Tractatus 4.024 inspired the dominant semantics of our time: truth-conditional semantics. Such semantics is focused on possible worlds: the content of p is the set of worlds where p is true. It has become increasingly clear that such an account is, at best, defective: we need an ‘independent factor in meaning, constrained but not determined by truth-conditions’ (Yablo 2014, p. 2), because sentences can be differently true at the same possible worlds. I suggest a missing comment which, had it been (...) included in the Tractatus, would have helped semantics get this right from the start. This is my 4.0241: ‘Knowing what is the case if a sentence is true is knowing its ways of being true’: knowing a sentence’s truth possibilities and what we now call its topic, or subject matter. I show that the famous ‘fundamental thought’ that ‘the “logical constants” do not represent’ (4.0312) can be understood in terms of ways-based views of meaning. Such views also help with puzzling claims like 5.122: ‘If p follows from q, the sense of “p” is contained in the that of “q”’, which are compatible with a conception of entailment combining truth-preservation with the preservation of topicality, or of ways of being true. (shrink)

Introduction and translation of “The Four Phases of Philosophy” by Franz Brentano.

I present a formal theory of the logic and aboutness of imagination. Aboutness is understood as the relation between meaningful items and what they concern, as per Yablo and Fine’s works on the notion. Imagination is understood as per Chalmers’ positive conceivability: the intentional state of a subject who conceives that p by imagining a situation—a configuration of objects and properties—verifying p. So far aboutness theory has been developed mainly for linguistic representation, but it is natural to extend it to (...) intentional states. The proposed framework combines a modal semantics with a mereology of contents: imagination operators are understood as variably strict quantifiers over worlds with a content-preservation constraint. (shrink)

We give a review and critique of jury theorems from a social-epistemology perspective, covering Condorcet’s (1785) classic theorem and several later refinements and departures. We assess the plausibility of the conclusions and premises featuring in jury theorems and evaluate the potential of such theorems to serve as formal arguments for the ‘wisdom of crowds’. In particular, we argue (i) that there is a fundamental tension between voters’ independence and voters’ competence, hence between the two premises of most jury theorems; (ii) (...) that the (asymptotic) conclusion that ‘huge groups are infallible’, reached by many jury theorems, is an artifact of unjustified premises; and (iii) that the (nonasymptotic) conclusion that ‘larger groups are more reliable’, also reached by many jury theorems, is not an artifact and should be regarded as the more adequate formal rendition of the ‘wisdom of crowds’. (shrink)

Unification was originally introduced in automated deduction and term rewriting, but has recently also found applications in other fields. In this article, we give a survey of the results on unification obtained in two closely related, yet different, application areas of unification: description logics and modal logics.

Faced with the ongoing tragedy of poverty, ethicists call for effective measures of global justice to set up just institutional structures. Their arguments for a transnational obligation to help however remain contested, one of the main reasons for that being the lack of motivational support for trans-national visions of global justice. This articles suggests that the debate will gain new and helpful insights if it studies the motivational mechanisms at work in the dominant religious and cultural traditions, asking: How do (...) these particular traditions conceive of social justice; how do they motivate their adherents to extend solidarity? And how can the similarities surfacing in their motivational strategies be informative for the quest to devise a motivationally saturated account of global justice? The article demonstrates the potential of such an concrete-universal discourse in an exemplary manner by staging a dialogue between public Christian Social Ethics and African Ubuntu Ethics. (shrink)

Democratic decision-making is often defended on grounds of the ‘wisdom of crowds’: decisions are more likely to be correct if they are based on many independent opinions, so a typical argument in social epistemology. But what does it mean to have independent opinions? Opinions can be probabilistically dependent even if individuals form their opinion in causal isolation from each other. We distinguish four probabilistic notions of opinion independence. Which of them holds depends on how individuals are causally affected by environmental (...) factors such as commonly perceived evidence. In a general theorem, we identify causal conditions guaranteeing each kind of opinion independence. These results have implications for whether and how ‘wisdom of crowds’ arguments are possible, and how truth-conducive institutions can be designed. (shrink)

