This paper presents a calculus for mereotopological reasoning in which two-dimensional spatial regions are treated as primitive entities. A first order predicate language ℒ with a distinguished unary predicate c(x), function-symbols +, · and - and constants 0 and 1 is defined. An interpretation ℜ for ℒ is provided in which polygonal open subsets of the real plane serve as elements of the domain. Under this interpretation the predicate c(x) is read as 'region x is connected' and the function-symbols and (...) constants are given their meaning in terms of a Boolean algebra of polygons. We give an alternative interpretation ������ base on the real closed plane which turns out to be isomorphic to ℜ. A set of axioms and a rule of inference are introduced. We prove the soundness and completeness of the calculus with respect to the given interpretation. (shrink)

In recent years, there has been renewed interest in the development of formal languages for describing mereological (part-whole) and topological relationships between objects in space. Typically, the non-logical primitives of these languages are properties and relations such as `x is connected' or `x is a part of y', and the entities over which their variables range are, accordingly, not points, but regions: spatial entities other than regions are admitted, if at all, only as logical constructs of regions. This paper considers (...) two first-order mereotopological languages, and investigates their expressive power. It turns out that these languages, notwithstanding the simplicity of their primitives, are surprisingly expressive. In particular, it is shown that infinitary versions of these languages are adequate to express (in a sense made precise below) all topological relations over the domain of polygons in the closed plane. (shrink)

In recent years, there has been renewed interest in the development of formal languages for describing mereological (part-whole) and topological relationships between objects in space. Typically, the non-logical primitives of these languages are properties and relations such as ‘xis connected’ or ‘xis a part ofy’, and the entities over which their variables range are, accordingly, notpoints, butregions: spatial entities other than regions are admitted, if at all, only as logical constructs of regions. This paper considers two first-order mereotopological languages, and (...) investigates their expressive power. It turns out that these languages, notwithstanding the simplicity of their primitives, are surprisingly expressive. In particular, it is shown that infinitary versions of these languages are adequate to express (in a sense made precise below) all topological relations over the domain of polygons in the closed plane. (shrink)

A region-based model of physical space is one in which the primitive spatial entities are regions, rather than points, and in which the primitive spatial relations take regions, rather than points, as their relata. Historically, the most intensively investigated region-based models are those whose primitive relations are topological in character; and the study of the topology of physical space from a region-based perspective has come to be called mereotopology. This paper concentrates on a mereotopological formalism originally introduced by Whitehead, which (...) employs a single primitive binary relation C(x, y) (read: "x is in contact with y"). Thus, in this formalism, all topological facts supervene on facts about contact. Because of its potential application to theories of qualitative spatial reasoning, Whitehead's primitive has recently been the subject of scrutiny from within the Artificial Intelligence community. Various results regarding the mereotopology of the Euclidean plane have been obtained, settling such issues as expressive power, axiomatization and the existence of alternative models. The contribution of the present paper is to extend some of these results to the mereotopology of three-dimensional Euclidean space. Specifically, we show that, in a first-order setting where variables range over tame subsets of ℝ³, Whitehead's primitive is maximally expressive for topological relations; and we deduce a corollary constraining the possible region-based models of the space we inhabit. (shrink)

This paper seeks to examine the nature of matter from an Orthodox Christian patristic perspective, specifically that of St. Gregory of Nyssa, and compare this with David Bohm's concept of wholeness and the implicate order. By examining the ramifications of the doctrine of creation ex nihilo, the basic nature of matter as being rooted in the mind of God reveals itself, and furthermore shows that certain conceptions of quantum physics can provide language with which to give voice to this ancient (...) view. (shrink)

