculus. These systems are understood as a further development (...) of bilateralism—call it multilateralism. The overarching idea is that multilateral proof systems can incorporate the logic of a variety of denial speech acts. So against Frege we say that denial is not the negation of assertion and, with Mark Twain, that denial is more than a river in Egypt. (shrink)

The paper is a contribution to current debates about conspiracy theories within philosophy and cultural studies. Wittgenstein’s understanding of language is invoked to analyse the epistemological effects of designating particular questions and explanations as a ‘conspiracy theory’. It is demonstrated how such a designation relegates these questions and explanations beyond the realm of meaningful discourse. In addition, Agamben’s concept of sovereignty is applied to explore the political effects of using the concept of conspiracy theory. The exceptional epistemological status assigned to (...) alleged conspiracy theories within our prevalent paradigms of knowledge and truth is compared to the exceptional legal status assigned to individuals accused of terrorism under the War on Terror. The paper concludes by discussing the relation between conspiracy theory and ‘the paranoid style’ in contemporary politics. (shrink)

Rational addiction theories illustrate how absurd choice theories in economics get taken seriously as possibly true explanations and tools for welfare analysis despite being poorly interpreted, empirically unfalsifiable, and based on wildly inaccurate assumptions selectively justified by ad-hoc stories. The lack of transparency introduced by poorly anchored mathematical models, the psychological persuasiveness of stories, and the way the profession neglects relevant issues are suggested as explanations for how what we perhaps should see as displays of technical skill and ingenuity are (...) allowed to blur the lines between science and games. (shrink)

ABSTRACTWhat do we disagree about when we disagree about logic? On the face of it, classical and nonclassical logicians disagree about the laws of logic and the nature of logical properties. Yet, s...

In some philosophical arguments an important role is played by the claim that certain situations differ from each other with respect to phenomenology. One class of such arguments are minimal pair arguments. These have been used to argue that there is cognitive phenomenology, that high-level properties are represented in perceptual experience, that understanding has phenomenology, and more. I argue that facts about our mental lives systematically block such arguments, reply to a range of objections, and apply my critique to some (...) examples from the literature. (shrink)

In this thesis I seek to advance our understanding of what intuitions are. I argue that intuitions are experiences of a certain kind. In particular, they are experiences with representational content, and with a certain phenomenal character. -/- In Chapter 1 I identify our target and provide some important reliminaries. Intuitions are mental states, but which ones? Giving examples helps: a person has an intuition when it seems to her that torturing the innocent is wrong, or that if something is (...) red it is coloured. We can also provide an initial characterisation of the state by saying that it has representational content, often causes belief, and appears to justify belief. In addition, there is something it is like to have an intuition: intuition has a certain phenomenal character. -/- Some argue that intuition does not explain anything which cannot be explained by other mental states. One version of this view takes intuition to reduce to belief. In Chapter 2 I argue that this entails that agents are rationally criticisable in situations where we know they are not, and that such views are therefore untenable. A parallel argument shows that the corresponding approach to perception fails. This suggests a similarity in nature: both intuition and perception are experiences. -/- Others take intuition to reduce to a disposition to have a belief. In Chapter 3 I consider a line of argument against such views, find it unsuccessful, and present two new arguments. One is likely to be dialectically ineffective. The other suffers no such weakness: it shows that the proposed reduction fails. As before, the argument also applies to perception, and suggests that intuition and perception are both experiences. -/- In the remainder of the thesis I develop an account of intuition as an experience. I distinguish between content-specific and attitude-specific phenomenology, and argue that intuition lacks the former (Chapter 4), but has the latter (Chapter 5). This allows us to say what intuition is: it is is an experience with representational content and with attitude-specific phenomenology of a certain kind. -/- In Chapter 6 I put this account of intuition to use. When a person has a perceptual or intuitional experience, I argue that simply having the experience is what makes the subject justified in believing what the experience represents. Moreover, what explains that intuition and perception can justify belief in this way is precisely their phenomenal character. (shrink)

Logic, Logical connectives, Verbal disputes, Proof theory, Non-classical logic.

