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Sven Ove Hansson [340]Sven Oven Hansson [1]
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Sven Ove Hansson
Royal Institute of Technology, Stockholm
  1. Ethical Criteria of Risk Acceptance.Sven Ove Hansson - 2003 - Erkenntnis 59 (3):291 - 309.
    Mainstream moral theories deal with situations in which the outcome of each possible action is well-determined and knowable. In order to make ethics relevant for problems of risk and uncertainty, moral theories have to be extended so that they cover actions whose outcomes are not determinable beforehand. One approach to this extension problem is to develop methods for appraising probabilistic combinations of outcomes. This approach is investigated and shown not to solve the problem. An alternative approach is then developed. Its (...)
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  2. Philosophical Problems in Cost–Benefit Analysis.Sven Ove Hansson - 2007 - Economics and Philosophy 23 (2):163-183.
    Cost–benefit analysis (CBA) is much more philosophically interesting than has in general been recognized. Since it is the only well-developed form of applied consequentialism, it is a testing-ground for consequentialism and for the counterfactual analysis that it requires. Ten classes of philosophical problems that affect the practical performance of cost–benefit analysis are investigated: topic selection, dependence on the decision perspective, dangers of super synopticism and undue centralization, prediction problems, the indeterminateness of our control over future decisions, the need to exclude (...)
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  3. Philosophical Perspectives on Risk.Sven Ove Hansson - 2004 - Techné: Research in Philosophy and Technology 8 (1):10-35.
    In non-technical contexts, the word “risk” refers, often rather vaguely, to situations in which it is possible but not certain that some undesirable event will occur. In technical contexts, the word has many uses and specialized meanings. The most common ones are the following.
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  4.  23
    The Ethics of Doing Ethics.Sven Ove Hansson - 2017 - Science and Engineering Ethics 23 (1):105-120.
    Ethicists have investigated ethical problems in other disciplines, but there has not been much discussion of the ethics of their own activities. Research in ethics has many ethical problems in common with other areas of research, and it also has problems of its own. The researcher’s integrity is more precarious than in most other disciplines, and therefore even stronger procedural checks are needed to protect it. The promotion of some standpoints in ethical issues may be socially harmful, and even our (...)
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  5. A Survey of Multiple Contractions.André Fuhrmann & Sven Ove Hansson - 1994 - Journal of Logic, Language and Information 3 (1):39-75.
    The AGM theory of belief contraction is extended tomultiple contraction, i.e. to contraction by a set of sentences rather than by a single sentence. There are two major variants: Inpackage contraction all the sentences must be removed from the belief set, whereas inchoice contraction it is sufficient that at least one of them is removed. Constructions of both types of multiple contraction are offered and axiomatically characterized. Neither package nor choice contraction can in general be reduced to contractions by single (...)
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  6.  65
    Science Denial as a Form of Pseudoscience.Sven Ove Hansson - 2017 - Studies in History and Philosophy of Science Part A 63:39-47.
  7. In Defense of the Ramsey Test.Sven Ove Hansson - 1992 - Journal of Philosophy 89 (10):522.
  8. Ten Philosophical Problems in Belief Revision.Sven Ove Hansson - 2003
    The paper introduces ten open problems in belief revision theory, related to the representation of the belief state, to different notions of degrees of belief, and to the nature of change operations. It is argued that these problems are all issues in philosopical logic, in the strong sense of requiring inputs from both logic and philosophy for their solution.
     
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  9.  46
    Belief Contraction Without Recovery.Sven Ove Hansson - 1991 - Studia Logica 50 (2):251 - 260.
    The postulate of recovery is commonly regarded to be the intuitively least compelling of the six basic Gärdenfors postulates for belief contraction. We replace recovery by the seemingly much weaker postulate of core-retainment, which ensures that if x is excluded from K when p is contracted, then x plays some role for the fact that K implies p. Surprisingly enough, core-retainment together with four of the other Gärdenfors postulates implies recovery for logically closed belief sets. Reasonable contraction operators without recovery (...)
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  10. Seven Myths of Risk.Sven Ove Hansson - unknown
    The 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”. (...)
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  11.  5
    Belief Change: Introduction and Overview.Eduardo Fermé & Sven Ove Hansson - 2018 - Springer Verlag.
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  12. Theory Contraction and Base Contraction Unified.Sven Ove Hansson - 1993 - Journal of Symbolic Logic 58 (2):602-625.
    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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  13.  49
    Reversing the Levi Identity.Sven Ove Hansson - 1993 - Journal of Philosophical Logic 22 (6):637 - 669.
