14 research outputs found

    Logics of formal inconsistency

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    Orientadores: Walter Alexandre Carnielli, Carlos M. C. L. CaleiroTexto em ingles e portuguesTese (doutorado) - Universidade Estadual de Campinas, Instituto de Filosofia e Ciencias HumanasTese (doutorado) - Universidade Tecnica de Lisboa, Instituto Superior TecnicoResumo: Segundo a pressuposição de consistência clássica, as contradições têm um cará[c]ter explosivo; uma vez que estejam presentes em uma teoria, tudo vale, e nenhum raciocínio sensato pode então ter lugar. Uma lógica é paraconsistente se ela rejeita uma tal pressuposição, e aceita ao invés que algumas teorias inconsistentes conquanto não-triviais façam perfeito sentido. A? Lógicas da Inconsistência Formal, LIFs, formam uma classe de lógicas paraconsistentes particularmente expressivas nas quais a noção meta-teónca de consistência pode ser internalizada ao nível da linguagem obje[c]to. Como consequência, as LIFs são capazes de recapturar o raciocínio consistente pelo acréscimo de assunções de consistência apropriadas. Assim, por exemplo, enquanto regras clássicas tais como o silogismo disjuntivo (de A e {não-,4)-ou-13, infira B) estão fadadas a falhar numa lógica paraconsistente (pois A e (nao-A) poderiam ambas ser verdadeiras para algum A, independentemente de B), elas podem ser recuperadas por uma LIF se o conjunto das premissas for ampliado pela presunção de que estamos raciocinando em um ambiente consistente (neste caso, pelo acréscimo de (consistente-.A) como uma hipótese adicional da regra). A presente monografia introduz as LIFs e apresenta diversas ilustrações destas lógicas e de suas propriedades, mostrando que tais lógicas constituem com efeito a maior parte dos sistemas paraconsistentes da literatura. Diversas formas de se efe[c]tuar a recaptura do raciocínio consistente dentro de tais sistemas inconsistentes são também ilustradas Em cada caso, interpretações em termos de semânticas polivalentes, de traduções possíveis ou modais são fornecidas, e os problemas relacionados à provisão de contrapartidas algébricas para tais lógicas são examinados. Uma abordagem formal abstra[cjta é proposta para todas as definições relacionadas e uma extensa investigação é feita sobre os princípios lógicos e as propriedades positivas e negativas da negação.Abstract: According to the classical consistency presupposition, contradictions have an explosive character: Whenever they are present in a theory, anything goes, and no sensible reasoning can thus take place. A logic is paraconsistent if it disallows such presupposition, and allows instead for some inconsistent yet non-trivial theories to make perfect sense. The Logics of Formal Inconsistency, LFIs, form a particularly expressive class of paraconsistent logics in which the metatheoretical notion of consistency can be internalized at the object-language level. As a consequence, the LFIs are able to recapture consistent reasoning by the addition of appropriate consistency assumptions. So, for instance, while classical rules such as disjunctive syllogism (from A and (not-A)-or-B, infer B) are bound to fail in a paraconsistent logic (because A and (not-.4) could both be true for some A, independently of B), they can be recovered by an LFI if the set of premises is enlarged by the presumption that we are reasoning in a consistent environment (in this case, by the addition of (consistent-/!) as an extra hypothesis of the rule). The present monograph introduces the LFIs and provides several illustrations of them and of their properties, showing that such logics constitute in fact the majority of interesting paraconsistent systems from the literature. Several ways of performing the recapture of consistent reasoning inside such inconsistent systems are also illustrated. In each case, interpretations in terms of many-valued, possible-translations, or modal semantics are provided, and the problems related to providing algebraic counterparts to such logics are surveyed. A formal abstract approach is proposed to all related definitions and an extended investigation is carried out into the logical principles and the positive and negative properties of negation.DoutoradoFilosofiaDoutor em Filosofia e Matemátic

    Supervenience, Dependence, Disjunction

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    This paper explores variations on and connections between the topics mentioned in its title, using as something of an anchor the discussion in Valentin Goranko and Antti Kuusisto’s “Logics for propositional determinacy and independence”, a venture into what the authors call the logic of determinacy, which they contrast with (a demodalized version of) Jouko Väänänen’s modal dependence logic. As they make clear in their discussion, these logics are closely connected with the topics of noncontingency and supervenience. Two opening sections of the present paper address some of these connections, including related earlier logical work by the present author as well as very recent work by Jie Fan. The Väänänen-inspired treatment is presented in a third section, and then, in Sections 4 and 5, as a kind of centerpiece for the discussion, we follow Goranko and Kuusisto in elaborating one principal reason offered for preferring their own approach over that treatment, which concerns some anomalies over the behaviour of disjunction in the latter treatment. Sections 6 and 7 look at dependence and (several different versions of) disjunction in inquisitive logic, especially as presented by Ivano Ciardelli. Section 8 revisits the less formal property-supervenience literature with issues from the first two sections of the paper in mind, and we conclude with a Postscript addressing a further conceptual issue pertaining to the relation between modal and quantificational dependence logics

