The paper considers the set $\mathscr{M}\mathscr{L}_1$ of first-order polymodal formulas the modal operators in which can be applied to subformulas of at most one free variable. Using a mosaic technique, we prove a general satisfiability criterion for formulas in $\mathscr{M}\mathscr{L}_1$, which reduces the modal satisfiability to the classical one. The criterion is then used to single out a number of new, in a sense optimal, decidable fragments of various modal predicate logics.

This paper investigates partitions of lattices of modal logics based on superintuitionistic logics which are defined by forming, for each superintuitionistic logic L and classical modal logic , the set L[] of L-companions of . Here L[] consists of those modal logics whose non-modal fragments coincide with L and which axiomatize if the law of excluded middle p V p is added. Questions addressed are, for instance, whether there exist logics with the disjunction property in L[], whether L[] contains a (...) smallest element, and whether L[] contains lower covers of . Positive solutions as concerns the last question show that there are (uncountably many) superclean modal logics based on intuitionistic logic in the sense of Vakarelov [28]. Thus a number of problems stated in [28] are solved. As a technical tool the paper develops the splitting technique for lattices of modal logics based on superintuitionistic logics and ap plies duality theory from [34]. (shrink)

Ce chapitre reprend, en l’enrichissant, un article antérieur sur la philosophie de la biologie de l’empirisme logique, en en examinant les thèses centrales telles qu’elles sont exprimées lors des rencontres de Prague, de Paris et de Copenhague, rencontres décisives pour le développement du mouvement et son rayonnement dans le monde occidental. Je montre que l’empirisme logique n’a pas contribué au développement de la philosophie de la biologie, comme il l’a fait pour celui de la philosophie de la physique ou des (...) mathématiques. Les raisons de cet échec sont triples: 1o) les empiristes logiques n’avaient qu’une vague connaissance des sciences biologiques; 2o) ils se sont focalisés sur un cadre stérile, l’antivitalisme et le réductionisme, qu’ils prenaient pour la philosophie de la biologie; 3o) cela les a empêchés de traiter des véritables problèmes de la biologie. Entre les différentes sections de ce chapitre, j’insère des « intermezzos» qui replacent différents protagonistes de ces rencontres dans un contexte plus large. (shrink)

Reflections on the life and works of Scotus -- The early works of Scotus -- Duns Scotus at Oxford -- A Scotistic approach to the ultimate why-question -- God's knowledge : a study in Scotistic methodology -- William of Alnwick on Scotus and divine concurrence -- Scotus on the origin of possibility -- Scotus's lectures on the Immaculate Conception -- Scotus's ethics -- Scotus's eschatology : some reflections -- Scotism -- An Oxford dialogue on language and metaphysics -- Ockham and (...) the textbooks -- Ockham's conception of matter. (shrink)

In Working Virtue: Virtue Ethics and Contemporary Moral Problems, leading figures in the fields of virtue ethics and ethics come together to present the first ...

This book deals with Johann Heinrich Lamberts epistemological foundation of scientific knowledge and with his linear diagrams of logical reasoning.

We construct a normal extension of K4 with the finite model property whose minimal tense extension is not complete with respect to Kripke semantics.

PurposeThe aim of the research described was to identify reasons for differences between discourses on electronic voting in the UK and The Netherlands, from a qualitative point of view.Design/methodology/approachFrom both countries, eight e‐voting experts were interviewed on their expectations, risk estimations, cooperation and learning experiences. The design was based on the theory of strategic niche management. A qualitative analysis of the data was performed to refine the main variables and identify connections.FindingsThe results show that differences in these variables can partly (...) explain the variations in the embedding of e‐voting in the two countries, from a qualitative point of view. Key differences include the goals of introducing e‐voting, concerns in relation to verifiability and authenticity, the role of the Electoral Commissions and a focus on learning versus a focus on phased introduction.Research limitations/implicationsThe current study was limited to two countries. More empirical data can reveal other relevant subvariables, and contribute to a framework that can improve our understanding of the challenges of electronic voting.Originality/valueThis study shows the context‐dependent character of discussions on information security. It can be informative for actors involved in e‐voting in the UK and The Netherlands, and other countries using or considering electronic voting. (shrink)

In information security research, perceived security usually has a negative meaning, when it is used in contrast to actual security. From a phenomenological perspective, however, perceived security is all we have. This paper develops a phenomenological account of information security, in which a distinction is made between revealed and reveiled security instead. Linking these notions with the concepts of confidence and trust, the paper provides a phenomenological explanation of the electronic voting controversy in the Netherlands.

Conceiving new technologies as social experiments is a means to discuss responsible deployment of technologies that may have unknown and potentially harmful side-effects. Thus far, the uncertain outcomes addressed in the paradigm of new technologies as social experiments have been mostly safety-related, meaning that potential harm is caused by the design plus accidental events in the environment. In some domains, such as cyberspace, adversarial agents may be at least as important when it comes to undesirable effects of deployed technologies. In (...) such cases, conditions for responsible experimentation may need to be implemented differently, as attackers behave strategically rather than probabilistically. In this contribution, we outline how adversarial aspects are already taken into account in technology deployment in the field of cyber security, and what the paradigm of new technologies as social experiments can learn from this. In particular, we show the importance of adversarial roles in social experiments with new technologies. (shrink)