This paper addresses the ongoing debate over the relation between belief and credence. A proposal is made to reverse the currently predominant order of analysis, by taking belief as conceptually basic and credence as the phenomenon to be clarified. In brief, the proposal is to explicate an agent’s credence in a proposition P as the agent’s tendency toward believing P. Platitudinous as this reduction may seem, it runs counter to all of the major positions in the debate, including the Threshold (...) View, the Certainty View as conventionally understood, Dualism, Eliminativism, as well as Credence Primitivism. Section 1 gives an overview on the current state of the debate. Section 2 considers unsuccessful predecessors of the proposed belief-first approach to credence. Section 3 motivates and lays out the basics of a conceptual framework for thinking about doxastic states that characterizes such states in terms of two formally independent dimensions, one pertaining to the agent’s tendency toward believing P, the other to the level of resilience with which the agent manifests that tendency. Against this backdrop, it is argued in Sect. 4 that the present reduction satisfies a set of standard, theoretically neutral criteria of adequacy for theories of credence, at least once they are purged of a quite common conflation of tendency and resilience. Section 5 argues against all of the above competing accounts. (shrink)

This study illuminates how a cross-sector social partnership legitimizes itself toward multiple internal and external stakeholders. Within a single-case study design, we collected retrospective and real time data on the partnership between Deutsche Post DHL and The United Nations Office for the Coordination of Humanitarian Affairs. Within this partnership, Deutsche Post DHL provides corporate volunteers that support disaster response after natural disasters on a pro bono basis. The main objects that needed legitimacy as well as the audiences from which legitimacy (...) was mainly sought changed over time. In addition, we identified legitimation work as occurring across objects, audiences, and time. Thus, we introduce legitimation work as the purposeful effort of the legitimacy seeker to avoid certain issues while ensuring other issues that are of importance to the conferrer of legitimacy. These findings contribute to micro-level considerations within institutional theory which view legitimacy as socially constructed between legitimacy seeker and conferrer. Hence, we add another perspective on legitimation to the previously existing conceptualizations of legitimacy as a deterministic consequence of institutionalization. (shrink)

This paper discusses a scenario borrowed from Williamson (2000) and repurposes it to argue for the possibility of conflict between two prima facie categorical norms of epistemic rationality: the norm to respect one’s evidence and the norm to be coherent. It is argued, pace Williamson, that in the conflict defining the scenario, the evidence norm overrides the coherence norm; that a rational agent with our evidence would lack evidence about some of their own credences; and that for agents whose evidence (...) is limited in this way, incoherence fails to entail irrationality. The above possibility claim has also been defended by Worsnip (2018), albeit on a quite different premise set and in conjunction with a coherence-centered account of epistemic rationality that issues predictions incompatible with those licensed by the evidence-centered account recommended here, as illustrated towards the end of the paper. (shrink)

Consider where κ is an uncountable regular cardinal. By a result of Shelah's we have for almost all witnessing this. Here we consider the question if there could be a similar result for. We will discuss some basic facts implying that this cannot hold in general. We will use these facts to construct an interesting example of a pseudo Prikry forcing, answering a question of Sinapova.

In the past several years, observational entropy has been developed as both a quantum generalization of Boltzmann entropy, and as a rather general framework to encompass classical and quantum equilibrium and non-equilibrium coarse-grained entropy. In this paper we review the construction, interpretation, most important properties, and some applications of this framework. The treatment is self-contained and relatively pedagogical, aimed at a broad class of researchers.

Many have claimed that epistemic rationality sometimes requires us to have imprecise credal states (i.e. credal states representable only by sets of credence functions) rather than precise ones (i.e. credal states representable by single credence functions). Some writers have recently argued that this claim conflicts with accuracy-centered epistemology, i.e., the project of justifying epistemic norms by appealing solely to the overall accuracy of the doxastic states they recommend. But these arguments are far from decisive. In this essay, we prove some (...) new results, which show that there is little hope for reconciling the rationality of credal imprecision with accuracy-centered epistemology. (shrink)