    When Extrinsic Incentives Displace Intrinsic Motivation: Designing Legal Carrots and Sticks to Confront the Challenge of Motivational Crowding-Out

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    The rise of “nudges” has inspired countless efforts to encourage individual choices that maximize personal and collective welfare, with a preference for less restrictive tools such as setting default options or reordering choice sets. As part of this trend, there has been renewed interest in the behavioral impacts of incentives – namely, rewards or penalties for shaping individual choices, including but not limited to financial incentives. Explicit incentives are pervasive in the law, including carrots offered by governments (for example, tax deductions for charitable contributions, rebates for recycling, sentence reductions for prisoners who complete drug rehabilitation programs, and incentives for criminal informants) and statutes or regulations that govern incentives offered by private parties (for example, workplace wellness programs, compensation for blood and organ donation, and pay-for-performance in executive compensation). But despite the intuitive appeal of incentives, legal commentators have expressed increasing alarm about a potential drawback: research in behavioral economics and psychology has come to show many ways in which the use of carrots and sticks may displace other motivations for good behavior, such as altruism, civic duty, or professionalism. In legal scholarship, prevailing views of motivational crowding-out – the process by which incentives can interfere with “intrinsic” motivations for behavior – suggest that this phenomenon is an irremediable response to incentive-based policies. This Article examines a large but neglected body of empirical and theoretical literature on motivational crowding-out to show that these beliefs may be misguided. Motivational crowding-out is in fact a catch-all term for a diverse set of cognitive and behavioral processes that range from long-term changes in preferences, to the impairment of self-determination, to a complex set of signals that incentives can send to people about their abilities, social environment, values, and employers. Far from being inevitable, motivational crowding-out is responsive to changes in the way we design incentive-based policies. That is, once we understand the mechanisms of crowding-out, we can modify the incentive architecture to either minimize or amplify crowding-out effects. Remedies, however, must be tailored to the diverse causes of crowding-out, and the law has not yet recognized this problem. In light of deep anxieties about motivational crowding-out throughout the law, this Article proposes a taxonomy of crowding-out processes and introduces “incentive architecture:” the deliberate structuring of incentives to address crowding-out effects

    When Extrinsic Incentives Displace Intrinsic Motivation: Designing Legal Carrots and Sticks to Confront the Challenge of Motivational Crowding-Out

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    The rise of “nudges” has inspired countless efforts to encourage individual choices that maximize personal and collective welfare, with a preference for less restrictive tools such as setting default options or reordering choice sets. As part of this trend, there has been renewed interest in the behavioral impacts of incentives – namely, rewards or penalties for shaping individual choices, including but not limited to financial incentives. Explicit incentives are pervasive in the law, including carrots offered by governments (for example, tax deductions for charitable contributions, rebates for recycling, sentence reductions for prisoners who complete drug rehabilitation programs, and incentives for criminal informants) and statutes or regulations that govern incentives offered by private parties (for example, workplace wellness programs, compensation for blood and organ donation, and pay-for-performance in executive compensation). But despite the intuitive appeal of incentives, legal commentators have expressed increasing alarm about a potential drawback: research in behavioral economics and psychology has come to show many ways in which the use of carrots and sticks may displace other motivations for good behavior, such as altruism, civic duty, or professionalism. In legal scholarship, prevailing views of motivational crowding-out – the process by which incentives can interfere with “intrinsic” motivations for behavior – suggest that this phenomenon is an irremediable response to incentive-based policies. This Article examines a large but neglected body of empirical and theoretical literature on motivational crowding-out to show that these beliefs may be misguided. Motivational crowding-out is in fact a catch-all term for a diverse set of cognitive and behavioral processes that range from long-term changes in preferences, to the impairment of self-determination, to a complex set of signals that incentives can send to people about their abilities, social environment, values, and employers. Far from being inevitable, motivational crowding-out is responsive to changes in the way we design incentive-based policies. That is, once we understand the mechanisms of crowding-out, we can modify the incentive architecture to either minimize or amplify crowding-out effects. Remedies, however, must be tailored to the diverse causes of crowding-out, and the law has not yet recognized this problem. In light of deep anxieties about motivational crowding-out throughout the law, this Article proposes a taxonomy of crowding-out processes and introduces “incentive architecture:” the deliberate structuring of incentives to address crowding-out effects

    Multi-type maltreatment : relationships between familial characteristics, maltreatment and adjustment of children and adults

