Made available in DSpace on 2015-05-14T12:11:48Z (GMT). No. of bitstreams: 1 ArquivoTotalEugenia.pdf: 1111400 bytes, checksum: 8d0150bdfd73d917028015cfe5760882 (MD5) Previous issue date: 2013-03-15 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This work deals with the question of logical consistency inside the context of moral dilemmas or, more specifically, genuine moral dilemmas, which are situations where someone has a conflict between two obligatory actions guided by the same moral principle. In other words, it is a situation where there are two moral obligations which should be satisfied, but since they are incompatible, while sometimes one is the negation of the other, they cannot be both accomplished. When we formalize moral dilemmas along with some deontic principles, the result is a contradiction. Inside the framework of classical deontic logic, due to its limitation of dealing with paradoxes of such kind, the existence of moral dilemmas is taken as something absurd, as an affront to rationality. Thus, given the inconsistency, the solution would be to deny the existence of the dilemmas, which has been the most widespread solution, or to deny the deontic principles involved in the inconsistency. We do not agree with these two solutions. Instead, we propose to weaken the rationalist argumentation based on the existence of dialetheias and on the suggestion of dealing with moral dilemmas inside a paraconsistent framework, in such a way that the existence of inconsistence would not be a reason any more to deny the existence of such dilemmas. / RESUMOO presente trabalho aborda a questão da consistência lógica dentro do contexto dos dilemas morais; mais especificamente dilemas morais genuínos, que são situações nas quais uma pessoa tem o conflito entre duas ações obrigatórias guiadas pelo mesmo princípio. Ou seja, existem duas obrigações que deveriam ser satisfeitas, mas por se tratarem de ações incompatíveis, em que uma é a negação da outra, não podem ambas ser praticadas. Quando se faz a formalização do dilema moral conjuntamente com alguns princípios deônticos o resultado é uma contradição. Dentro do framework da Lógica Deôntica clássica, por causa de sua limitação em tratar com paradoxos devido a alguns princípios clássicos, a existência dos dilemas morais é tida como algo absurdo ou uma afronta à racionalidade. Assim, dada à inconsistência, a solução seria negar a existência dos dilemas ou negar os princípios deônticos envolvidos na inconsistência. A solução mais propagada foi a negação da existência dos dilemas. Entretanto, discordando dessa solução, tentamos enfraquecer a argumentação racionalista com base na ideia de dialetéias e consequentemente sugerindo que, se os dilemas morais forem tratados em um framework paraconsistente a inconsistência não seria motivo suficiente para negar a existência desses dilemas.

Submitted by Marlene Santos (marlene.bc.ufg@gmail.com) on 2014-09-19T21:05:56Z No. of bitstreams: 2 Barros, Toni Cézar P. F..pdf: 1070248 bytes, checksum: c077f85b2926645e0b58a66a7f389dd4 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Approved for entry into archive by Cláudia Bueno (claudiamoura18@gmail.com) on 2014-09-28T02:24:15Z (GMT) No. of bitstreams: 2 Barros, Toni Cézar P. F..pdf: 1070248 bytes, checksum: c077f85b2926645e0b58a66a7f389dd4 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Made available in DSpace on 2014-09-28T02:24:15Z (GMT). No. of bitstreams: 2 Barros, Toni Cézar P. F..pdf: 1070248 bytes, checksum: c077f85b2926645e0b58a66a7f389dd4 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2014-02-17 / There are two questions about deontic logic that appear frequently in the literature on the subject. The first concerns the legitimacy and the second the deontic paradoxes. The first of these, however, is not the main concern of this paper, we assume, alongside Castañeda the thesis that there are logical relationships, not only between propositions, but also among imperatives and norms. Thus, the main focus of this paper will be to investigate deontic paradoxes, and in particular, the Castañeda‟s solution. This solution involves a distinction between propositions and practitions as well as between imperatives and norms. We also show the advantage of this solution compared to other solution named scope deontic operator. Finally, we analyze Lou Goble‟s criticism to Castañeda‟s solution and objections to this criticism. / Há duas questões acerca da lógica deôntica que aparecem com frequência na literatura sobre o tema. A primeira diz respeito à sua legitimidade e a segunda aos paradoxos deônticos. A primeira destas, entretanto, não é a principal preocupação deste trabalho: assumiremos, ao lado de Castañeda, a tese que há relações lógicas, não somente entre proposições, mas também entre imperativos e entre normas. Assim, o foco principal deste texto consistirá em investigar o problema dos paradoxos deônticos e, em particular, a proposta de solução de Castañeda aos mesmos. Tal solução envolve a distinção entre proposições e practições, bem como entre imperativos e normas. Também mostraremos a vantagem desta solução em relação às outras, denominadas de soluções de escopo do operador deôntico. E, por fim, analisaremos a crítica de Lou Goble à solução de Castañeda e objeções a esta crítica.

