Statements not only update our current knowledge, but also have other dynamic effects. In particular, suggestions or commands ?upgrade' our preferences by changing the current order among worlds. We present a complete logic of knowledge update plus preference upgrade that works with dynamic-epistemic-style reduction axioms. This system can model changing obligations, conflicting commands, or ?regret'. We then show how to derive reduction axioms from arbitrary definable relation changes. This style of analysis also has a product update version with (...) preferences between actions, as well as worlds. Some illustrations are presented involving defaults and obligations. We conclude that our dynamic framework is viable, while admitting a further extension to more numerical ?utility update'. (shrink)

The article studies preferences of agents in a setting with imperfect information. For such a setting, the authors propose a new class of preferences. It is said that an agent prefers one statement over another if, among all indistinguishable worlds, the agent prefers the worlds where the first statement is true to those where the second one is true. The main technical result is a sound and complete logical system describing the interplay between a binary modality capturing preferences and the (...) knowledge modality. The proof of completeness is using a newly proposed “tumbled pairs” technique. (shrink)

Preference is a key area where analytic philosophy meets philosophical logic. I start with two related issues: reasons for preference, and changes in preference, first mentioned in von Wright’s book The Logic of Preference but not thoroughly explored there. I show how these two issues can be handled together in one dynamic logical framework, working with structured two-level models, and I investigate the resulting dynamics of reason-based preference in some detail. Next, I study (...) the foundational issue of entanglement between preference and beliefs, and relate the resulting richer logics to belief revision theory and decision theory. (shrink)

An explication of preference and equivalence with regard to the evaluation of states of affairs. The logical system developed consists of the ordinary propositional calculus together with connectives standing for the notions above. In the course of this study a number of useful distinctions and definitions can be found. The author indicates that his logic of preference may be of use in connection with utility and decision theory, but does not develop this point.--R. H. T.

If an agent prefers one kind of agents to the other agents, then the agent has first-order preferences. If the agent prefers agents with one kind of preferences to the other agents, then the agent has second-order preferences. The article proposes a sound, complete, and decidable logical system capable of expressing higher-order preferences.

We contrast Bonanno’s ‘Belief Revision in a Temporal Framework’ [15] with preference change and belief revision from the perspective of dynamic epistemic logic (DEL). For that, we extend the logic of communication and change of [11] with relational substitutions [8] for preference change, and show that this does not alter its properties. Next we move to a more constrained context where belief and knowledge can be defined from preferences [29; 14; 5; 7], prove completeness of a (...) very expressive logic of belief revision, and define a mechanism for updating belief revision models using a combination of action priority update [7] and preference substitution [8]. (shrink)

In the last few years, preference logic and in particular, the dynamic logic of preference change, has suddenly become a live topic in my Amsterdam and Stanford environments. At the request of the editors, this article explains how this interest came about, and what is happening. I mainly present a story around some recent dissertations and supporting papers, which are found in the references. There is no pretense at complete coverage of preference logic (for (...) that, see Hanson 2001) or even of preference change (Hanson 1995). (shrink)

How may we best understand the motivational structure that stands behind individuals' acts of voting? In “The Impartial Spectator Goes to Washington” we suggested that expressive concerns swamp narrowly consequential motivations, in contradistinction to normal market transactions in which the priority is reversed. A striking consequence of this fact is that individuals will be led to vote for outcomes that they would reject were they in a position to act decisively. In this regard we found the moral psychology Adam Smith (...) develops in The Theory of Moral Sentiments remarkably fecund in suggesting alternatives to what we call the standard theory of electoral behavior. (shrink)

In ‘Semantic Foundations for the Logic of Preference’ (Rescher, ed.,The Logic of Decision and Action, University Press, Pittsburgh, 1967), Nicholas Rescher claims that, on the semantics developed in that paper, a certain principle - call it ‘Q’ turns out to be ‘unacceptable’. I argue, however, that, given certain assumptions that Rescher invokes in that same paper,Q can in fact be shown to be a ‘preference-tautology’, and henceQ should be classified as ‘acceptable’ on Rescher's theory.