The practice of early modern natural history depended on the collective collecting activities of a great variety of people. Among them, artisans played a major role in acquiring and distributing knowledge about the natural world and they contributed significantly to the scholarly labour in natural history. This distributed labour was both acknowledged by contemporaries as well as hidden from sight, reflecting the period′s dominant norms for class and gender. By combining an interpretation of the visual representation of labour in European (...) insect studies with an examination of written sources about natural history practices from about 1680 to 1810, this article decodes the often‐codified frontispieces and other more symbolic illustrations to offer new insights into the labour of natural history. Those who identified as scholars and artisans (or both) conceptualised their own intellectual and practical engagement with natural history within the semantic field of work. Some seemed to have even envisioned a new social role for academics as well as artisans. This article analyses the diversity of the “productive forces” in insect studies as they changed over time and it reconstructs what I will call the social imaginaries of participation. (shrink)

Student relativism is a widespread phenomenon in philosophy classes. While the exact nature of student relativism is controversially discussed, many authors agree on two points: First, it is widely agreed that SR is a rather problematic phenomenon, because it potentially undermines the very purpose of doing philosophy—if there is no objective truth, arguing seems to be pointless. Second, it is widely agreed that there will be some close connection between SR and a tolerant attitude towards conflicting opinions. In this paper, (...) I will argue that if these two assumptions are true, then discussing some basic philosophical insights about the concept of tolerance with students will be a promising new strategy of dealing with SR. (shrink)

The influence of Latin texts on Greek literature of the Imperial period remains somewhat understudied. However, there are some Greek texts that seem to depend from a Latin pretext, from works of Vergil in particular. This article discusses an epigram by Apollonides (Anth. Gr. 6.239), in which an old beekeeper named Kleiton is presented in much the same way as the old Corycian in Vergil’s “Georgics” (4.116-148). Vergil’s famous digression might therefore be a pretext for Apollonides’ poem. Moreover, Apollonides apparently (...) alludes to an epigram by Leonidas of Tarentum (Anth. Gr. 6.226) which features another old farmer named Kleiton. Apollonides’ poem could thus serve as an ‘appendix’ to Leonidas’ epigram based on the model of Vergil’s senex Corycius. (shrink)

We develop a theoretical model of network formation where actors are limitedly farsighted. In this way we extend current models with a new set of micro-foundations. Computer simulations are used to predict the stable network structures that are likely to emerge under the new assumptions. The co-author model by Jackson/wolinsky (1996) is used as an example. The co-author model formulates a tension between stability and efficiency when actors are myopic. Limitedly farsighted actors can overcome this tension but only if the (...) network is small enough. Thus, changing the micro-foundations of the network formation model leads to new implications at the macro-level in the sense that different networks are predicted to be stable than for existing micro-foundations. (shrink)

The efficient coding hypothesis posits that sensory systems are tuned to the regularities of their natural input. The statistics of natural image databases have been the topic of many studies, which have revealed biases in the distribution of orientations that are related to neural representations as well as behavior in psychophysical tasks. However, commonly used natural image databases contain images taken with a camera with a planar image sensor and limited field of view. Thus, these images do not incorporate the (...) physical properties of the visual system and its active use reflecting body and eye movements. Here, we investigate quantitatively, whether the active use of the visual system influences image statistics across the visual field by simulating visual behaviors in an avatar in a naturalistic virtual environment. Images with a field of view of 120° were generated during exploration of a virtual forest environment both for a human and cat avatar. The physical properties of the visual system were taken into account by projecting the images onto idealized retinas according to models of the eyes' geometrical optics. Crucially, different active gaze behaviors were simulated to obtain image ensembles that allow investigating the consequences of active visual behaviors on the statistics of the input to the visual system. In the central visual field, the statistics of the virtual images matched photographic images regarding their power spectra and a bias in edge orientations toward cardinal directions. At larger eccentricities, the cardinal bias was superimposed with a gradually increasing radial bias. The strength of this effect depends on the active visual behavior and the physical properties of the eye. There were also significant differences between the upper and lower visual field, which became stronger depending on how the environment was actively sampled. Taken together, the results show that quantitatively relating natural image statistics to neural representations and psychophysical behavior requires not only to take the structure of the environment into account, but also the physical properties of the visual system, and its active use in behavior. (shrink)

Satz, Seele und Sachverhalt. Der propositionale Wahrheitsbegriff im Spätmittelalter.

