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Alethic-Deontic Logic and the Alethic-Deontic Octagon
Stockholm University, Faculty of Humanities, Department of Philosophy.
2015 (English)In: Filosofiska notiser, ISSN 2002-0198, Vol. 2, no 3, 27-68 p.Article in journal (Other academic) Published
Abstract [en]

This paper will introduce and explore a set of alethic-deontic systems. Alethic-deontic logic is a form of logic that combines ordinary (alethic) modal logic, which deals with modal concepts such as necessity, possibility and impossibility, and deontic logic, which investigates normative expressions such as “ought”, “right” and “wrong”. I describe all the systems axiomatically. I say something about their properties and prove some theorems in and about them. We will be especially interested in how the different deontic and modal concepts are related to each other in various systems. We will map these relationships in an alethic-deontic octagon, a figure similar to the classical so-called square of opposition.

Place, publisher, year, edition, pages
2015. Vol. 2, no 3, 27-68 p.
National Category
Philosophy
Research subject
Philosophy
Identifiers
URN: urn:nbn:se:su:diva-124549OAI: oai:DiVA.org:su-124549DiVA: diva2:889822
Available from: 2015-12-28 Created: 2015-12-28 Last updated: 2015-12-30Bibliographically approved

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Rönnedal, Daniel
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