This paper is a critique of Kenneth Arrow's thesis concerning the logical impossibility of a constitution. I argue that one of the premises of Arrow's proof, that of the transitivity of indifference, is untenable. Several concepts of preference are introduced and counter-instances are offered to the transitivity of indifference defined along the standard lines in terms of these concepts. Alternate analyses of indifference in terms of preference are considered, and it is shown that these do not serve Arrow's (...) purposes either. Finally, it is argued that in the single special case in which indifference could plausibly be held to be transitive, Arrow's thesis is innocuous. (shrink)

A possible world semantics for preference is developed. The remainder operator () is used to give precision to the notion that two states of the world are as similar as possible, given a specified difference between them. A general structure is introduced for preference relations between states of affairs, and three types of such preference relations are defined. It is argued that one of them, actual preference, corresponds closely to the concept of preference in informal (...) discourse. Its logical properties are studied and shown to be plausible. (shrink)

We investigate in intuitionistic first-order logic various principles of preference relations alternative to the standard ones based on the transitivity and completeness of weak preference. In particular, we suggest two ways in which completeness can be formulated while remaining faithful to the spirit of constructive reasoning, and we prove that the cotransitivity of the strict preference relation is a valid intuitionistic alternative to the transitivity of weak preference. Along the way, we also show that the (...) acyclicity axiom is not finitely axiomatizable in first-order logic. (shrink)

With his Logic of Incarnation, James K. A. Smith has provided a compelling critique of the universalizing tendencies in some strands of postmodern philosophy of religion. A truly postmodern account of religion must take seriously the preference for particularity first evidenced in the Christian account of the incarnation of God. Moving beyond the urge to universalize, which characterizes modern thought, Smith argues that it is only by taking seriously particular differences--historical, religious, and doctrinal--that we can be authentically religious (...) and authentically postmodern. Smith remains hugely influential in both academic discourse and church movements. This book is the first organized attempt to bring both of these aspects of Smith's work into conversation with each other and with him. With articles from an internationally respected group of philosophers, theologians, pastors, and laypeople, the entire range of Smith's considerable influence is represented here. Discussing questions of embodiment, eschatology, inter-religious dialogue, dogma, and difference, this book opens all the most relevant issues in postmodern religious life to a unique and penetrating critique. (shrink)

The four main essays in this volume investigate new sectors of the theory of decision, preference, act-characteristics, and action analysis. Herbert A. Simon applies tools developed in the theory of decision-making to the logic of action, and thereby develops a novel concept of heuristic power. Adapting ideas from utility and decision theory, Nicholas Rescher proposes a logic of preference by which conflicting theories proposed by G. H. von Wright, R. M. Chisholm, and others can be systematized. (...) Donald Davidson discusses difficulties in specifying the structure of action sentences to elucidate how their meaning depends on that structure. G. H. von Wright devises a method for describing each “state of the world” that results from an action, in a revision of his own earlier work. Additionally, a study of the logic of norms by Alan Ross Anderson is presented as an appendix, along with an appendix by Rescher outlining the aspects of action. (shrink)

An individual is said to have a taste for a particular menu, i.e. a subset of available commodities, if he is indifferent between all commodity bundles that contain the same quantity for each commodity which actually is in the menu, whatever the rest of the bundle. Then, a taste is directly defined as a deep property of preferences. As a first result, it is shown that a complete and transitive preference relation over the commodity bundles is equivalent to regular (...) tastes where regularity means that tastes can be derived from a pure qualitative relation between the different commodities. Besides, a preference family based on preference relations corresponding to each particular commodity is said to be rationalizable if there exists a metapreference over commodity bundles which consistently summarizes the preference family and then allows to decide. As a second result, it is shown that if a preference family is rationalizable, then the tastes are organized thanks to a reflexive and transitive qualitative relation between the different commodities. (shrink)