Faced with the ongoing tragedy of poverty in our world today, many have long called for a common standard of global justice. Such a standard should not be tied to any one particular strand of justice conceptualizations and it should yet be in harmony with the central motivating beliefs of the various concerned moral worldviews. The article reframes global justice thinking by approaching a core problem, namely motivating people to care for distant needy strangers, in a concrete intercultural manner: it (...) sets out to study and compare the motivational underpinnings for an expansion of social justice, in an exemplary fashion, within two long-standing worldview traditions, namely Christian social ethics and contemporary Confucian ethics, in order to gain a more realistic impression of what a commonly shared and motivationally backed notion of global justice may look like. While the former expresses a universal concern for the poor, the latter has recently attracted interest, since Southeast Asian countries managed to lift millions of people out of abject poverty. As both traditions consider loving communal relationships to constitute the foundation of all justice considerations, the article inquires how this quest shapes each tradition’s way to motivate their adherents’ compliance with a vision of global justice. (shrink)

The Description Logic Handbook covers all aspects of the research in the field of knowledge representation. Written by some of the most prominent researchers in the field, and covering the basic technical material and implementational aspects, it is both a unique reference and a self-study guide.

Unlike the first English translation in 1974, this edition contains the text corresponding to Brentano's original 1874 edition.

First published in 1969. Routledge is an imprint of Taylor & Francis, an informa company.

Condorcet's famous jury theorem reaches an optimistic conclusion on the correctness of majority decisions, based on two controversial premises about voters: they are competent and vote independently, in a technical sense. I carefully analyse these premises and show that: whether a premise is justi…ed depends on the notion of probability considered; none of the notions renders both premises simultaneously justi…ed. Under the perhaps most interesting notions, the independence assumption should be weakened.

We propose a new account of indicative conditionals, giving acceptability and logical closure conditions for them. We start from Adams’ Thesis: the claim that the acceptability of a simple indicative equals the corresponding conditional probability. The Thesis is widely endorsed, but arguably false and refuted by empirical research. To fix it, we submit, we need a relevance constraint: we accept a simple conditional 'If φ, then ψ' to the extent that (i) the conditional probability p(ψ|φ) is high, provided that (ii) (...) φ is relevant for ψ. How (i) should work is well-understood. It is (ii) that holds the key to improve our understanding of conditionals. Our account has (i) a probabilistic component, using Popper functions; (ii) a relevance component, given via an algebraic structure of topics or subject matters. We present a probabilistic logic for simple indicatives, and argue that its (in)validities are both theoretically desirable and in line with empirical results on how people reason with conditionals. (shrink)

Die Idee zu der in diesem Band dokumentierten Tagung ist im Rahmen des disziplinübergreifenden Nachwuchswissenschaftsnetzwerkes THESIS entstanden. Der Dialog über die fachlichen und disziplinären Grenzen hinweg hat bei THESIS seit dessen Gründung im Jahre 1990 stets einen großen Raum eingenommen. Anderen Fächern Respekt und Interesse entgegenzubringen und sich nicht von stereotypen Vorurteilen leiten zu lassen, ist konstitutiver Bestandteil im Selbstverständnis des Netzwerkes. Selbstverständlich gibt es in einem solchen Verbund eine Reihe von Gelegenheiten (darunter auch den einen oder anderen entwicklungsfördernden Konflikt), (...) das eigene Bild vom Anderen und das andere Bild vom Eigenen zur Sprache zu bringen und zu hinterfragen. Auf der Basis dieser bestehenden Kommunikationsstrukturen trafen sich am 11. Oktober 2003 in Göttingen 12 junge Wissenschaftlerinnen und Wissenschaftler zwischen, über und auch auf den Grenzen ihrer eigenen Herkunftsdisziplinen, um den Trendbegriff [alpha]Transdisziplinarität" auf seine Substanz zu prüfen. (shrink)

In dem Sammelband, der als Festschrift zum 65. Geburtstag von Franz Hundsnurscher erscheint, sind 47 Beiträge zu zwei thematischen Schwerpunkten versammelt, die im Werk Hundsnurschers von zentraler Bedeutung sind: Semantik und Dialoganalyse. Im ersten Teil werden neben grundlegenden Fragen der Semantik Aspekte der semantischen Beschreibung von Phraseologismen, des Fremdwortgebrauchs und des Grundwortschatzes diskutiert; neben synchronen (meist gebrauchstheoretischen) Untersuchungen zu Einzelwörtern und Quasisynonymengruppen im Deutschen stehen sprachhistorische und kontrastive Arbeiten. Vor allem mit theoretischen und methodologischen Fragen der Dialoganalyse, mit Fragen (...) der Analyse institutioneller Kommunikation (Politik, Recht, Wirtschaft) und literarischer Dialoge setzen sich die Beiträge des zweiten Teils auseinander. (shrink)

We present an abstract model of rationality that focuses on structural properties of attitudes. Rationality requires coherence between your attitudes, such as your beliefs, values, and intentions. We define three 'logical' conditions on attitudes: consistency, completeness, and closedness. They parallel the familiar logical conditions on beliefs, but contrast with standard rationality conditions like preference transitivity. We establish a formal correspondence between our logical conditions and standard rationality conditions. Addressing John Broome's programme 'rationality through reasoning', we formally characterize how you can (...) (not) become more logical by reasoning. Our analysis connects rationality with logic, and enables logical talk about multi-attitude psychology. (shrink)

In "Knowledge Triumphant," Franz Rosenthal observes that the Islamic civilization is one that is essentially characterized by knowledge ("'ilm"), for "ilm is ...