In dem vorliegenden Beitrag möchte ich an aktuelle argumentationsdidaktische Überlegungen anknüpfen und einen spezifischen Aspekt genauer untersuchen, der von der philosophiedidaktischen Forschung bisher ein Stück weit vernachlässigt worden ist. Dieser Aspekt betrifft die Vermittlung sogenannter argumentativer Metakompetenzen, worunter ich grob gesprochen Fähigkeiten des angemessenen Gebrauchs bzw. der verantwortungsvollen Regulation von argumentativen Kompetenzen verstehe. Die grundlegende Idee ist in diesem Zusammenhang, dass die Ausbildung basaler argumentativer Fähigkeiten zwar grundsätzlich durchaus wichtig und wünschenswert ist, dass aber gleichzeitig ein Einsatz dieser Fähigkeiten in (...) unterschiedlichen Situationen ganz unterschiedliche Funktionen erfüllt. Dementsprechend müssen Lernende nicht nur mit argumentativen Kompetenzen ausgestattet, sondern darüber hinaus auch zu einem reflektierten und situativ angemessenen Gebrauch dieser Kompetenzen befähigt werden. (shrink)

Dass das Verständnis von und die kritische Auseinandersetzung mit argumentativen Zusammenhängen für den Philosophie- und Ethikunterricht von besonderer Bedeutung ist, ist unumstritten. Ebenso unumstritten ist es, dass es sich bei der schulischen Vermittlung von Argumentationskompetenzen um keinen Selbstzweck handelt, sondern dass Lernende vor dem Hintergrund der erworbenen Fähigkeiten und Kenntnisse zu einer fundierten Meinungsbildung befähigt werden sollen. In diesem Artikel argumentiere ich vor dem Hintergrund neuerer Ergebnisse der erkenntnistheoretischen Forschung dafür, dass das soeben skizzierte Bild jedoch einer grundlegenden Ergänzung bedarf, (...) da im spezifischen Kontext des Philosophie- und Ethikunterrichts nicht die Bildung, sondern vielmehr die Aufgabe eines eigenen Urteils das epistemisch wünschenswerte Ergebnis darstellt. (shrink)

In eukaryotes, the messenger RNA (mRNA), the blueprint of a protein‐coding gene, is processed and packaged into a messenger ribonucleoprotein particle (mRNP) by mRNA‐binding proteins in the nucleus. The steps of mRNP formation – transcription, processing, packaging, and the orchestrated release of the export‐competent mRNP from the site of transcription for nuclear mRNA export – are tightly coupled to ensure a highly efficient and regulated process. The importance of highly accurate nuclear mRNP formation is illustrated by the fact that mutations (...) in components of this pathway lead to cellular inviability or to severe diseases in metazoans. We hypothesize that efficient mRNP formation is realized by a molecular mRNP packaging station, which is built by several recruitment platforms and coordinates the individual steps of mRNP formation. (shrink)

How should political leaders address the emerging climate crisis if citizens are reluctant to accept costly but necessary climate action? In this article, I address this question by harnessing insights from the realist tradition in political theory. I propose that the realist legitimacy framework provides action guidance by offering two broadly applicable heuristics for political agents: responsibility and responsiveness. These heuristics collide if citizens are unwilling to accept policies designed to secure a nation's long-term stability. Faced with this problem, some (...) authors make the supposedly realist argument that policymakers in liberal democracies should prioritise responsibility over responsiveness and embrace eco-authoritarianism to address the climate emergency. Against this line of argument, I maintain that the realist legitimacy framework entails no such commitment. Instead, realists must emphasise that responsible climate action entails a sufficient degree of responsiveness. I conclude by sketching how this insight may guide democratic leaders and climate activists in the future. (shrink)

In this paper, I argue that there are significant instances of educational injustice in the context of philosophy teaching that can be effectively reduced by an increased implementation of digital technologies. More specifically, I show that there are good reasons to believe that testimonial injustices constitute serious instances of educational injustice that will frequently occur in philosophy classes. Using digital tools to anonymize student contributions opens up a promising way of dealing with these injustices. If convincing, my arguments give reason (...) to perceive epistemic injustices in educational settings as a serious threat to educational justice and to reconsider the implications of increased digitalization for issues of educational justice. (shrink)