"The nature of intuition and its relation to other mental faculties, particularly perception, is one of the most hotly contested debates in philosophy of mind and psychology. Do intuitions justify belief or merely dispositions to believe? Is intuition a mental state with distinctive phenomenal qualities and if so, how do these differ from normal perceptual states? Drawing on the most recent philosophical research on intuition and perception, Ole Koksvik defends the idea that intuition not only justifies belief but can play (...) a much wider role in our everyday epistemic lives than previously thought. Arguing that intuitional experience is similar to perceptual experience he develops a novel view of intuition as conscious experience. His argument involves both a close description of the kind of experience that intuition is and a defence of intuition against criticism from experimental philosophy. The picture that emerges defends intuitions not because they can be found to be true or false but because they permit us to consider the world as it is might otherwise be and are continuous with the rest of general human inquiry"--. (shrink)

The philosophical discussion about logical constants has only recently moved into the substructural era. While philosophers have spent a lot of time discussing the meaning of logical constants in the context of classical versus intuitionistic logic, very little has been said about the introduction of substruc-tural connectives. Linear logic, affine logic and other substructural logics offer a more fine-grained perspective on basic connectives such as conjunction and disjunction, a perspective which I believe will also shed light on debates in the (...) philosophy of logic. In what follows I will look at one particularly interesting instance of this: The development of the position known as logical inferentialism in view of substructural connectives. I claim that sensitivity to structural properties is an interesting challenge to logical inferentialism, and that it ultimately requires revision of core notions in the inferentialist litera-ture. Specifically, I want to argue that current definitions of proof theoretic harmony give rise to problematic nonconservativeness as a result of their insensitivity to substructurality. These nonconservativeness results are undesirable because they make it impossible to consistently add logical constants that are of independent philosophical interest. (shrink)

Prioritarianism is an ethical theory that gives extra weight to the well-being of the worse off. In contrast, dominant policy-evaluation methodologies, such as benefit-cost analysis, cost-effectiveness analysis, and utilitarianism, ignore or downplay issues of fair distribution. Based on a research group founded by the editors, this important book is the first to show how prioritarianism can be used to assess governmental policies and evaluate societal conditions. This book uses prioritarianism as a methodology to evaluate governmental policy across a variety of (...) policy domains: taxation, health policy, risk regulation, education, climate policy, and the COVID-19 pandemic. It is also the first to demonstrate how prioritarianism improves on GDP as an indicator of a society's progress over time. Edited by two senior figures in the field with contributions from some of the world's leading economists, this volume bridges the gap from the theory of prioritarianism to its practical application. (shrink)

The model-theoretic analysis of the concept of logical consequence has come under heavy criticism in the last couple of decades. The present work looks at an alternative approach to logical consequence where the notion of inference takes center stage. Formally, the model-theoretic framework is exchanged for a proof-theoretic framework. It is argued that contrary to the traditional view, proof-theoretic semantics is not revisionary, and should rather be seen as a formal semantics that can supplement model-theory. Specifically, there are formal resources (...) to provide a proof-theoretic semantics for both intuitionistic and classical logic. We develop a new perspective on proof-theoretic harmony for logical constants which incorporates elements from the substructural era of proof-theory. We show that there is a semantic lacuna in the traditional accounts of harmony. A new theory of how inference rules determine the semantic content of logical constants is developed. The theory weds proof-theoretic and model-theoretic semantics by showing how proof-theoretic rules can induce truth-conditional clauses in Boolean and many-valued settings. It is argued that such a new approach to how rules determine meaning will ultimately assist our understanding of the apriori nature of logic. (shrink)

Focusing on visual and textual representations of squatting and women's resistances against apartheid in the comic book series Crossroads, this article examines how graphic history may enable a more nuanced understanding of anarchic resistances in the postcolonial context. A six-part comic series created by historian Koni Benson in collaboration with political cartoonists the Trantraal Brothers and Ashley Marais, and published by Cape Town's Isotrope Comics, Crossroads tells the story of women's organized resistance to the apartheid state in the Crossroads township (...) on the outskirts of Cape Town. Based on oral testimony from more than sixty women, Crossroads incorporates original... (shrink)