There are two important aspects of any democratic decision: aggregation of preferences and deliberation about preferences. They are essential and complementary components of any decision making process. While the well-studied process of aggregation focuses on accumulating individual preferences without discussing their origin [4], deliberation can be seen as a conversation through which individuals justify their preferences, a process that might lead to changes in their opinions as they get influenced by one another. Till now, there has been a lot of (...) work on the ‘aggregation’ aspect (e.g., [12, 14, 6]). However, some recent work has focussed on the deliberation aspect as well [8, 9, 10, 15]. Sometimes, deliberation does not lead to unanimity in preferences, but the discussion can lead to some ‘preference uniformity’ (see how deliberation can help in bypassing social choice theory’s impossibility results in [5]), which might facilitate their eventual aggregation. In addition, the combination of both processes provides a more realistic model for decision making scenarios. In light of this status quo, our focus is on the formal study of achieving such preference uniformities, e.g., single-peaked, single-caved, single-crossing, value-restricted, best-restricted, worst-restricted, medium-restricted, or group-separable profiles. In this short abstract we provide our preliminary ideas towards achieving singlepeakedness of preference profiles via deliberation. In what follows, we define two preference upgrade operators based on [8, 9] and provide a preliminary discussion on how single-peaked preference profiles can be achieved through such operations. We will delve into the details of the logical language in the main paper. (shrink)

The body of this book contains four original papers, comments, and author's replies, from a conference on the Logic of Decision and Action held at the University of Pittsburgh in March 1966. The principal authors are Herbert Simon, N. Rescher, Donald Davidson, and G. H. von Wright. Commentators are R. Ackermann, A. R. Anderson, N. D. Belnap, R. Binkley, H. N. Castañeda, R. Chisholm, J. Robison, and the late E. J. Lemmon. As appendices, there are articles by A. R. (...) Anderson "The Formal Analysis of Normative Systems," and Rescher's very brief scheme for the classifications of "actions" according to five key generic elements. Problems of decision and action are important for all philosophical critique of norms; in ethics, philosophy of science, of the social sciences, and so forth. The task of a comprehensive logic of action is to describe or prescribe the rules that govern reasoning about the occasions for action, the discovery of action alternatives, and the choice of action. In "The Logic of Heuristic Decision Making," Herbert Simon continues to support the view presented in his earlier work, that "ordinary mathematical reasoning, hence the ordinary logic of declarative statements, is all that is required," as relevant imperatives can be brought into normative systems via correspondence rules for conversion of existential statements. In "Semantic Foundations for the Logic of Preference," Rescher starts from the familiar semantical notion of a "possible world," offering the valuation-measure for such worlds as a determinant of preferabilities, and hoping to show that divergent approaches to problems of preference may be reconciled in this way. Davidson's article, "The Logical Form of Action Sentences" analyzes concepts of agency and intentionality. G. H. von Wright sees a logic of change to be necessary in order to formulate a logic of action. His essay elaborates some of the ideas in his book Norms and Action, but also gives essential modifications of his earlier views.--M. B. M. (shrink)

We present several classes of logics for reasoning with information stored in information systems. The logics enable us to cope with the phenomena of incompleteness of information and uncertainty of knowledge derived from such an information. Relational inference systems for these logics are developed in the style of dual tableaux.

Arif Ahmed has recently argued that causal decision theory is dynamically inconsistent and that we should therefore prefer evidential decision theory. However, the principal formulation of the evidential theory, Richard Jeffrey’s Logic of Decision, has a mixed record of its own when it comes to evaluating plans consistently across time. This note probes that neglected record, establishing the dynamic consistency of evidential decision theory within a restricted class of problems but then illustrating how evidentialists can fall into sequential incoherence (...) outside of this class. Uncovering the evidentialist’s own dynamic inconsistencies reveals, contra Ahmed, that sequential choice considerations do not significantly favor the evidentialist’s theory over the causalist’s. (shrink)

As Classical Propositional Logic finds its algebraic counterpart in Boolean algebras, the logic of Quantum Mechanics, as outlined within G. Birkhoff and J. von Neumann’s approach to Quantum Theory (Birkhoff and von Neumann in Ann Math 37:823–843, 1936) [see also (Husimi in I Proc Phys-Math Soc Japan 19:766–789, 1937)] finds its algebraic alter ego in orthomodular lattices. However, this logic does not incorporate time dimension although it is apparent that the propositions occurring in the logic of (...) Quantum Mechanics are depending on time. The aim of the present paper is to show that tense operators can be introduced in every logic based on a complete lattice, in particular in the logic of quantum mechanics based on a complete orthomodular lattice. If the time set is given together with a preference relation, we introduce tense operators in a purely algebraic way. We derive several important properties of such operators, in particular we show that they form dynamic pairs and, altogether, a dynamic algebra. We investigate connections of these operators with logical connectives conjunction and implication derived from Sasaki projections in an orthomodular lattice. Then we solve the converse problem, namely to find for given time set and given tense operators a time preference relation in order that the resulting time frame induces the given operators. We show that the given operators can be obtained as restrictions of operators induced by a suitable extended time frame. (shrink)

