It is easy to say that the analysis by Kendler and Schaffner of the status of the dopamine hypothesis of schizophrenia (DHS) is, at the very least, a scholarly read. It includes an exhaustive review of the DHS literature accompanied by a demanding critique. The authors' bar for hypothesis verification is high, and their conclusion is negative—that scientific support is insufficient to retain the hypothesis as such. They proceed to evaluate the reasons they see for both (1) the extensive testing (...) of the hypothesis extending over decades and (2) the failure of the field to falsify in a timely fashion. In a very interesting section, they review philosophical positions about how and in what context scientific advances .. (shrink)
We develop a multi-agent deontic action logic to study the logical behaviour of two types of deontic conditionals: (1) conditional obligations, having the form "If group H were to perform action aH, then, in group F's interest, group G ought to perform action aG" and (2) conditional permissions, having the form "If group H were to perform action aH, then, in group F's interest, group G may perform action aG". First, we define a formal language for multi-agent deontic action logic (...) and a class of consequentialist models to interpret the formulas of the language. Second, we define a transformation that converts any strategic game into a consequentialist model. Third, we show that an outcome a* is a Nash equilibrium of a strategic game if and only if a conjunction of certain conditional permissions is true in the consequentialist model that results from the transformation of that strategic game. (shrink)
Two groups of agents, G1 and G2, face a *moral conflict* if G1 has a moral obligation and G2 has a moral obligation, such that these obligations cannot both be fulfilled. We study moral conflicts using a multi-agent deontic logic devised to represent reasoning about sentences like "In the interest of group F of agents, group G of agents ought to see to it that phi". We provide a formal language and a consequentialist semantics. An illustration of our semantics with (...) an analysis of the Prisoner’s Dilemma follows. Next, necessary and sufficient conditions are given for (1) the possibility that a single group of agents faces a moral conflict, for (2) the possibility that two groups of agents face a moral conflict within a single moral code, and for (3) the possibility that two groups of agents face a moral conflict. (shrink)
Every truth-functional three-valued propositional logic can be conservatively translated into the modal logic S5. We prove this claim constructively in two steps. First, we define a Translation Manual that converts any propositional formula of any three-valued logic into a modal formula. Second, we show that for every S5-model there is an equivalent three-valued valuation and vice versa. In general, our Translation Manual gives rise to translations that are exponentially longer than their originals. This fact raises the question whether there are (...) three-valued logics for which there is a shorter translation into S5. The answer is affirmative: we present an elegant linear translation of the Logic of Paradox and of Strong Three-valued Logic into S5. (shrink)
This paper is concerned with a natural deduction system for First Degree Entailment (FDE). First, we exhibit a brief history of FDE and of combined systems whose underlying idea is used in developing the natural deduction system. Then, after presenting the language and a semantics of FDE, we develop a natural deduction system for FDE. We then prove soundness and completeness of the system with respect to the semantics. The system neatly represents the four-valued semantics for FDE.
Taking our inspiration from modal correspondence theory, we present the idea of correspondence analysis for many-valued logics. As a benchmark case, we study truth-functional extensions of the Logic of Paradox (LP). First, we characterize each of the possible truth table entries for unary and binary operators that could be added to LP by an inference scheme. Second, we define a class of natural deduction systems on the basis of these characterizing inference schemes and a natural deduction system for LP. Third, (...) we show that each of the resulting natural deduction systems is sound and complete with respect to its particular semantics. (shrink)
In the 1930s, Carnap set out to incorporate psychology into the unity of science, by showing that all cognitively meaningful sentences of psychology can be translated into the language of physics. I will argue that Carnap, relying on his notion of protocol languages, defends a physicalistic philosophy of psychology that shows due appreciation to 'introspection' as a strictly subjective, but reliable way to verify sentences about one’s own mind. Second, I will point out that Carnap’s philosophy of psychology not only (...) takes into account overt behaviour, but must comprise neurophysiological processes as well. Last, I will show that Carnap aims to develop a philosophy of psychology that does justice to the ongoing changeability of scientific knowledge. (shrink)