The cloud computing paradigm introduces an efficient utilisation of huge computing resources by multiple users with minimal expense and deployment effort compared to traditional computing facilities. Although cloud computing has incredible benefits, some governments and enterprises remain hesitant to transfer their computing technology to the cloud as a consequence of the associated security challenges. Security is, therefore, a significant factor in cloud computing adoption. Cloud services consist of three layers: Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). Cloud computing services are accessed through network connections and utilised by multi-users who can share the resources through virtualisation technology. Accordingly, an efficient access control system is crucial to prevent unauthorised access. This thesis mainly investigates the IaaS security enhancement from an access control point of view.

The thesis aims at developing approaches to transport policy decisions, based on suggestions and ideas originating from moral philosophy and philosophical decision theory.Paper I analyzes the Swedish transport policy goals, and the problem of combining policygoals with welfare economics. A problem of circularity arises as the Swedish transport policygoals are conflicting, and hence must be subject to trade-offs, while several of the goals themselves entail statements on how to prioritize or restrain goals in case of conflict.Paper II analyzes rationality in road safety policy. Problematic features are identified and discussed. The paper argues that the Swedish road safety goal is rational, since it is actionguiding and achievement-inducing.Paper III includes a model of rational choice under risk with biased risk perception. Under certain plausible conditions, a regulator should raise the population’s risk exposure. By deteriorating the environment the regulator can motivate drivers to choose behaviour that is less biased.Paper IV provides a formal representation of goal systems. The focus is on three properties:consistency, conflict, and coherence. It is argued that consistency is adequately regarded as a property relative to the decision situation or, more specifically, the set of alternatives that the agent faces. Conflict is adequately regarded as a relation over subsets of a given goal systemand should likewise be regarded as relative to the set of alternative that the agent faces.Coherence is given a probabilistic interpretation, based on a support relation over subsets of goal systems.Paper V investigates problems associated with standard deontic logic. A deontic predicate is derived, which avoids some of the major paradoxes in the area. In particular, paradoxes occurring when one obligation is derived by logical necessity from another obligation are dealt with. / QC 20100806

Orientador: Marcelo Esteban Coniglio / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Filosofia e Ciencias Humanas / Made available in DSpace on 2018-08-13T04:53:14Z (GMT). No. of bitstreams: 1 Peron_NewtonMarques_M.pdf: 601027 bytes, checksum: 5828adda31c6102b730941a14056d7d9 (MD5) Previous issue date: 2009 / Resumo: Esse trabalho expõe brevemente o que são as Lógicas da Inconsistência Formal ¿Observação: O resumo, na íntegra poderá ser visualizado no texto completo da tese digital. / Abstract: This work expose briefly what are the Logics of Formal Inconsistency ...Note: The complete abstract is available with the full electronic digital thesis or dissertations. / Mestrado / Filosofia / Mestre em Filosofia

Title: Hare's thesis as a logical and philosophical problem Author: Martin Luhan Department: Department of Logic Supervisor: PhDr. Vladimír Svoboda, CSc. Abstract: The present work is aiming to analyse the problem of inferring from impe- rative premisses to an indicative conclusion which goes by the name Hare's Thesis. The logical analysis of the language of morals was the basis of Richard M. Hare's ethical studies. Therefore a brief presentation of his philosophy is given followed by a detailed walkthrough of his way of dealing with impera- tives. Hare states that logic should be interested in dealing with prescriptive sentences. The paper also presents a selection of some of the semantics of logic of imperatives and some of their fundamental problems. Based on this we finally analyse whether the Hare's Thesis which forbids inferring from im- perative premisses to indicative conclusions is acceptable. And we conclude that in most cases it is reasonable to reject it. Keywords: Logic of imperatives, Hare's Thesis, deontic logic, metaethics

Contracts are legally enforceable agreements between two or more parties. The agreements can contain temporally based conditions, such as actions taken by the contract parties or events that happen, that trigger changes to the state of the contract when the conditions become true. Since the structure of these conditions can be very complex, it can be difficult to write contracts in a natural language in a clear and unambiguous way. A better approach is to have a formal language with a precise semantics to represent contracts. Contracts expressed in such a language have a mathematically precise meaning and can be written, analyzed, and manipulated by software. This thesis presents FCL, a formal language with a precise semantics for writing general contracts that may depend on temporally based conditions. Motivated by carefully selected examples of contracts, we derive a set of desirable requirements that a formal language of contracts should support. Based on the requirements, we clearly de ne the notion of contract and address what it means to fulfill or breach a contract. We present the formal syntax and semantics of FCL. We also successfully formalize different kinds of contracts in FCL and develop a reasoning system for FCL. / Thesis / Doctor of Philosophy (PhD)

Deontic reasoning is a domain of reasoning concerning permissions, obligations, and prohibitions founded on conditional logic (Wason,1968). The inclusion of a social valence to deontic rules leads to increased rule violation identification in both adults (Cosmides & Tooby, 1992) and children (Harris & Nunez, 1996), suggesting an evolutionary advantage for a specific class of reasoning known as “cheater-detection” (Fiddick, 2004). The current investigation is the first attempt to understand the cognitive and social variables that account for children’s logical reasoning advantage in social violation situations. / Includes bibliography. / Dissertation (Ph.D.)--Florida Atlantic University, 2015 / FAU Electronic Theses and Dissertations Collection