Abstract.The author gives a short survey of the different methods which have been proposed to deal with the logic of norm sentences on the basis of logical systems of descriptive language: deontic logic, logic of norms as an isomorphism of propositional logic, restriction of logical relations to the propositional content of norm sentences, transformation of norms into sanction sentences, preference interpretation of norm sentences, double interpretation of ought‐sentences and the use of the descriptive interpretation as (...) a tool for establishing the logic of norms, proposition about norms in the place of normative logic, the logic of admissible worlds, postulates addressed to the rational lawgiver and technical ought as a substitute for nor‐mological considerations. A critical analysis of these attempts may prove them inappropriate, but it is not sufficient to prove the impossibility of any method of founding normative logic on systems of a descriptive language. Therefore the author adds a general consideration on the chances of such approaches. (shrink)

‘During the 1930’s and early 1940’s a thoughtful observer might well have tended towards the conclusion that logic would break off from the ancient moorings that kept it joined to philosophy, and either link itself to mathematics, or go its own way as an independent discipline’. Professor Rescher finds however, on the contrary, that the literature of the last ten to fifteen years displays a significant cluster of developments in logic that may be called philosophical. Branches of logical (...) theory have been developed with philosophical applications in mind. Foundations have been laid for an exact logic of obligation, preference, choice, command; the traditional problem of universals has been focused from the perspective of mathematical logic; existence, time, tense, change and process is being explored with techniques of logic; literature on the logic of belief, hypothesis and probability is extensive. (shrink)

In this dissertation, I argue that vagueness is a metaphysical phenomenon---that properties and objects can be vague---and propose a trivalent theory of vagueness meant to account for the vagueness in the world. In the first half, I argue against the theories that preserve classical logic. These theories include epistemicism, contextualism, and semantic nihilism. My objections to these theories are independent of considerations of the possibility that vagueness is a metaphysical phenomenon. However, I also argue that these theories are not (...) capable of accommodating metaphysical vagueness. As I move into my positive theory, I first argue for the possibility of metaphysical vagueness and respond to objections that charge that the world cannot be vague. One of these objections is Gareth Evans' much-disputed argument that vague identities are impossible. I then describe what I call the logic of states of affairs. The logic of states of affairs has as its atomic elements states of affairs that can obtain, unobtain, or be indeterminate. Finally, I argue that the logic of states of affairs is a better choice for a theory of vagueness than other logics that could accommodate metaphysical vagueness such as supervaluationism and degree theories. Preference should be given to the logic of states of affairs because it provides a better explanation of higher-order vagueness and does a better job of matching our ordinary understandings of logical operators than supervaluationism does and because it provides a more general account of indeterminacy than the account given by degree theories. Advisor: Reina Hayaki. (shrink)

This paper revisits Richard Hare's classical and much discussed argument for preference utilitarianism, which relies on the conception of moral deliberation as a process of thought experimentation, with concomitant preference change. The paper focuses on an apparent gap in Hare's reasoning, the so-called No-Conflict Problem. A solution to this difficulty which was proposed in is re-examined and shown to lead to a number of difficulties. The paper therefore also considers an alternative idea, due to Daniel Elstein. This new (...) proposal may well turn out to be the best way of filling the gap in Hare's argument. The paper also examines whether the gap is there to begin with: The problem should perhaps be dissolved rather than solved. This suggestion goes back to an idea of Zeno Vendler. Unfortunately, it turns out that Vendler's move does not save Hare from criticism: It does dissolve the No-Conflict Problem, but at the same time it gives rise to another, potentially more serious difficulty. (shrink)