Investigations into inter-level relations in computer science, biology and psychology call for an *empirical* turn in the philosophy of mind. Rather than concentrate on *a priori* discussions of inter-level relations between 'completed' sciences, a case is made for the actual study of the way inter-level relations grow out of the developing sciences. Thus, philosophical inquiries will be made more relevant to the sciences, and, more importantly, philosophical accounts of inter-level relations will be testable by confronting them with what really happens (...) in science. Hence, close observation of the ever-changing reduction relations in the developing sciences, and revision of philosophical positions based on these empirical observations, may, in the long run, be more conducive to an adequate understanding of inter-level relations than a traditional *a priori* approach. (shrink)
Quine's holistic empiricist account of scientific inquiry can be characterized by three constitutive principles: *noncontradiction*, *universal revisability* and *pragmatic ordering*. We show that these constitutive principles cannot be regarded as statements within a holistic empiricist's scientific theory of the world. This claim is a corollary of our refutation of Katz's [1998, 2002] argument that holistic empiricism suffers from what he calls the Revisability Paradox. According to Katz, Quine's empiricism is incoherent because its constitutive principles cannot themselves be rationally revised. Using (...) Gärdenfors and Makinson's logic of belief revision based on epistemic entrenchment, we argue that Katz wrongly assumes that the constitutive principles are *statements* within a holistic empiricist's theory of the world. Instead, we show that constitutive principles are best seen as *properties* of a holistic empiricist's theory of scientific inquiry and we submit that, without Katz's mistaken assumption, the paradox cannot be formulated. We argue that our perspective on the status of constitutive principles is perfectly in line with Quinean orthodoxy. In conclusion, we compare our findings with van Fraassen's  argument that we should think of empiricism as a stance, rather than as a doctrine. (shrink)
The branch of philosophical logic which has become known as “belief change” has, in the course of its development, become alienated from its epistemological origins. However, as formal criteria do not suffice to defend a principled choice between competing systems for belief change, we do need to take their epistemological embedding into account. Here, on the basis of a detailed examination of Isaac Levi's epistemology, we argue for a new direction of belief change research and propose to construct systems for (...) belief change that can do without, but do not rule out, selection functions, in order to enable an *empirical* assessment of the relative merits of competing belief change systems. (shrink)
We present a theory that copes with the dynamics of inconsistent information. A method is set forth to represent possibly inconsistent information by a finite state. Next, finite operations for expansion and contraction of finite states are given. No extra-logical element — a choice function or an ordering over (sets of) sentences — is presupposed in the definition of contraction. Moreover, expansion and contraction are each other's duals. AGM-style characterizations of these operations follow.
Two groups of agents, G₁ and G₂, face a moral conflict if G₁ has a moral obligation and G₂ has a moral obligation, such that these obligations cannot both be fulfilled. We study moral conflicts using a multi-agent deontic logic devised to represent reasoning about sentences like 'In the interest of group F of agents, group G of agents ought to see to it that ø'. We provide a formal language and a consequentialist semantics. An illustration of our semantics with (...) an analysis of the Prisoner's Dilemma follows. Next, necessary and sufficient conditions are given for (1) the possibility that a single group of agents faces a moral conflict, for (2) the possibility that two groups of agents face a moral conflict within a single moral code, and for (3) the possibility that two groups of agents face a moral conflict. (shrink)
In the 1930s, several members of the Vienna Circle set out to incorporate psychologyin the unity of science, by showing that all cognitively significant sentences of psychology can be translated into the language of physics. This epistemological analysis of psychology has become known as logical behaviourism. Carnap was the first logical empiricist to expound this programme in considerable detail. Relying on his particular notion of protocol languages, Carnap develops a view on the philosophy of psychology that not only is thoroughly (...) physicalistic, but also shows due appreciation to 'introspection' as a purely subjective, but reliable way to verify sentences about one's own mind. Second, contrary to the received view on logical behaviourism, Carnap's philosophy of psychology not only takes into account overt behaviour, but micro-physiological processes aswell. Last, Carnap's physicalistic philosophy of mind couples full awareness of the changeability of scientific knowledge with the aspiration to develop a philosophy of psychology that really does justice to this changeability. (shrink)
This paper presents two systems of natural deduction for the rejection of non-tautologies of classical propositional logic. The first system is sound and complete with respect to the body of all non-tautologies, the second system is sound and complete with respect to the body of all contradictions. The second system is a subsystem of the first. Starting with Jan Łukasiewicz's work, we describe the historical development of theories of rejection for classical propositional logic. Subsequently, we present the two systems of (...) natural deduction and prove them to be sound and complete. We conclude with a ‘Theorem of Inversion’. (shrink)
