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  1. Input/output logics.David Makinson & Leendert van der Torre - 2000 - Journal of Philosophical Logic 29 (4):383-408.
    In a range of contexts, one comes across processes resembling inference, but where input propositions are not in general included among outputs, and the operation is not in any way reversible. Examples arise in contexts of conditional obligations, goals, ideals, preferences, actions, and beliefs. Our purpose is to develop a theory of such input/output operations. Four are singled out: simple-minded, basic (making intelligent use of disjunctive inputs), simple-minded reusable (in which outputs may be recycled as inputs), and basic reusable. They (...)
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  • Constraints for Input/Output Logics.David Makinson & Leendert van der Torre - 2001 - Journal of Philosophical Logic 30 (2):155 - 185.
    In a previous paper we developed a general theory of input/output logics. These are operations resembling inference, but where inputs need not be included among outputs, and outputs need not be reusable as inputs. In the present paper we study what happens when they are constrained to render output consistent with input. This is of interest for deontic logic, where it provides a manner of handling contrary-to-duty obligations. Our procedure is to constrain the set of generators of the input/output system, (...)
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  • Input/Output Logics.David Makinson & Leendert van der Torre - 2000 - Journal of Philosophical Logic 29 (4):383 - 408.
    In a range of contexts, one comes across processes resembling inference, but where input propositions are not in general included among outputs, and the operation is not in any way reversible. Examples arise in contexts of conditional obligations, goals, ideals, preferences, actions, and beliefs. Our purpose is to develop a theory of such input/output operations. Four are singled out: simple-minded, basic (making intelligent use of disjunctive inputs), simple-minded reusable (in which outputs may be recycled as inputs), and basic reusable. They (...)
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  • On the formal representation of rights relations.David Makinson - 1986 - Journal of Philosophical Logic 15 (4):403 - 425.
    A discussion of work formalising Hohfeld's classic taxonomy of rights relations between two parties.
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  • A Formal Characterisation Of Institutionalised Power.Andrew Jones & Marek Sergot - 1996 - Logic Journal of the IGPL 4 (3):427-443.
    We extend the monotonic and regular modal logics to the multi-modal cue, and give semantical characterization w.r.t. a semantics of minimal frames. For this we introduce a calculus over neighbourhoods and we obtain simpler conditions than those from the literature.
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  • Rights and Parliamentarism.Stig Kanger & Helle Kanger - 1966 - Theoria 32 (2):85-115.
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  • An Algebraic Analysis of Normative Systems.Jan Odelstad Lars Lindahl - 2000 - Ratio Juris 13 (3):261-278.
    In the present paper we study how subsystems of a normative system can be combined, and the role of such combinations for the understanding of hypothetical legal consequences. A combination of two subsystems is often accomplished by a normative correlation or an intermediate concept. To obtain a detailed analysis of such phenomena we use an algebraic framework. Normative systems are represented as algebraic structures over sets of conditions. This representation makes it possible to study normative systems using an extension of (...)
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  • An Algebraic Analysis of Normative Systems.Lars Lindahl & Jan Odelstad - 2000 - Ratio Juris 13 (3):261-278.
    In the present paper we study how subsystems of a normative system can be combined, and the role of such combinations for the understanding of hypothetical legal consequences. A combination of two subsystems is often accomplished by a normative correlation or an intermediate concept. To obtain a detailed analysis of such phenomena we use an algebraic framework. Normative systems are represented as algebraic structures over sets of conditions. This representation makes it possible to study normative systems using an extension of (...)
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  • Normative systems represented by boolean quasi-orderings.Jan Odelstad & Lars Lindahl - 2000 - Nordic Journal of Philosophical Logic 5 (2):161-174.
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