As Classical Propositional Logic finds its algebraic counterpart in Boolean algebras, the logic of Quantum Mechanics, as outlined within G. Birkhoff and J. von Neumann’s approach to Quantum Theory (Birkhoff and von Neumann in Ann Math 37:823–843, 1936) [see also (Husimi in I Proc Phys-Math Soc Japan 19:766–789, 1937)] finds its algebraic alter ego in orthomodular lattices. However, this logic does not incorporate time dimension although it is apparent that the propositions occurring in the logic of (...) Quantum Mechanics are depending on time. The aim of the present paper is to show that tense operators can be introduced in every logic based on a complete lattice, in particular in the logic of quantum mechanics based on a complete orthomodular lattice. If the time set is given together with a preference relation, we introduce tense operators in a purely algebraic way. We derive several important properties of such operators, in particular we show that they form dynamic pairs and, altogether, a dynamic algebra. We investigate connections of these operators with logical connectives conjunction and implication derived from Sasaki projections in an orthomodular lattice. Then we solve the converse problem, namely to find for given time set and given tense operators a time preference relation in order that the resulting time frame induces the given operators. We show that the given operators can be obtained as restrictions of operators induced by a suitable extended time frame. (shrink)

The four main essays in this volume investigate new sectors of the theory of decision, preference, act-characteristics, and action analysis. Herbert A. Simon applies tools developed in the theory of decision-making to the logic of action, and thereby develops a novel concept of heuristic power. Adapting ideas from utility and decision theory, Nicholas Rescher proposes a logic of preference by which conflicting theories proposed by G. H. von Wright, R. M. Chisholm, and others can be systematized. (...) Donald Davidson discusses difficulties in specifying the structure of action sentences to elucidate how their meaning depends on that structure. G. H. von Wright devises a method for describing each “state of the world” that results from an action, in a revision of his own earlier work. Additionally, a study of the logic of norms by Alan Ross Anderson is presented as an appendix, along with an appendix by Rescher outlining the aspects of action. (shrink)

We continue the work initiated in Herzig and Lorini (J Logic Lang Inform, in press) whose aim is to provide a minimalistic logical framework combining the expressiveness of dynamic logic in which actions are first-class citizens in the object language, with the expressiveness of logics of agency such as STIT and logics of group capabilities such as CL and ATL. We present a logic called ( Deterministic Dynamic logic of Agency ) which supports reasoning about actions (...) and joint actions of agents and coalitions, and agentive and coalitional capabilities. In it is supposed that, once all agents have selected a joint action, the effect of this joint action is deterministic. In order to assess we prove that it embeds Coalition Logic. We then extend with modal operators for agents’ preferences, and show that the resulting logic is sufficiently expressive to capture the game-theoretic concepts of best response and Nash equilibrium. (shrink)

A broad class of inductive logics that includes the probability calculus is defined by the conditions that the inductive strengths [A|B] are defined fully in terms of deductive relations in preferred partitions and that they are asymptotically stable. Inductive independence is shown to be generic for propositions in such logics; a notion of a scale-free inductive logic is identified; and a limit theorem is derived. If the presence of preferred partitions is not presumed, no inductive logic is definable. (...) This no-go result precludes many possible inductive logics, including versions of hypothetico-deductivism. (shrink)

James Bohman has succeeded in reinvigorating the old debate over explanation and understanding by situating it within contemporary discussions about sociological indeterminacy and complexity. I argue that Bohman's preference for a paradigm based on Habermas's theory of communicative action is justifiable given the explanatory deficiencies of ethnomethodological, rational choice, rule-based, and functionalist methodologies. Yet I do not share his belief that the paradigm is preferable to less formalized models of interpretation.