<p>Many computer systems in our daily life require highly available applications (such as medical equipment) and some others run on difficult to access places (such as satellites). These systems are subject to a variety of potential failures that may degrade their performance. Therefore, being able to reason about faults and their impact on systems is gaining considerable attention. Existing work on fault tolerance is mostly focused on addressing faults at the programming language level. In the recent past, significant efforts have been made to use formal methods to specify and verify fault tolerant systems to provide more reliable software. Related with this, some researchers have pointed out that Deontic Logic is useful for reasoning about fault tolerant systems due to its expressive nature in relation to defining norms, used to describe expected behaviour and prescribing what happens when these norms are violated.</p> <p>In this thesis, we demonstrate how Deontic Logic can be used to model an existing real world problem concerning fault tolerance mechanisms. We consider different situations that a vehicle faces on the road and the consequent reactions of the driver or vehicle based on good and bad behaviour. We got the idea and motivation for this case study from the SASPENCE sub-project, conducted under the European Integrated Project PReVENT. This sub-project focuses on a vehicle’s behaviour in maintaining safe speed and safe distance on the road. As our first modelling attempt, we use a Propositional Deontic Logic approach, to justify to what extent we can apply this Logical approach to model a real world problem. Subsequently, we use a First Order Deontic Logic approach, as it can incorporate the use of parameters and quantification over them, which is more useful to model real world scenarios.</p> <p>We state and prove some interesting expected properties of the models using a First Order proof system. Based on these modelling exercises, we acquired different engineering ideas and lessons, and present them in this thesis in order to aid modelling of future fault tolerant systems.</p> / Master of Science (MSc)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The current dissertation has as its main objective an exposition and critical analysis of Charles Kielkopf's translation of the Standard Deontic Logic (SDL) into a normal alethic logic, and the resulting construction of a system of deontic logic that captures Kantian fundamental concepts and principles such as the concept of causal necessity and the formulations of the Categorical Imperative concerning Kingdom of Nature and Kingdom of Ends. Since this process results in an interpretation of aspects of the Kantian philosophy, it has been chosen, initially, a presentation in general lines of these concepts and, considering the difficulties regarding the applicability of a translation process between deontic and ontic principles, it was done necessary also an exhibition concerning the problem of the inferential barriers, as well as of his more immediate consequence, i. e., Jörgensen's Dilemma. In a second moment, it was also made a characterization of normal modal systems, deontic ones and alethic ones, as well as of the notions of translation between logics and of Dawson modelling. The final chapter consists of a critical examination of Kielkopf's proposal, which uses Dawson modelling to develop a deontic logic based on the alethic system K1. Such Dawson modelling allows the definition of a deontic modalities in terms of iterated alethic modalities, therefore this model constitutes a way of avoiding the problems regarding inferential barriers. The development of an alternative for attribution of logical status to deontic concepts doesn't constitute, however, in an innovative aspect of this proposal, such aspect can be founded in the use made by Kielkopf of his formal model as a tool for the investigation of philosophical concepts, such as the Kantian concepts already mentioned. / A presente dissertação tem como objetivo uma apresentação da proposta de Charles Kielkopf, de tradução da lógica deôntica standard em uma lógica normal alética e de seus resultados quanto à construção de um sistema de lógica deôntica que capture conceitos e princípios kantianos como necessidade causal e as formulações do Imperativo Categórico acerca do Reino da Natureza e do Reino dos Fins. Uma vez que este processo resulta em uma interpretação de aspectos da filosofia kantiana, optou-se inicialmente por uma apresentação em linhas gerais destas concepções e, tendo em vista as dificuldades referentes a aplicabilidade de um processo de tradução entre princípios deônticos e ônticos, fez-se necessária também uma exposição acerca do problema das barreiras inferenciais, bem como de sua conseqüência mais imediata, a saber, o Dilema de Jörgensen. Num segundo momento, também foi feita uma caracterização dos sistemas modais normais, tanto deônticos quanto aléticos, bem como da noção de tradução entre lógicas e dos modelos de Dawson. O capítulo final consiste justamente num exame crítico da proposta de Kielkopf, o qual faz uso dos modelos de Dawson para desenvolver uma lógica deôntica a partir do sistema lógico K1. Tais modelos de Dawson permitem a definição de uma lógica deôntica em termos de modalidades aléticas iteradas, com o que este modelo constitui-se em uma maneira de evitar os problemas referentes às barreiras inferenciais. O desenvolvimento de uma alternativa para a atribuição de um status lógico a concepções deônticas não constitui, contudo, o aspecto inovador desta proposta, tal aspecto encontra-se justamente na utilização por Kielkopf, de seu modelo formal como uma ferramenta para a investigação de concepções filosóficas, no caso, as concepções kantianas já citadas.