    The AGM (Alchourrón-Gärdenfors-Makinson) model of belief change is extended to cover changes on sets of beliefs that are not closed under logical consequence (belief bases). Three major types of change operations, namely contraction, internal revision, and external revision are axiomatically characterized, and their interrelations are studied. In external revision, the Levi identity is reversed in the sense that one first adds the new belief to the belief base, and afterwards contracts its negation. It is argued that external revision represents an (...)
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  14.  81
    The Structure of Values and Norms.Sven Ove Hansson - 2001 - Cambridge University Press.
    Formal representations of values and norms are employed in several academic disciplines and specialties, such as economics, jurisprudence, decision theory and social choice theory. Sven Ove Hansson closely examines such foundational issues as the values of wholes and the values of their parts, the connections between values and norms, how values can be decision-guiding and the structure of normative codes with formal precision. Models of change in both preferences and norms are offered, as well as a method to base the (...)
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  15.  69
    AGM 25 Years: Twenty-Five Years of Research in Belief Change.Eduardo Fermé & Sven Ove Hansson - 2011 - Journal of Philosophical Logic 40 (2):295 - 331.
    The 1985 paper by Carlos Alchourrón (1931–1996), Peter Gärdenfors, and David Makinson (AGM), "On the Logic of Theory Change: Partial Meet Contraction and Revision Functions" was the starting-point of a large and rapidly growing literature that employs formal models in the investigation of changes in belief states and databases. In this review, the first twentyfive years of this development are summarized. The topics covered include equivalent characterizations of AGM operations, extended representations of the belief states, change operators not included in (...)
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  16. Cutting the Gordian Knot of Demarcation.Sven Ove Hansson - 2009 - International Studies in the Philosophy of Science 23 (3):237-243.
    A definition of pseudoscience is proposed, according to which a statement is pseudoscientific if and only if it (1) pertains to an issue within the domains of science, (2) is not epistemically warranted, and (3) is part of a doctrine whose major proponents try to create the impression that it is epistemically warranted. This approach has the advantage of separating the definition of pseudoscience from the justification of the claim that science represents the most epistemically warranted statements. The definition is (...)
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  17.  18
    Philosophical Plagiarism Under the Spotlight.Sven Ove Hansson - 2019 - Theoria 85 (2):61-68.
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  18.  27
    AGM 25 Years: Twenty-Five Years of Research in Belief Change.Eduardo Fermé & Sven Ove Hansson - 2011 - Journal of Philosophical Logic 40 (2):295-331.
    The 1985 paper by Carlos Alchourrón, Peter Gärdenfors, and David Makinson, “On the Logic of Theory Change: Partial Meet Contraction and Revision Functions” was the starting-point of a large and rapidly growing literature that employs formal models in the investigation of changes in belief states and databases. In this review, the first twenty-five years of this development are summarized. The topics covered include equivalent characterizations of AGM operations, extended representations of the belief states, change operators not included in the original (...)
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  19.  67
    Kernel Contraction.Sven Ove Hansson - 1994 - Journal of Symbolic Logic 59 (3):845-859.
    Kernel contraction is a natural nonrelational generalization of safe contraction. All partial meet contractions are kernel contractions, but the converse relationship does not hold. Kernel contraction is axiomatically characterized. It is shown to be better suited than partial meet contraction for formal treatments of iterated belief change.
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  20.  46
    Specified Meet Contraction.Sven Ove Hansson - 2008 - Erkenntnis 69 (1):31-54.
    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 the selection mechanism operates on sentences rather (...)
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  21.  29
    Risk.Sven Ove Hansson - 2008 - Stanford Encyclopedia of Philosophy.
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  22. Falsificationism Falsified.Sven Ove Hansson - 2006 - Foundations of Science 11 (3):275-286.
    A conceptual analysis of falsificationism is performed, in which the central falsificationist thesis is divided into several components. Furthermore, an empirical study of falsification in science is reported, based on the 70 scientific contributions that were published as articles in Nature in 2000. Only one of these articles conformed to the falsificationist recipe for successful science, namely the falsification of a hypothesis that is more accessible to falsification than to verification. It is argued that falsificationism relies on an incorrect view (...)
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  23.  37
    Logic of Belief Revision.Sven Ove Hansson - 2008 - Stanford Encyclopedia of Philosophy.
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  24.  2
    Descriptor Revision.Sven Ove Hansson - 2017 - Springer Verlag.
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  25.  28
    Descriptor Revision.Sven Ove Hansson - 2014 - Studia Logica 102 (5):955-980.