Desires matter. How are we to understand the intentionality of desire? According to the two classical views, desire is either a positive evaluation or a disposition to act: to desire a state is to positively evaluate it or to be disposed to act to realize it. This Ph.D. Dissertation examines these conceptions of desire and proposes a deontic alternative inspired by Meinong. On this view, desiring is representing a state of affairs as what ought to be or, if one prefers, (...) as what should be. Desire involves a deontic manner of representing: a norm of the ought-to-be type features in desire’s intentional mode, as opposed to content. The dissertation is structured in three parts. In order to defend this conception, I formulate three main desiderata for a promising theory of the intentionality of desire in the introduction (§0). The first concerns desire’s direction of fit, i.e. the intuition that the world should conform to our desires. The second concerns the death of desire principle, i.e. the intuition that one cannot desire what one represents as actual. The last pertains to desire’s role in psychological explanations, i.e. the intuition that desires can explain some mental states and be explained by other mental states. The first part examines the main conceptions of desire in light of these desiderata. I argue that the classical pictures of desire do not adequately meet our desiderata. The first chapter is devoted to the evaluative conception (§1), while the second examines the motivational approach (§2). Following these criticisms, I then present the deontic view of desire (§3). In the second part, I defend this conception with the help of three arguments. The main idea is that appealing to norms of the ought-to-be type can satisfy our chief desiderata: the world should conform to norms (world-to-mind direction of fit, §4), norms are grounded on values and in turn ground obligations (explanation, §5), and norms are about non-actual states of affairs (death of desire principle, §6). In the last part, I develop the deontic view to draw a cartography of the various types of desire. Some desires are correct, while others are inappropriate. This distinction is explained by the deontic conception, as it matches that between states of affairs that ought to obtain and states that should not obtain (§7). Two study cases are examined: caprice and the impermissibility of desire aggregation. Intuitively, hopes, wishes, or urges are types of desire. The next chapter presents a typology inspired by the deontic view and the type of norms there are (§8). The last chapter discusses the main objections to the deontic approach (§9). In conclusion, I show the relevance of the deontic view for several debates in philosophy of mind and ethics. Desires are crucial because they are the ‘eye’ of what should be. (shrink)

Say that two sentences are factually equivalent when they describe the same facts or situations, understood as worldly items, i.e. as bits of reality rather than as representations of reality. The notion of factual equivalence is certainly of central interest to philosophical semantics, but it plays a role in a much wider range of philosophical areas. What is the logic of factual equivalence? This paper attempts to give a partial answer to this question, by providing an answer the following, (...) more specific question: Given a standard propositional language with negation, conjunction and disjunction as primitive operators, which sentences of the language should be taken to be factually equivalent by virtue of their logical form? The system for factual equivalence advocated in this paper is a proper fragment of the first-degree system for the logic of analytic equivalence put forward in the late seventies by R. B. Angell. I provide the system with two semantics, both formulated in terms of the notion of a situation’s being fittingly described by a linguistic item. In the final part of the paper I argue, contra a view I defended in my “Grounding and Truth-Functions”, that the logic for factual equivalence I advocate here should be preferred to Angell’s logic if one wishes to follow the general conception of the relationships between factual equivalence and the notion of grounding put forward in the 2010 paper. (shrink)