When a person has an intuition, it seems to her that things are certain ways; to many it seems that torturing the innocent for fun is wrong, for example. When a person has an intuition, there is also something particular it is like to be her: intuitions have a characteristic phenomenal character. This article asks how the phenomenal character of intuition is related to two core core questions in the philosophy of intuition, namely: Is intuition a source of justification and (...) knowledge? and What are intuitions?. (shrink)

Contemporary capitalism is caught in a dual crisis of economy and ecology. Central to both dimensions of this crisis is the issue of growth. On the one hand, capitalist economies must exhibit perpetual growth in order to function properly. On the other hand, the expansion of capitalist production and consumption ultimately interferes with the processes of natural growth that we find within the domain of ecology. Parallax of Growth explores the ideas of economy and ecology and the factors that have (...) put them on a collision course. Among other things, the book aims to explain why our current mode of economic organization seems to be inherently committed to perpetual growth. A key answer, argues Bjerg, is that contemporary capitalism is characterized by an inherent ′debt drive′, whereby the creation of money through the issuance of commercial bank credit has locked our economy in a vicious circle of forced growth and increasing debt. Parallax of Growth is not a catalogue of solutions to the ecological or the economic crisis. The book aims to shift the inquiry from ‘what shall we do?’ to ‘why have we not already done it?’ In order to address the challenges of our contemporary times of crisis, it is not enough to point out all the different reasons why perpetual economic growth is impossible and unsustainable. We need to understand how the idea of growth is deeply ingrained in the ideology as well as the organization of our society. The book aims to open the space for philosophical thinking about this important issue. (shrink)

PART VII: PUBLICS AND MOVEMENTS. - PART VIII: GOVERNMENT RESPONSES. - PART IX: POLICY INSTRUMENTS. - PART X: PRODUCERS AND CONSUMERS. - PART XI: GLOBAL GOVERNANCE. - PART XII: RECONSTRUCTION.

This paper asks how anti-nuclear activists form collectives that are able to act collectively. It argues that shared interests and collective identities only insufficiently explain the emergence of collective action. Alternatively, the paper investigates meeting talk of German anti-nuclear groups where activists discuss proposals for collective action. Based on audio recordings, a sequential analysis of activists’ deliberations traces the transformation of vague ideas into concrete and collectively agreed to proposals. It is shown how the process by which activists reach a (...) common understanding about a particular protest activity—as something that is being talked about here and now—and the process of becoming an acting collectivity—a group that is ready to carry out this protest activity in the future—are interdependent. Activists make use of “indexicality” to introduce specifically vague proposals, enabling others to respond and contribute to the emerging proposal while group agency is suspended. At first, the authorship of proposals is minimized. Step by step, vague proposals are specified by meeting participants until a “change in footing” marks group consensus. While the group emerges as the author and principal of proposals through this process, the paper shows that implementation relies on individual principals again who take responsibility during and after the meeting. (shrink)

Our traditional ways of thinking about politics and society are becoming obsolete. We need some new points of reference in order to re-imagine the possible character, growth, and functioning of our private and common life. Such re-imagination would imply doing away with every-man-for-himself individualism as well as consumption-makes-me-happy materialism and the-state-will-take-care-of-it passivity. There is an alternative: Personalism is a forgotten, yet golden perspective on humanity that seeks to describe what a human being is and to then draw the social consequences. (...) Personalism builds upon the thinking of Martin Buber and Emmanuel Levinas, among others, and has been a source of inspiration for Martin Luther King, Desmond Tutu, and other important personalities in recent history. According to personalism, humans are relational and engaged and possess dignity. The person and the relationship amongst persons are the universal point of departure: Human beings have inherent dignity, and good relationships amongst humans are crucial for the good, engaged life and for a good society. Personalism has been greatly neglected in Western political thought. In this book, Jonas Norgaard Mortensen attempts to introduce personalism while simultaneously demonstrating its historical origins, acquainting the reader with its thinkers and those who have practiced it, and showing that personalism has a highly relevant contribution to make in the debate about today's social and political developments. (shrink)

This paper argues that, contrary to common opinion, intuition can result from conscious reasoning. It also discusses why this matters.