I am going to begin today by bringing together one of the themes of Carol Voeller’s remarks with one of the criticisms raised by Rachel Cohon, because I see them as related, and want to address them together. Voeller argues that the moral law is constitutive of our nature as rational agents. To put it in her own words, “to be the kind of object it is, is for a thing to be under, or constituted by, the laws which (...) are its nature. For Kant, laws are constitutive principles … in something very close to an Aristotelian sense: for Kant, laws are proper to objects1 much as form is to object, for Aristotle.” Voeller believes that the moral law defines the kind of cause that we are, and we are under the moral law because we are that kind of cause. Since the defining quality of a rational agent is that a rational agent acts on its representation - I prefer to say conception - of a law, Voeller thinks the question for Kant is whether we can find a law which just is the law for causes that act on their representations of laws. As she puts it, “The problem, for Kant, is whether there is a law of a cause that acts on norms - on reflection, on its representation of a law. If there is, then the constitutive principle of that cause will be the law normative for it in reflection.” Now Voeller appears to think that I will disagree with this strategy for grounding the moral law, because she sees me as giving an anti-metaphysical or ametaphysical account of Kant’s ethics, in contrast to Kant’s own. But so far, I don’t.. (shrink)
Third wave anti-essentialist critique has too often been used to dismiss second wave feminist projects. I examine claims that Carol Gilligan's work is "essentialist," and argue that her recent research requires this criticism be rethought. Anti-essentialist feminist method should consist in attention to the relations of power that construct accounts of gendered identity in the course of different forms of empirical enquiry, not in rejecting any general claim about women or girls.
There are many things in this book that I like. I like Gould's basic philosophical framework--her "social ontology" of human beings conceived of as individuals-in-relation-- which was developed in her earlier works, Marx's Social Ontology and Rethinking Democracy. I like her use of a feminist "ethic of care" throughout, even to ground human rights. This latter move is surprising in light of Carol Gilligan's provocative (and in my view insightful) contrast between an ethic of rights (characteristic of conventional male (...) moral reasoning in our culture) and an ethic of care (more characteristic of the moral deliberation of women).1 But if human rights are conceived of as positive claims on others--as Gould argues, convincingly, they should be--then these claims have force only if we care for others and can related to them empathetically. I like the diversity of topics this book addresses: racism and democracy, cultural identity and group rights, women's human rights, the global "democratic deficit,” implications for democracy of the internet, and more. Rather than sketch an overview of the book, or comment superficially on its many significant issues, I will concentrate here on just two essays. (shrink)
This article argues that Carol Gilligan's research in moral development psychology, work which claims that women speak about ethics in a "different voice" than men do, is applicable to business ethics. This essay claims that Gilligan's "ethic of care" provides a plausible explanation for the results of two studies that found men and women handling ethical dilemmas in business differently. This paper also speculates briefly about the management implications of Gilligan's ideas.
This book arose out of a conference organised by the Fay Gale Centre for Research on Gender at The University of Adelaide honouring Carol Bacchi's work and is intended to make that work accessible to a range of audiences. - from the ...
Gilligan's understanding of moral reasoning as a kind of perception has its roots in the conception of moral experience espoused by Simone Weil and Iris Murdoch. A clear understanding of that conception, however, reveals grave difficulties with Gilligan's descriptions of the care perspective and justice perspective. In particular, we can see that the two perspectives are not mutually exclusive once we recognize that attention does not require attachment and that impartiality does not require detachment.
Conflicting religious experiences in different traditions do not necessarily <span class='Hi'>defeat</span> the rationality of conflicting beliefs sustained by those experiences in those traditions. The circularity that protects religious beliefs from such mutual <span class='Hi'>defeat</span> is not vicious. Moreover, the lack of ‘epistemological humility’ exhibited by such believers poses no threat to world peace. In fact, a campaign for compulsory humility would itself constitute a much greater threat.
McBride offers a succinct summary of Gould’s book and ponders what the significance of theoretical discussions of the nature of human rights and degrees of democracy might be for our time when the U.S. government has descended into “barbarism” and made a sham out of anything resembling democracy. He concludes that Gould’s book is “first rate” as “a learned exercise in dreaming,” granting against his own deep pessimism that one can never know for sure that “dreams” may not turn out (...) to have some practical relevance. [Abstract prepared by the Editors.]. (shrink)