We propose a logic for reasoning about metric spaces with the induced topologies. It combines the 'qualitative' interior and closure operators with 'quantitative' operators 'somewhere in the sphere of radius r.' including or excluding the boundary. We supply the logic with both the intended metric space semantics and a natural relational semantics, and show that the latter (i) provides finite partial representations of (in general) infinite metric models and (ii) reduces the standard '∈-definitions' of closure and interior to simple constraints (...) on relations. These features of the relational semantics suggest a finite axiomatisation of the logic and provide means to prove its EXPTIME-completeness (even if the rational numerical parameters are coded in binary). An extension with metric variables satisfying linear rational (in)equalities is proved to be decidable as well. Our logic can be regarded as a 'well-behaved' common denominator of logical systems constructed in temporal, spatial, and similarity-based quantitative and qualitative representation and reasoning. Interpreted on the real line (with its Euclidean metric), it is a natural fragment of decidable temporal logics for specification and verification of real-time systems. On the real plane, it is closely related to quantitative and qualitative formalisms for spatial representation and reasoning, but this time the logic becomes undecidable. (shrink)

Few people, if any, still argue that science in all its aspects is a value-free endeavor. At the very least, values affect decisions about the choice of research problems to investigate and the uses to which the results of research are applied. But what about the actual doing of science? -/- As Science, Values, and Objectivity reveals, the connections and interactions between values and science are quite complex. The essays in this volume identify the crucial values that play a role (...) in science, distinguish some of the criteria that can be used for value identification, and elaborate the conditions for warranting certain values as necessary or central to the very activity of scientific research. -/- Recently, social constructivists have taken the presence of values within the scientific model to question the basis of objectivity. However, the contributors to <I>Science, Values, and Objectivity</I> recognize that such acknowledgment of the role of values does not negate the fact that objects exist in the world. Objects have the power to constrain our actions and thoughts, though the norms for these thoughts lie in the public, social world. -/- Values may be decried or defended, praised or blamed, but in a world that strives for a modicum of reason, values, too, must be reasoned. Critical assessment of the values that play a role in scientific research is as much a part of doing good science as interpreting data. (shrink)

In information security research, perceived security usually has a negative meaning, when it is used in contrast to actual security. From a phenomenological perspective, however, perceived security is all we have. This paper develops a phenomenological account of information security, in which a distinction is made between revealed and reveiled security instead. Linking these notions with the concepts of confidence and trust, the paper provides a phenomenological explanation of the electronic voting controversy in the Netherlands.

Mimesis as Make-Believe is important reading for everyone interested in the workings of representational art.

As forms of private self-regulation, multi-stakeholder initiatives have emerged as an important empirical phenomenon in global governance processes. At the same time, MSIs are also theoretically intriguing because of their inherent double nature. On the one hand, MSIs spell out CSR standards that define norms for corporate behavior. On the other hand, MSIs are also the result of corporate and stakeholder behavior. We combine the perspectives of institutional theory and club theory to conceptualize this double nature of MSIs. Based on (...) a stage model that looks at the interplay of actor and institutional dynamics, we generate insights into why actors join a voluntary MSI, how the various motivations and intentions of the actors influence the standard development, and how these as well as the MSI design are subsequently influenced by both external and internal dynamics. (shrink)

In this paper, we introduce a new fragment of the first-order temporal language, called the monodic fragment, in which all formulas beginning with a temporal operator have at most one free variable. We show that the satisfiability problem for monodic formulas in various linear time structures can be reduced to the satisfiability problem for a certain fragment of classical first-order logic. This reduction is then used to single out a number of decidable fragments of first-order temporal logics and of two-sorted (...) first-order logics in which one sort is intended for temporal reasoning. Besides standard first-order time structures, we consider also those that have only finite first-order domains, and extend the results mentioned above to temporal logics of finite domains. We prove decidability in three different ways: using decidability of monadic second-order logic over the intended flows of time, by an explicit analysis of structures with natural numbers time, and by a composition method that builds a model from pieces in finitely many steps. (shrink)

Flow is a gratifying state of deep involvement and absorption that individuals report when facing a challenging activity and they perceive adequate abilities to cope with it. The flow concept was introduced by Csikszentmihalyi in 1975, and interest in flow research is growing. However, to our best knowledge, no scoping review exists that takes a systematic look at studies on flow which were published between the years 2000 and 2016. Overall, 252 studies have been included in this review. Our review (...) provides a framework to cluster flow research, gives a systematic overview about existing studies and their findings, and provides an overview about implications for future research. The provided framework consists of three levels of flow research. In the first “Individual” level are the categories for personality, motivation, physiology, emotion, cognition, and behavior. The second “Contextual” level contains the categories for contextual and interindividual factors and the third “Cultural” level contains cultural factors that relate to flow. Using our framework, we systematically present the findings for each category. While flow research has made progress in understanding flow, in the future, more experimental and longitudinal studies are needed to gain deeper insights into the causal structure of flow and its antecedents and consequences. (shrink)

There is a common problem in artificial intelligence (AI) and information security. In AI, an expert system needs to be able to justify and explain a decision to the user. In information security, experts need to be able to explain to the public why a system is secure. In both cases, an important goal of explanation is to acquire or maintain the users’ trust. In this paper, I investigate the relation between explanation and trust in the context of computing science. (...) This analysis draws on literature study and concept analysis, using elements from system theory as well as actor-network theory. I apply the conceptual framework to both AI and information security, and show the benefit of the framework for both fields by means of examples. The main focus is on expert systems (AI) and electronic voting systems (security). Finally, I discuss consequences of the analysis for ethics in terms of (un)informed consent and dissent, and the associated division of responsibilities. (shrink)