Agents are often assumed to have degrees of belief (“credences”) and also binary beliefs (“beliefs simpliciter”). How are these related to each other? A much-discussed answer asserts that it is rational to believe a proposition if and only if one has a high enough degree of belief in it. But this answer runs into the “lottery paradox”: the set of believed propositions may violate the key rationality conditions of consistency and deductive closure. In earlier work, we showed that this problem (...) generalizes: there exists no local function from degrees of belief to binary beliefs that satisfies some minimal conditions of rationality and non-triviality. “Locality” means that the binary belief in each proposition depends only on the degree of belief in that proposition, not on the degrees of belief in others. One might think that the impossibility can be avoided by dropping the assumption that binary beliefs are a function of degrees of belief. We prove that, even if we drop the “functionality” restriction, there still exists no local relation between degrees of belief and binary beliefs that satisfies some minimal conditions. Thus functionality is not the source of the impossibility; its source is the condition of locality. If there is any non-trivial relation between degrees of belief and binary beliefs at all, it must be a “holistic” one. We explore several concrete forms this “holistic” relation could take. (shrink)

Various theories try to give accounts of how measures of this confidence do or ought to behave, both as far as the internal mental consistency of the agent as ...

Im Zentrum der 1874 erschienenen bewußtseinspsychologischen Abhandlungen Brentanos steht die Beschreibung und Analyse des Psychischen. Damit bahnte sich jene Abwendung von der sensualistischen Tradition der philosophischen Bewußtseinslehre an, die in der Phänomenologie Edmund Husserls vollendet wurde.

When one thinks—knows, believes, imagines—that something is the case, one’s thought has a topic: it is about something, towards which one’s mind is directed. What is the logic of thought, so understood? This book begins to explore the idea that, to answer the question, we should take topics seriously. It proposes a hyperintensional account of the propositional contents of thought, arguing that these are individuated not only by the set of possible worlds at which they are true, but also by (...) their topic: what they are about. The book then builds epistemic, doxastic, probabilistic, and conditional logics based on this view. It applies them to issues ranging from dogmatism, scepticism, and epistemic fallibilism, to imagination and suppositional reasoning, belief revision, framing effects, and the acceptability of indicative conditionals. (shrink)

Timothy Williamson has defended the claim that the semantics of the indicative ‘if’ is given by the material conditional. Putative counterexamples can be handled by better understanding the role played in our assessment of indicatives by a fallible cognitive heuristic, called the Suppositional Procedure. Williamson’s Suppositional Conjecture has it that the Suppositional Procedure is humans’ primary way of prospectively assessing conditionals. This paper raises some doubts on the Suppositional Procedure and Conjecture.

We need to understand the impossible. Francesco Berto and Mark Jago start by considering what the concepts of meaning, information, knowledge, belief, fiction, conditionality, and counterfactual supposition have in common. They are all concepts which divide the world up more finely than logic does. Logically equivalent sentences may carry different meanings and information and may differ in how they're believed. Fictions can be inconsistent yet meaningful. We can suppose impossible things without collapsing into total incoherence. Yet for the leading philosophical (...) theories of meaning, these phenomena are an unfathomable mystery. To understand these concepts, we need a metaphysical, logical, and conceptual grasp of situations that could not possibly exist: Impossible Worlds. This book discusses the metaphysics of impossible worlds and applies the concept to a range of central topics and open issues in logic, semantics, and philosophy. It considers problems in the logic of knowledge, the meaning of alternative logics, models of imagination and mental simulation, the theory of information, truth in fiction, the meaning of conditional statements, and reasoning about the impossible. In all these cases, impossible worlds have an essential role to play. (shrink)

