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93Safe DesignTechné: Research in Philosophy and Technology 10 (1): 45-52. 2006.Safety is an essential ethical requirement in engineering design. Strategies for safe design are used not only to reduce estimated probabilities of injuries but also to cope with hazards and eventualities that cannot be assigned meaningful probabilities. The notion of safe design has important ethical dimensions, such as that of determining the responsibility that a designer has for future uses (and misuses) of the designed object.
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258Theory contraction and base contraction unifiedJournal of Symbolic Logic 58 (2): 602-625. 1993.One way to construct a contraction operator for a theory (belief set) is to assign to it a base (belief base) and an operator of partial meet contraction for that base. Axiomatic characterizations are given of the theory contractions that are generated in this way by (various types of) partial meet base contractions
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26Structural reliabilism: Inductive logic as a theory of justificationHistory and Philosophy of Logic 26 (1): 71-72. 2005.
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677In order to avoid the paradoxes of standard deontic logic, we have to give up the semantic construction that identifies obligatory status with presence in all elements of a subset of the set of possible worlds. It is proposed that deontic logic should instead be based on a preference relation, according to the principle that whatever is better than something permitted is itself permitted. Close connections hold between the logical properties of a preference relation and those of the deontic logi…Read more
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Book Review: The Future for Philosophy, ed. by Brian Leiter (review)Disputatio 1 (20): 346-348. 2006.
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757The purpose of this presentation is to introduce both the concept of risk and the precautionary principle, that is a major policy principle in present-day risk management. Since risk has been the subject of many misconceptions I will do this in large part by criticizing seven views on risk that I believe to have caused considerable confusion both among scientists and policy-makers. But before looking at the seven myths of risk, let us begin with the basic issue of defining “risk”. The word “risk…Read more
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30Similarity semantics and minimal changes of beliefErkenntnis 37 (3): 401-429. 1992.Different similarity relations on sets are introduced, and their logical properties are investigated. Close relationships are shown to hold between similarity relations that are based on symmetrical difference and operators of belief contraction that are based on relational selection functions. Two new rationality criteria for minimal belief contraction, the maximizing property and the reducing property, are proposed
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Review of Peter T. Manicas: A history and philosophy of the social sciences (review)Theoria 54 (2): 148. 1988.
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14Some Solved and Unsolved Remainder EquationsMathematical Logic Quarterly 41 (3): 362-368. 1995.The remainder set A⟂B of a set of sentences A modulo a set of sentences B is the set of all maximal subsets of A not implying any element of B. A remainder equation is an expression containing remainder sets, such as {A} = B⟂X, in which at least one set is unknown. Solutions to some classes of remainder equations are reported, and some unsolved problems are listed
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53Specified Meet ContractionErkenntnis 69 (1): 31-54. 2008.Specified meet contraction is the operation defined by the identity where ∼ is full meet contraction and f is a sentential selector, a function from sentences to sentences. With suitable conditions on the sentential selector, specified meet contraction coincides with the partial meet contractions that yield a finite-based contraction outcome if the original belief set is finite-based. In terms of cognitive realism, specified meet contraction has an advantage over partial meet contraction in that…Read more
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Science and Technology: What They Are and Why Their Relation MattersIn Sven Ove Hansson (ed.), The Role of Technology in Science: Philosophical Perspectives, Springer Verlag. 2015.
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8Three Approaches to Finitude in Belief ChangeIn T. Rønnow-Rasmussen B. Petersson J. Josefsson D. Egonsson (ed.), Hommage à Wlodek. Philosophical Papers Dedicated to Wlodek Rabinowicz, . 2007.
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31Reconstruction of Contraction OperatorsErkenntnis 81 (1): 185-199. 2016.An operator of belief change is reconstructible as another such operator if and only if any outcome that can be obtained with the former can also be obtained with the latter. Two operators are mutually reconstructible if they generate exactly the same set of outcomes. The relations of reconstructibility among fifteen operators of contraction, including the common AGM contraction operators, are completely characterized. Furthermore, the additional such relations are characterized that arise if al…Read more
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2Risk and ethics : three approachesIn Tim Lewens (ed.), Risk: Philosophical Perspectives, Routledge. 2007.
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10Review of: Elisabeth Andersson, Value in Ethics and Economics (review)Erkenntnis 45 (1): 133-136. 1996.
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Recension av Amartya Sen: "Kollektiva beslut och social välfärd"Norsk Filosofisk Tidsskrift 10 (1): 28. 1989.
Areas of Specialization
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Areas of Interest
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