V tejto stati je najprv predstavená filozofia informácie (FI) a demarkácia jej predmetu v metodologicky ucelenej forme, to nadviazaním na koncepciu FI L. Floridiho. V porovnaní s jeho návrhom je vyčlenený i predmet metafilozofie informácie, a takisto je ujasnené aj označenie,,filozofie prima“. Floridi tvrdí, že jeho koncepcia FI ho môže voči iným filozickým disciplínam nadobudnúť. Problém chápania FI ako filozofie prima sa však ani po dvadsiatich rokoch od jeho uvedenia výraznejšej priamej reflexie nedočkal. V tejto štúdii je zodpovedaná otázka, či (...) je tento problém stále otvoreným problémom FI a ak áno, v akom zmysle. Je obhajovaná téza, že problém chápania FI ako filozofie primaje otvoreným problémom metafilozofie informácie, pričom vzhľadom na výsledky práce v FI sú identifikované niektoré oblasti, relatívne ku ktorým v súčasnosti môžeme, nemôžeme a nedokážeme FI označiť ako prima. (shrink)

V tejto stati je najprv predstavená filozofia informácie (FI) a demarkácia jej predmetu v metodologicky ucelenej forme, to nadviazaním na koncepciu FI L. Floridiho. V porovnaní s jeho návrhom je vyčlenený i predmet metafilozofie informácie, a takisto je ujasnené aj označenie,,filozofie prima“. Floridi tvrdí, že jeho koncepcia FI ho môže voči iným filozickým disciplínam nadobudnúť. Problém chápania FI ako filozofie prima sa však ani po dvadsiatich rokoch od jeho uvedenia výraznejšej priamej reflexie nedočkal. V tejto štúdii je zodpovedaná otázka, či (...) je tento problém stále otvoreným problémom FI a ak áno, v akom zmysle. Je obhajovaná téza, že problém chápania FI ako filozofie primaje otvoreným problémom metafilozofie informácie, pričom vzhľadom na výsledky práce v FI sú identifikované niektoré oblasti, relatívne ku ktorým v súčasnosti môžeme, nemôžeme a nedokážeme FI označiť ako prima. (shrink)

In this article, it will be argued that tolerance is not necessarily a political or ethical, but rather an abstract attitude that can be applied to many different dimensions of normative evaluation. More specifically, it will be argued that there are genuinely intellectual forms of tolerance that are epistemically motivated and that need to be assessed on purely epistemic grounds. To establish this claim, an abstract characterization of tolerance will be applied to the epistemic phenomenon of disagreement in order to (...) develop a specific conception of tolerance that picks out a genuinely intellectual attitude towards recognized disagreement. Since the attitude that is picked out by this conception is very popular and widespread, an epistemology of tolerance would be of great significance to our intellectual practice. (shrink)

In this article, it will be argued that tolerance is not necessarily a political or ethical, but rather an abstract attitude that can be applied to many different dimensions of normative evaluation. More specifically, it will be argued that there are genuinely intellectual forms of tolerance that are epistemically motivated and that need to be assessed on purely epistemic grounds. To establish this claim, an abstract characterization of tolerance will be applied to the epistemic phenomenon of disagreement in order to (...) develop a specific conception of tolerance that picks out a genuinely intellectual attitude towards recognized disagreement. Since the attitude that is picked out by this conception is very popular and widespread, an epistemology of tolerance would be of great significance to our intellectual practice. (shrink)