Description logics are a family of knowledge representation formalisms that are descended from semantic networks and frames via the system Kl-one. During the last decade, it has been shown that the important reasoning problems (like subsumption and satisfiability) in a great variety of description logics can be decided using tableau-like algorithms. This is not very surprising since description logics have turned out to be closely related to propositional modal logics and logics of programs (such as propositional dynamic logic), for which (...) tableau procedures have been quite successful.Nevertheless, due to different underlying institutions and applications, most description logics differ significantly from run-of-the-mill modal and program logics. Consequently, the research on tableau algorithms in description logics led to new techniques and results, which are, however, also of interest for modal logicians. In this article, we will focus on three features that play an important rôle in description logics (number restrictions, terminological axioms, and role constructors), and show how they can be taken into account by tableau algorithms. (shrink)

Armut ist immer noch die grosste Todesursache weltweit. Jahrlich sterben ca. 18 Mio. Menschen an ihren direkten und indirekten Folgen. Christliche Sozialethik will Armutsursachen aufdecken und dazu beitragen, dass diese durch die Etablierung von gerechten globalen Strukturen uberwunden werden. Globale Gerechtigkeit aber muss mehr sein als ein blosses Konstrukt westlicher Ethik. Sie muss als Ergebnis eines kulturubergreifenden Dialogs das bestimmen, was verschiedene Weltanschauungen konsensual als gerecht und zugleich realisierbar erachten. Die Arbeit untersucht in diesem Sinne christliche, afrikanische und konfuzianische Ethiktraditionen (...) auf ihr Verstandnis von Gerechtigkeit und Armut. Im Dialog mit der aktuellen philosophischen Diskussion erarbeitet sie konkrete Bausteine einer interkulturell erprobten Theorie globaler Gerechtigkeit. (shrink)

Designed to be used on its own or with its companion text, Ultimate Questions: Thinking About Philosophy 3e, this collection of readings covers the major topic areas in philosophy: Knowledge; Free Will; Personal Identity; Mind/Body; God; Ethics; and Political Philosophy. While focusing primarily on contemporary philosophy, it also includes many of the classic works essential to an introductory course.

This print textbook is available for students to rent for their classes. The Pearson print rental program provides students with affordable access to learning materials, so they come to class ready to succeed. For courses in Introductory Philosophy An active approach to philosophy While most introduction to philosophy courses focus on reading philosophical texts, Ultimate Questions: Thinking about Philosophy pushes students toward an active learning approach. The text is designed to instigate meaningful discussions between students and instructors, relying on more (...) than 100 "Food for Thought" exercises throughout. These exercises are based on the author's own experience engaging students in lecture environments and are designed to help students discover how well they understand philosophical concepts and how to apply them to real-life scenarios. The 4th Edition has been extensively updated with a new chapter, chapter expansions, and more. (shrink)

Behaviourism is the view that preferences, beliefs, and other mental states in social-scientific theories are nothing but constructs re-describing people's behaviour. Mentalism is the view that they capture real phenomena, on a par with the unobservables in science, such as electrons and electromagnetic fields. While behaviourism has gone out of fashion in psychology, it remains influential in economics, especially in ‘revealed preference’ theory. We defend mentalism in economics, construed as a positive science, and show that it fits best scientific practice. (...) We distinguish mentalism from, and reject, the radical neuroeconomic view that behaviour should be explained in terms of brain processes, as distinct from mental states. (shrink)

The first introductory textbook on description logics, relevant to computer science, knowledge representation and the semantic web.

Pets are truly great companions. Some individuals feel that owning a pet can help them prepare for a growing family by giving them a taste of what it would be like to have children. This study also looks into the psychological well-being and life experiences of LGBT fur parents. Employing the Interpretative Phenomenological Analysis, the findings of this study were: (1) With the presence of fur babies, participants had the ease to overcome stressful events, especially the ones that affect their (...) mental health. With these, they have the desire to take care of their fur babies under all circumstances because they see their fur babies as family members. Fur babies are excellent sources of motivation, confidence, and happiness for fur parents. They are treated as family members because they contribute to the mental and emotional aspects of fur parents. Moreover, the majority of respondents valued their pets far more than their actual family members, however, some didn't spend as much time with their relatives and friends. This study comes to the conclusion that a stronger bond with one's dog was also linked to higher anxiety about being unloved and rejected by family members and people surrounding us, which was linked to a heavier impact on one's psychological well-being. In reality, fur parents, especially LGBT parents, offer their fur babies a lot of love and attention compared to other things. (shrink)

Franz Clemens Brentano. -ZZW fo daß fich vielmehr der Gedanke einer Verwandtfchaft des Verfahrens hier und dort mit einer kaum abzuwehrenden Macht uns aufdrängt, Pafcal. der geniale Mathematiker und Phhfiker. thut in feinen *Penfees ...