    A descriptor is a set of sentences that are truth-functional combinations of expressions of the form \ , where \ is a metalinguistic belief predicate and p a sentence in the object language in which beliefs are expressed. Descriptor revision ) is an operation of belief change that takes us from a belief set K to a new belief set \ where \ is a descriptor representing the success condition. Previously studied operations of belief change are special cases of descriptor (...)
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  26.  12
    Anonymous Philosophical Communication.Sven Ove Hansson - 2018 - Theoria 84 (2):113-119.
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  27. Formalization in Philosophy.Sven Ove Hansson - 2000 - Bulletin of Symbolic Logic 6 (2):162-175.
    The advantages and disadvantages of formalization in philosophy are summarized. It is concluded that formalized philosophy is an endangered speciality that needs to be revitalized and to increase its interactions with non-formalized philosophy. The enigmatic style that is common in philosophical logic must give way to explicit discussions of the problematic relationship between formal models and the philosophical concepts and issues that motivated their development.
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  28.  51
    Great Uncertainty About Small Things.Sven Ove Hansson - 2004 - Techne 8 (2):26-35.
  29.  93
    From the Casino to the Jungle: Dealing with Uncertainty in Technological Risk Management.Sven Ove Hansson - 2009 - Synthese 168 (3):423-432.
    Clear-cut cases of decision-making under risk (known probabilities) are unusual in real life. The gambler’s decisions at the roulette table are as close as we can get to this type of decision-making. In contrast, decision-making under uncertainty (unknown probabilities) can be exemplified by a decision whether to enter a jungle that may contain unknown dangers. Life is usually more like an expedition into an unknown jungle than a visit to the casino. Nevertheless, it is common in decision-supporting disciplines to proceed (...)
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  30.  11
    Disguised Plagiarism.Sven Ove Hansson - 2020 - Theoria 86 (6):695-703.
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  31.  46
    Changes in Preference.Sven Ove Hansson - 1995 - Theory and Decision 38 (1):1-28.
  32. The Harmful Influence of Decision Theory on Ethics.Sven Ove Hansson - 2010 - Ethical Theory and Moral Practice 13 (5):585-593.
    In the last half century, decision theory has had a deep influence on moral theory. Its impact has largely been beneficial. However, it has also given rise to some problems, two of which are discussed here. First, issues such as risk-taking and risk imposition have been left out of ethics since they are believed to belong to decision theory, and consequently the ethical aspects of these issues have not been treated in either discipline. Secondly, ethics has adopted the decision-theoretical idea (...)
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  33.  46
    A Survey of Non-Prioritized Belief Revision.Sven Ove Hansson - 1999 - Erkenntnis 50 (2-3):413-427.
    This paper summarizes and systematizes recent and ongoing work on non-prioritized belief change, i.e., belief revision in which the new information has no special priority due to its novelty.
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  34.  26
    Philosophical Expertise.Sven Ove Hansson - 2020 - Theoria 86 (2):139-144.
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  35.  28
    Preferences.Sven Ove Hansson & Till Grüne-Yanoff - 2008 - Stanford Encyclopedia of Philosophy.
  36.  50
    In Defense of Base Contraction.Sven Ove Hansson - 1992 - Synthese 91 (3):239 - 245.
    In the most common approaches to belief dynamics, states of belief are represented by sets that are closed under logical consequence. In an alternative approach, they are represented by non-closed belief bases. This representation has attractive properties not shared by closed representations. Most importantly, it can account for repeated belief changes that have not yet been satisfactorily accounted for in the closed approach.
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  37.  13
    Do Moral Philosophers Have to Be Moral?Sven Ove Hansson - 2020 - Theoria 86 (4):433-438.
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  38. Risk and Ethics : Three Approaches.Sven Ove Hansson - 2007 - In Tim Lewens (ed.), Risk: Philosophical Perspectives. Routledge.
     
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  39. Decision Theory.Sven Ove Hansson - unknown
    This text is a non-technical overview of modern decision theory. It is intended for university students with no previous acquaintance with the subject, and was primarily written for the participants of a course on risk analysis at Uppsala University in 1994.
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  40.  24
    The Role of Technology in Science: Philosophical Perspectives.Sven Ove Hansson (ed.) - 2015 - Springer Verlag.
    In the first part of this paper, I clear the ground from frequent misconceptions of the relationship between fact and value by examining some uses of the adjective “natural” in ethical controversies. Such uses bear evidence to our “natural” tendency to regard nature as the source of ethical norms. I then try to account for the origins of this tendency by offering three related explanations, the most important of which is evolutionistic: if any behaviour that favours our equilibrium with the (...)