IntroductionResearch on the impact of cancer on close relationships brings up conflicting results. This systematic review collects empirical evidence on the research questions whether a cancer diagnosis in general or the type of cancer affects the divorce rate.Materials and MethodsThis systematic review was conducted according to the guidelines of the Cochrane Collaboration and the PRISMA statement. The following electronic databases were searched: Web of Science, Ovid SP MEDLINE, PsycINFO, PsyINDEX, CINAHL, ERIC. Risk of bias assessment was performed with the preliminary (...) risk of bias for exposures tool template. The grading of methodological quality was assessed with the Newcastle-Ottawa Scale.ResultsOf 13,929 identified records, 15 were included in the qualitative synthesis. In 263,616 cancer patients and 3.4 million healthy individuals, we found that cancer is associated with a slightly decreased divorce rate, except for cervical cancer, which seems to be associated with an increased divorce rate.DiscussionAccording to this systematic review, cancer is associated with a tendency to a slightly decreased divorce rate. However, most of the included studies have methodologic weaknesses and an increased risk of bias. Further studies are needed. (shrink)

Toleranz – eine Haltung, die in westlichen Gesellschaften wie kaum eine andere mit Nachdruck gefordert und mit Vehemenz verteidigt wird. Insbesondere eine tolerante Haltung gegenüber fremden Ansichten, Standpunkten und Überzeugungen wird von vielen als unverzichtbare Bedingung für das Gelingen eines demokratischen Miteinanders angesehen. Gleichzeitig wird kontrovers diskutiert, wo eigentlich die Grenzen einer toleranten Pluralität verschiedener Meinungen gezogen werden sollen. Welche Ansichten sind noch tolerabel, und welche nicht? Mit Blick auf aktuelle gesellschaftliche Diskurse und vor dem Hintergrund umfassender Kenntnisse der philosophischen (...) Toleranzforschung überprüft Dominik Balg kontrovers diskutierte Minderheitenpositionen auf ihre Tolerierbarkeit und entwickelt vor diesem Hintergrund einen klaren Kriterienkatalog, mit Hilfe dessen sich die Grenzen einer toleranten Haltung sinnvoll ziehen lassen. Darüber hinaus widmet er sich der Frage, was eigentlich jenseits unserer Toleranzgrenzen liegen sollte und wie man verantwortungsvoll mit Positionen umgehen kann, die nicht mehr tolerabel sind. (shrink)

This paper argues that true singular existentials are rationally indubitable. After the claim is clarified and motivated (Section 1), it is defended against objections inspired by Cartesian skepticism and semantic externalism (Section 2), a Fregean fine‐grained conception of propositional content (Section 3), Kripke's causal theory of reference (Section 4), a Stalnakerian coarse‐grained conception of propositional content (Section 5), as well as Evans's account of descriptive reference fixing (Section 6). The discussion is brought to a close by concluding that either true (...) singular existentials are a priori or apriority is not necessary for rational indubitability (Section 7). (shrink)

One of the important lessons to take away from Rohit Parikh’s impressive body of work is that logicians and computer scientists have much to gain by focusing their attention on the intricacies of political campaigns. Drawing on recent work developing a theory of expressive voting, we study the dynamics of voters’ opinions during an election. In this paper, we develop a model in which the relative importance of the different issues that concern a voter may change either in response to (...) candidates’ statements during a campaign or due to unforeseen events. We study how changes in a voter?s attention to the issues influence voting behavior under voting systems such as plurality rule and approval voting. We argue that it can be worthwhile for candidates to reshape public focus, but that doing so can be a complex and risky activity. (shrink)

The book develops a philosophical foundation to the field of management education using the work of Martin Heidegger as a guiding philosophy. It asks the questions ‘what is a corporation?’ and ‘what is corporate management?’ These two questions are foundational for management thought in general and management ethics in particular. Most other academic fields are in some way defined and guided by a philosophical discourse. This philosophical discourse is largely missing in the field of management thought and education. Without this (...) foundation it can never be clear what actually belongs into a certain academic discipline and what does not. It also therefore lacks a sound and well articulated ontological foundation critical for developing approaches to ethical management. This book seeks to fill this gap and consequently represents an interdisciplinary effort between the academic field of management/business administration and philosophy, which is vital for business ethics. Intended as required reading for an elective on philosophy of management that is offered annually at the Wits Business School / University of the Witwatersrand / Johannesburg. The structure of the course will be largely based on the structure of the book. (shrink)