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    This thesis examines the nature, extent and impact of multiple forms of maltreatment (multi-type maltreatment) from within a developmental victimological framework. The interrelationships between sexual abuse, physical abuse, psychological maltreatment, neglect, and witnessing family violence are assessed. The role of family variables in predicting maltreatment and the relative contribution of child maltreatment and family variables to adjustment are evaluated. Risk factors for multi-type maltreatment, and the relationship between multi-type maltreatment and adjustment are explored. The major theories of child development are reviewed. As well as exploring the relevance of developmental theories to understanding the impact of child maltreatment, factors influencing the emergence of child psychopathology are reviewed from a developmental psychopathology perspective. Ecological and developmental perspectives on how child maltreatment translates into the behavioural and emotional adjustment problems of children are integrated in the Child Maltreatment: Risk and Protection Model. After exploring some of the relevant conceptual issues, the literature on the prevalence and impact of each maltreatment type is reviewed, and the literature on multi-type maltreatment critiqued. Methodological and ethical concerns with the conduct of research in the field of child maltreatment using direct assessment of children led to the need for an instrument to assess parent perceptions of each of the types of abuse and neglect, as well as adult retrospective reports. Data are presented from two cross-sectional questionnaire-based studies using the Parent and Adult versions of the Family and Life Experiences Questionnaire which was designed to assess perceptions of children\u27s experiences of sexual abuse, physical abuse, psychological maltreatment, neglect and witnessing family violence. Problems with the isolated focus of research on single forms of child maltreatment are addressed by the inclusion of each of these forms of child maltreatment within a single research design. Respondents for both studies were volunteers recruited from counselling agencies, medical, community health, child care and fitness centres and a first year psychology course. Parents (N=50) described their perceptions of primary school children\u27s family characteristics, experiences of maltreatment and adjustment. Children\u27s behavioural adjustment (internalising and externalising), sexual behaviours, emotions, self-esteem, gender identity, family adaptability and cohesion, parental traditionality, parental sexual punitiveness, interparental relationship satisfaction, and demographic characteristics are assessed in the study of Parents\u27 perceptions. A large degree of overlap between the different types of abuse and neglect was found, with a high proportion of parents describing children\u27s experiences of multiple forms of child maltreatment. Using both maltreatment and family characteristics to predict internalising behaviour problems, neglect and family cohesion were the only unique predictors. Family adaptability and cohesion were the only unique predictors of externalising behaviour problems. Physical and sexual abuse were not predicted from family characteristics; neglect was predicted, but no variables provided unique prediction. Unique predictors of psychological maltreatment were family cohesion, parental sexual punitiveness and divorce. Divorce was the only variable with significant unique prediction of the child witnessing family violence. Family background and family functioning were found to predict some forms of maltreatment, but to also be important factors mediating the adjustment of children, independent of maltreatment. The results are interpreted within an ecological framework, integrating risk factors for maltreatment with experiences of abuse and neglect and subsequent adjustment in childhood. Retrospective reports of adults\u27 (N=175) own childhood family characteristics, experiences of maltreatment, and reports of their current adjustment are also studied. Included with the adult version of the FLEQ were the Trauma Symptom Checklist-40, Rosenberg\u27s Self-esteem Scale, and the Family and Adaptability and Cohesion Evaluation Scale-II. Similar results were found in the in the Adult Study. As hypothesised, adult retrospective reports of the five different types of child maltreatment were found to be highly intercorrelated. Family characteristics predicted maltreatment and adjustment scores and discriminated between single and multi-type maltreatment. Maltreatment scores also predicted adult adjustment. As the number of maltreatment types increased, there was an increase in the number of adjustment problems reported. Alternate hypotheses regarding the possible operation of mediating and moderating processes in the relationships between family characteristics, maltreatment and the adjustment of adults were assessed. Finally, the results of these investigations are discussed and interpreted in the light of extant findings previously reviewed. Data from the two major empirical studies are used to demonstrate the overlap between different child maltreatment categories, and the extent and impact of multi-type maltreatment. The results show that children are vulnerable to more than one type of maltreatment. Individuals who experience a number of different forms of maltreatment had greater adjustment problems than those experiencing only one or two different types of abuse or neglect. Dysfunctional families place children at risk of child maltreatment. Negative family characteristics lead to adjustment problems in children and adults. The type of maltreatment having the most damaging effect on children was neglect, and in the long-term, sexual abuse. A multi-dimensional approach to prevention and intervention needs to be adopted, based on the co-morbidity of maltreatment types, and the likelihood of children experiencing further abuse or neglect of a different type. Dysfunctional family dynamics which place children at risk of multi-type maltreatment, and mediate the effects of maltreatment on adjustment, need to be specifically targeted with support and family intervention strategies. Risk-assessment measures used by Child Protection workers must include adequate knowledge of the inter-relationships between maltreatment types, and the particularly negative impact on adjustment of experiencing many forms of abuse or neglect. Suggestions for future clinical and research work in the area of child maltreatment are developed. The importance of assessing all forms of maltreatment when examining the relationships of maltreatment to adjustment is emphasised. It is recommended that prevention and intervention strategies acknowledge the interrelationships between maltreatment types

    University of Minnesota-Morris Bulletin 1997-1999

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    https://digitalcommons.morris.umn.edu/catalog/1032/thumbnail.jp

    University of Minnesota-Morris Bulletin 1995-1997

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    https://digitalcommons.morris.umn.edu/catalog/1031/thumbnail.jp
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