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  41. Fallacies of Risk.Sven Ove Hansson - unknown
    discussions of risk contain logical and argumentative fallacies that are specific to the subject-matter. Ten such fallacies are identified, that can commonly be found in public debates on risk. They are named as follows: the sheer size fallacy, the converse sheer size fallacy, the fallacy of naturalness, the ostrich's fallacy, the proof-seeking fallacy, the delay fallacy, the technocratic fallacy, the consensus fallacy, the fallacy of pricing, and the infallability fallacy.
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  42.  51
    Local Change.Sven Ove Hansson & Renata Wassermann - 2002 - Studia Logica 70 (1):49 - 76.
    An agent can usually hold a very large number of beliefs. However, only a small part of these beliefs is used at a time. Efficient operations for belief change should affect the beliefs of the agent locally, that is, the changes should be performed only in the relevant part of the belief state. In this paper we define a local consequence operator that only considers the relevant part of a belief base. This operator is used to define local versions of (...)
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  43. Privacy at Work – Ethical Criteria.Anders J. Persson & Sven Ove Hansson - 2003 - Journal of Business Ethics 42 (1):59 - 70.
    New technologies and practices, such as drug testing, genetic testing, and electronic surveillance infringe upon the privacy of workers on workplaces. We argue that employees have a prima facie right to privacy, but this right can be overridden by competing moral principles that follow, explicitly or implicitly, from the contract of employment. We propose a set of criteria for when intrusions into an employee''s privacy are justified. Three types of justification are specified, namely those that refer to the employer''s interests, (...)
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  44.  57
    The Ethics of Enabling Technology.Sven Ove Hansson - 2007 - Cambridge Quarterly of Healthcare Ethics 16 (3):257-267.
    Healthcare depends increasingly on advanced medical technology. In addition, other forms of technology contribute to determine how our lives are influenced by disease and disability. The extent to which persons with impaired bodily functions are forced to live their lives differently than other people depends to a large part on a variety of technologies, from wheelchairs to computer interfaces, from hearing aids to garage doors. This wide-ranging influence of technology has important ethical aspects, but has seldom been discussed in bioethics, (...)
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  45.  8
    Who Should Be Author?Sven Ove Hansson - 2017 - Theoria 83 (2):99-102.
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  46.  99
    Philosophy and Other Disciplines.Sven Ove Hansson - 2008 - Metaphilosophy 39 (4-5):472-483.
    Abstract: This article offers a perspective on the role of philosophy in relation to other academic disciplines and to society in general. Among the issues treated are the delimitation of philosophy, whether it is a science, its role in the community of knowledge disciplines, its losses of subject matter to other disciplines, how it is influenced by social changes and by progress in other disciplines, and its role in interdisciplinary work. It is concluded that philosophy has an important mission in (...)
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  47.  61
    Providing Foundations for Coherentism.Sven Ove Hansson & Erik J. Olsson - 1999 - Erkenntnis 51 (2-3):243-265.
    We prove that four theses commonly associated with coherentism are incompatible with the representation of a belief state as a logically closed set of sentences. The result is applied to the conventional coherence interpretation of the AGM theory of belief revision, which appears not to be tenable. Our argument also counts against the coherentistic acceptability of a certain form of propositional holism. We argue that the problems arise as an effect of ignoring the distinction between derived and non-derived beliefs, and (...)
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  48.  9
    Social constructionism and climate science denial.Sven Ove Hansson - 2020 - European Journal for Philosophy of Science 10 (3):1-27.
    It has been much debated whether epistemic relativism in academia, for instance in the form of social constructivism, the strong programme, deconstructionism, and postmodernism, has paved the way for the recent upsurge in science denial, in particular climate science denial. In order to provide an empirical basis for this discussion, an extensive search of the social science literature was performed. It showed that in the 1990s, climate science was a popular target among academic epistemic relativists. In particular, many STS scholars (...)
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  49.  42
    The Ethics of Doing Philosophy.Sven Ove Hansson - 2015 - Theoria 81 (2):93-96.
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  50.  43
    Multiple and Iterated Contraction Reduced to Single-Step Single-Sentence Contraction.Sven Ove Hansson - 2010 - Synthese 173 (2):153-177.
    Multiple contraction (simultaneous contraction by several sentences) and iterated contraction are investigated in the framework of specified meet contraction (s.m.c.) that is extended for this purpose. Multiple contraction is axiomatized, and so is finitely multiple contraction (contraction by a finite set of sentences). Two ways to reduce finitely multiple contraction to contraction by single sentences are introduced. The reduced operations are axiomatically characterized and their properties are investigated. Furthermore, it is shown how iterated contraction can be reduced to single-step, single-sentence (...)
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