In this paper, illocutionary acts of commanding will be differentiated from perlocutionary acts that affect preferences of addressees in a new dynamic logic which combines the preference upgrade introduced in DEUL (dynamic epistemic upgrade logic) by van Benthem and Liu with the deontic update introduced in ECL II (eliminative command logic II) by Yamada. The resulting logic will incorporate J. L. Austin’s distinction between illocutionary acts as acts having mere conventional effects and perlocutionary acts as (...) acts having real effects upon attitudes and actions of agents, and help us understand why saying so can make it so in explicit performative utterances. We will also discuss how acts of commanding give rise to so-called “deontic dilemmas” and how we can accommodate most deontic dilemmas without triggering so-called “deontic explosion”. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:BOOK REVIEWS 127 from Adam, and inheriting "real sins" with real "guilt." From his De libero arbitrio onward, Augustine sees that if Adam's is the sin of someone "other" than ourselves, then it is alienum to us, is simply not "our" sin, and we cannot be held "guilty" of it. On the other hand, he is willing to accept that God might fittingly decree that Adam's descendants "inherit" the (...) debt, obligation, weakness, sickness, or mortality (choose the Augustinian metaphor you prefer) that is appropriate punishment for the sin which Adam (personally) committed. But, at bottom, Rigby and Sage have the same difficulty: both assume that Augustine was a "creationist," when he was not. For he saw that creationism must necessarily view our individual souls as metaphysically "other" than Adam's, so that God could never judge us guilty of that "other's" sin. Rigby would have been wiser to combine and extend the insights he himself quotes from Huftier (59 n. 14), Bonner (78-79: omnes fuimus ille unus), TeSelle (86), Confessions 4.31 ("by our own act": nos inde ruimus), and Rondet (121 n. 6). Augustine thought that we sinned the original sin (nos inde ruimus) precisely because we were metaphysically identical with our father Adam: fuimus iUe unus. I submit that the very same theory, making our souls identical with Adam's, subtends both the Confessions and Augustine's anti-Pelagian writings. ROBERT J. O'CONNELL Fordham University Mark D. Johnston. The Spiritual Logic of Ramon LluU. New York: Oxford University Press, 1987. Pp. x + 336. $65.oo. In the last twenty-five years a considerable number of scholars have turned their attention to the sort of formal logic found in the writings of the Catalan polymath, Ramon Lull (d. x316). This attention has run parallel to the current interest in medieval logic and linguistic theory, although Lull was less concerned with the theory of the properties of terms than with formulating a realistic theory of the predicables and categories and a new theory of demonstration. In the work under review Mark Johnston provides us with a study of Lulrs logic which is systematic in character. His work represents a first attempt to go beyond the studies of individual points of doctrine and to situate the development of Lulrs logic within the context of the evolution of the Ars lulliana. The work is divided into two parts. The first part analyzes the early writings to the year 13o3, the second the later ones composed between 13o3 and 1316. Johnston takes the very early Compendium logicae Algazelis as his point of departure for the first part and the Logica nova of 13o3 as that for the second part. He describes Lull's thought following the sequence of the different tracts of the Aristotelian logic and relates its development to the biography of the Majorcan philosopher. Throughout his study Johnston emphasizes three special characteristics in Lull's approach: its popular nature, its extreme realism, and its moralizing intention. Lull's works were composed both in Latin and in Catalan and aimed at an audience quite different than that of the clerical universities of the Middle Ages. His approach as- 128 JOURNAL OF THE HISTORY OF PHILOSOPHY 28"1 JANUARY 199o sumed a natural ontology, realist and "essentialist," which was of Avicennian derivation. His argumentation presupposed the idea that individual beings are concrete realizations of abstract essences situated in a scala creaturarum which leads in degrees to the divinity. The idea of basing philosophical discourse on the hierarchical structure of creation appealed to Lull because in it he found something common to the Christian, Jewish, and Islamic traditions. This fact made his logic necessarily an extremely realist one, consciously opposed to the logic of the Scholastics. From the extreme realism of Lulrs logic to his moralizing intent, it is but a step. To explain the status of things as real, Lull formulated a tropological exegesis of creation by way of the scala creaturamtm. Johnston accordingly directs our attention to the importance of analogy in Lull's logic. The analogical character of Lulrs logic had indeed been emphasized by the brothers Carreras y Artau in their history of Spanish philosophy... (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Logic of the SiteAlain Badiou (bio)Translated by Steve Corcoran (bio) and Bruno Bosteels (bio)The Commune Is a Site 1. Ontology of the CommuneTake any world whatsoever. A multiple that is an object of this world—whose elements are indexed by the transcendental of this world—is a site, if it happens to count itself within the referential field of its own indexation. Or again: a site is a multiple that (...) happens to behave in the world with regard to itself as with regard to its elements, in such a way as to be the support of being of its own appearance.Even if the idea is still obscure, we can begin to see its content: a site is a singularity, because it convokes its being in the appearing of its own multiple composition. It makes itself, in the world, the being-there of its being. Among other consequences, the site gives itself an intensity of existence. A site is a being that happens to exist by itself.We will ask: can we give a more concrete idea of what a site is? Is there a site?Let us consider the world "Paris at the end of the Franco-Prussian War of 1870." We are in the month of March 1871. After a semblance of resistance, and shot through with fear of revolutionary and worker Paris, the interim government of bourgeois "Republicans" capitulates to Bismarck's Prussians. In order to consolidate this political "victory"—very comparable to Petain's reactionary revenge in 1940 (where preferring an arrangement with the external enemy to exposure to the internal enemy)—it has an assembly with a royalist majority hastily elected by a frightened rural world, an assembly that sits in Bordeaux.Led by Thiers, the government hopes to take advantage of the circumstances to annihilate the political capacity of the workers. But on the Parisian front, the proletariat is armed in the form of a National Guard, owing to its having been mobilized during the siege on Paris. In theory the Parisian proletariat has many hundreds of cannons at its disposition. The "military" organism of the Parisians is the Central Committee, at which assemble the delegates of the various battalions of the National Guard, battalions [End Page 141] that are in turn linked to the great working-class quartiers of Paris—Montmartre, Belleville, and so forth.Thus we have a divided world whose logical organization—what in philosophical jargon could be called its transcendental organisation—reconciles intensities of political existence according to two sets of antagonistic criteria. Concerning the representative, electoral, and legal dispositions, one cannot but observe the preeminence of the Assembly of traditionalist Rurals,1 Thiers's capitulard government, and the officers of the regular army, who, having been licked without much of a fight by the Prussian soldiers, dream of doing battle with the Parisian workers. That is where the power is, especially as it is the only power recognized by the occupier. On the side of resistance, political intervention, and French revolutionary history, there is the fecund disorder of Parisian worker organizations, which intermingles with the Central Committee of the twenty quartiers, the Federation of Syndicate Chambers, a few members of the International, local military committees. In truth, the historical consistency of this world, which had been separated and disbanded [délié] owing to the war, is held together only by the majority conviction that no kind of worker capability for government exists. For the vast majority of people, including often the workers themselves, the politicized workers of Paris are simply incomprehensible. These workers are the inexistent aspect [l'inexistant propre] of the term "political capacity" in the uncertain world of the spring of 1871. But for the bourgeoisie they are still too existent, at least physically. The government receives threats from the stock exchange of this sort: "You will never have financial operations if you do not get rid of these reprobates." First up then, an imperative task, and a seemingly easy one to carry out: disarm the workers and, in particular, recuperate the cannons spread throughout working-class Paris by the military committees of the National Guard. It is this initiative that will make... (shrink)