We argue that deliberative decision-making that is inclusive, transparent and accountable can contribute to more trustworthy and legitimate decisions on difficult ethical questions and political trade-offs during the pandemic and beyond.

While anti-exceptionalism about logic is now a popular topic within the philosophy of logic, there’s still a lack of clarity over what the proposal amounts to. currently, it is most common to conceive of AEL as the proposal that logic is continuous with the sciences. Yet, as we show here, this conception of AEL is unhelpful due to both its lack of precision, and its distortion of the current debates. Rather, AEL is better understood as the rejection of certain traditional (...) properties of logic. The picture that results is not of one singular position, but rather a cluster of often connected positions with distinct motivations, understood in terms of their rejection of clusters of the various traditional properties. In order to show the fruitfulness of this new conception of AEL, we distinguish between two prominent versions of the position, metaphysical and epistemological AEL, and show how the two positions need not stand or fall together. (shrink)

This article extends analyses of environmental influences on social action by examining the emotions experienced by Karuk Tribal members in the face of environmental decline. Using interviews, public testimonies, and survey data we make two claims, one specific, the other general. We find that, for Karuk people, the natural environment is part of the stage of social interactions and a central influence on emotional experiences, including individuals’ internalization of identity, social roles, and power structures, and their resistance to racism and (...) ongoing colonialism. We describe a unique approach to understanding the production of inequality through disruptions to relationships among nature, emotions, and society. Grief, anger, shame, and hopelessness associated with environmental decline serve as signal functions confirming structures of power. The moral battery of fear and hope underpins environmental activism and resistance. More generally, we expand this concern to argue that neglecting the natural world as a causal force for “generic” social processes has limited not only work on Native Americans, but also work sociology of emotions and theories of race and ethnicity, and has masked the theoretical significance of environmental justice. Taking seriously the experiences of Native people and the importance of the natural environment offers an opportunity to extend sociological analyses of power and to move sociology toward a more decolonized discipline. (shrink)

Much of what we need to plan for our survival is already known, but what we know, how we know, and who knows is divided up between disciplines. Thus much of the problem of ensuring our survival is a matter of learning across the disciplines. We identify four modes through which we bring disciplinary knowledge together: the unity of science, integrated assessment, heuristic models, and distributed learning networks. Although none of them are perfect, we can learn how to put our (...) knowledge together across the disciplines much better than we do. (shrink)

'Business Ethics and Organizational Values' operates on three levels - society, organization and values. First, the dynamics of modern society are analyzed. Secondly, organizations are viewed as autopoietic systems constantly engaged in value debates with their stakeholders. Thirdly, values are placed in a business context.

When Ian Hacking won the Holberg International Memorial Prize 2009 his candidature was said to strengthen the legitimacy of the prize after years of controversy. Ole Jacob Madsen, Johannes Servan and Simen Andersen Øyen have talked to Ian Hacking about current questions in the philosophy and history of science.

A common argument against prostitution states that selling sex is harmful because it involves selling something deeply personal and emotional. More and more of us, however, believe that sexual encounters need not be deeply personal and emotional in order to be acceptable—we believe in the acceptability of casual sex. In this paper I argue that if casual sex is acceptable, then we have few or no reasons to reject prostitution. I do so by first examining nine influential arguments to the (...) contrary. These arguments purport to pin down the alleged additional harm brought about by prostitution by appealing to various aspects of its practice, such as its psychology, physiology, economics and social meaning. For each argument I explain why it is unconvincing. I then weight the costs against the benefits of prostitution, and argue that, in sum, prostitution is no more harmful than a long line of occupations that we commonly accept without hesitation. (shrink)

Med afsæt i Niklas Luhmanns systemteori og med eksempler inden for videnskab, kunst, økonomi m.m. argumenterer forfatteren for at der i dag ikke findes et etisk regelsæt som kan fortælle os hvad vi skal gøre og ikke gøre.