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Sven Ove Hansson [323]Sven Oven Hansson [1]
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Sven Ove Hansson
Royal Institute of Technology, Stockholm
  1. 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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  2. 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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  3. Ten Philosophical Problems in Belief Revision.Sven Ove Hansson - manuscript
    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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  4.  17
    Philosophical Expertise.Sven Ove Hansson - 2020 - Theoria 86 (2):139-144.
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  5. 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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  6. 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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  7. Konsten Att Vara Vetenskaplig.Sven Ove Hansson & I. I. I. Carmen - unknown
    Förord .................................................................................................... ............... 4 1 Vilken kunskap vill vi ha?................................................................................ 6..
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  8. 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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  9. Teknik Och Etik.Sven Ove Hansson - unknown
    Avdelningen för Filosofi, Institutionen för Filosofi och Teknikhistoria, KTH, Stockholm. Detta dokument får tills vidare fritt användas och kopieras.
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  10. 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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  11.  24
    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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  12. Att Publicera I Internationella Tidskrifter.Sven Ove Hansson - manuscript
    Som de första vetenskapliga tidskrifterna brukar man räkna den franska Journal des Sça- vants och den engelska Philosophical Transactions, som båda började ges ut år 1665. Redan under dessa tidskrifters första årtionden skaffade sig redaktörerna vanan att ta hjälp av experter inom olika områden med att granska manuskript. Detta system har sedan dess kommit att utvecklas och systematiseras, och kallas med en svåröversättlig engelsk term ”peer review”. Termen anger att manuskripten granskas av experter inom sitt specialområde. Dessa experter, som kallas (...)
     
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  13.  26
    Risk.Sven Ove Hansson - 2008 - Stanford Encyclopedia of Philosophy.
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  14.  95
    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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  15.  45
    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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  16.  36
    Logic of Belief Revision.Sven Ove Hansson - 2008 - Stanford Encyclopedia of Philosophy.
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  17. In Defense of the Ramsey Test.Sven Ove Hansson - 1992 - Journal of Philosophy 89 (10):522.
  18.  39
    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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  19.  66
    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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  20.  46
    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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  21. Är Nollvisionen Irrationell?Sven Ove Hansson - manuscript
    EKONOMEN: Nej, det vi alla borde enas om är i stället att göra en rationell avvägning mellan olika samhällsmål. Vi har i själva verket genomfört flera mycket avancerade forskningsprojekt inom det nya området contingent valuation of violence, CVV. På grundval av noggranna analyser har vi t ex konstaterat att en våldtäkt bör värderas som en kostnad av 1237000 kronor, räknat i penningvärdet den 1 juli 2001.
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  22.  79
    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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  23. The Dual Nature of Technological Concepts.Sven Ove Hansson - unknown
    Value statements can be divided into three major groups according to how their criteria of evaluation are specified. The first of these groups consists of those value statements that are unspecified with respect to the criteria of evaluation. Here is one example: Her decision was very good. The second group consists of the viewpoint-specified value statements. In these value statements, an explicit point of view is given, from which the evaluation is made. We often use adverbs such as “morally”, “aesthetically” (...)
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  24.  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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  25. Kan Moralfilosofin Hantera Riskproblemen?Sven Ove Hansson - manuscript
    Den moralfilosofiska traditionen har sina begränsningar. De frågor som stått i centrum för den moralfilosofiska diskussionen har ofta varit helt andra än de som människor i det praktiska livet har uppfattat som centrala moraliska problem. En viktig begränsning är att moralfilosofin, liksom beslutsteorin, nästan uteslutande har handlat om hur man hanterar välavgränsade problem där handlingsalternativen är givna. I det verkliga livet löser vi ofta moraliska problem genom att finna på nya handlingsalternativ, som inte fanns med från början.1 En annan begränsning (...)
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  26. 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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  27. 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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  28. 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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  29. Semantics for More Plausible Deontic Logics.Sven Ove Hansson - manuscript
    In 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 logics (...)
     
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  30.  62
    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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  31. Latinska Fraser Som Är Vanliga I Filosofiska Texter.Sven Ove Hansson - unknown
    Inom hakparentes anges den ordagranna betydelsen, när denna skiljer sig mycket från frasens gängse filosofiska innebörd. På tre- och fler-staviga ord har har ett accenttecken satts in före den betonade vokalen. (Tvåstaviga latinska ord har alltid betoningen på första stavelsen.).
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  32.  48
    Science Denial as a Form of Pseudoscience.Sven Ove Hansson - 2017 - Studies in History and Philosophy of Science Part A 63:39-47.
  33.  10
    Revising Probabilities and Full Beliefs.Sven Ove Hansson - forthcoming - Journal of Philosophical Logic:1-35.
    A new formal model of belief dynamics is proposed, in which the epistemic agent has both probabilistic beliefs and full beliefs. The agent has full belief in a proposition if and only if she considers the probability that it is false to be so close to zero that she chooses to disregard that probability. She treats such a proposition as having the probability 1, but, importantly, she is still willing and able to revise that probability assignment if she receives information (...)
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  34.  99
    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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  35.  2
    Descriptor Revision.Sven Ove Hansson - 2017 - Springer Verlag.
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  36. The Structure of Values and Norms.Sven Ove Hansson - 2002 - Bulletin of Symbolic Logic 8 (4):531-533.
     
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  37.  11
    Anonymous Philosophical Communication.Sven Ove Hansson - 2018 - Theoria 84 (2):113-119.
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  38. Decision Making Under Great Uncertainty.Hansson Sven Ove - 1996 - Philosophy of the Social Sciences 26 (3):369-386.
    This article is an attempt at a systematic account of decision making under greater uncertainty than what traditional, mathematically oriented decision theory can cope with. Four components of great uncertainty are distinguished: (1) the identity of the options is not well determined (uncertainty of demarcation) ; (2) the consequences of at least some option are unknown (uncertainty of consequences); (3) it is not clear whether information obtained from others, such as experts, can be relied on (uncertainty of reliance); and (4) (...)
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  39.  47
    Great Uncertainty About Small Things.Sven Ove Hansson - 2004 - Techne 8 (2):26-35.
  40.  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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  41.  23
    Preferences.Sven Ove Hansson & Till Grüne-Yanoff - 2008 - Stanford Encyclopedia of Philosophy.
  42.  91
    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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  43.  17
    Philosophical Plagiarism Under the Spotlight.Sven Ove Hansson - 2019 - Theoria 85 (2):61-68.
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  44.  46
    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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  45. 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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  46.  92
    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. The False Dichotomy Between Coherentism and Foundationalism.Sven Ove Hansson - 2007 - Journal of Philosophy 104 (6):290-300.
  48. 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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  49. Risk and Ethics : Three Approaches.Sven Ove Hansson - 2007 - In Tim Lewens (ed.), Risk: Philosophical Perspectives. Routledge.
     
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  50.  55
    Do We Need a Special Ethics for Research?Sven Ove Hansson - 2011 - Science and Engineering Ethics 17 (1):21-29.
    Research is subject to more stringent ethical requirements than most other human activities, and a procedure that is otherwise allowed may be forbidden in research. Hence, risk-taking is more restricted in scientific research than in most non-research contexts, and privacy is better protected in scientific questionnaires than in marketing surveys. Potential arguments for this difference are scrutinized. The case in its favour appears to be weak. A stronger case can be made in favour of a difference in the opposite direction: (...)
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