This collection of essays explores the philosophy of human knowledge from a multitude of perspectives, with a particular emphasis upon the justification component of the classical analysis of knowledge and with an excursion along the way to explore the role of knowledge in Texas Hold ‘Em poker. An important theme of the collection is the role of knowledge in religion, including a detailed argument for agnosticism. A number of the essays touch upon issues in philosophical logic, among them a (...) fascinating new counter-example to Modus Ponens. The collection is rounded out with essays on causality and the philosophy of mind. The author’s perspective on the philosophy of human knowledge is fresh and challenging, as evidenced by essays entitled “On Epistemic Preferability;” “On Being Unjustified;” “The Logic of ‘Unless’” and “Is ‘This sentence is true.’ True?” An interesting feature of The Logic of Philosophy: Pesky Essays is the inclusion of responses to several of its key essays, contributed by such prominent contemporary philosophers as Roderick Chisholm, Ted Sider and Tomas Kapitan. (shrink)

This article describes the important structural characteristics of a recently developed game-theoretic model of deterrence, summarizes the major deductions drown from it, and discusses its implications for both the theory of deterrence and the current strategic relationship of the superpowers. The model shows that a credible threat and a power advantage are neither necessary nor sufficient conditions for stable deterrence. It also suggests that, even under ideal conditions, deterrence is an intricate and fundamentally fragile relationship that rests, ultimately, upon the (...) preferences and perceptions of key decision-makers rather than upon the nature and composition of each side’s strategic arsenal. (shrink)

This paper revisits Richard Hare's classical and much discussed argument for preference utilitarianism, which relies on the conception of moral deliberation as a process of thought experimentation, with concomitant preference change. The paper focuses on an apparent gap in Hare's reasoning, the so-called No-Conflict Problem. A solution to this difficulty which was proposed in is re-examined and shown to lead to a number of difficulties. The paper therefore also considers an alternative idea, due to Daniel Elstein. This new (...) proposal may well turn out to be the best way of filling the gap in Hare's argument. The paper also examines whether the gap is there to begin with: The problem should perhaps be dissolved rather than solved. This suggestion goes back to an idea of Zeno Vendler. Unfortunately, it turns out that Vendler's move does not save Hare from criticism: It does dissolve the No-Conflict Problem, but at the same time it gives rise to another, potentially more serious difficulty. (shrink)