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Hans Rott
Universität Regensburg
  1.  85
    Change, Choice and Inference: A Study of Belief Revision and Nonmonotonic Reasoning.Hans Rott - 2001 - Oxford University Press.
    Change, Choice and Inference develops logical theories that are necessary both for the understanding of adaptable human reasoning and for the design of intelligent systems. The book shows that reasoning processes - the drawing on inferences and changing one's beliefs - can be viewed as belonging to the realm of practical reason by embedding logical theories into the broader context of the theory of rational choice. The book unifies lively and significant strands of research in logic, philosophy, economics and artificial (...)
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  2.  7
    Unstable Knowledge, Unstable Belief.Hans Rott - 2019 - Logos and Episteme 10 (4):395-407.
    An idea going back to Plato’s Meno is that knowledge is stable. Recently, a seemingly stronger and more exciting thesis has been advanced, namely that rational belief is stable. I sketch two stability theories of knowledge and rational belief, and present an example intended to show that knowledge need not be stable and rational belief need not be stable either. The second claim does not follow from the first, even if we take knowledge to be a special kind of rational (...)
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  3.  33
    "If Oswald Had Not Killed Kennedy" – Spohn on Counterfactuals.Hans Rott - 2016 - In Wolfgang Freitag, Hans Rott, Holger Sturm & Alexandra Zinke (eds.), Von Rang und Namen. Philosophical Essays in Honour of Wolfgang Spohn. Münster, Germany: Mentis. pp. 379–399.
    Wolfgang Spohn's theory of ranking functions is an elegant and powerful theory of the structure and dynamics of doxastic states. In two recent papers, Spohn has applied it to the analysis of conditionals, claiming to have presented a unified account of indicative and subjunctive (counterfactual) conditionals. I argue that his analysis fails to account for counterfactuals that refer to indirect causes. The strategy of taking the transitive closure that Spohn employs in the theory of causation is not available for counterfactuals. (...)
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  4. Change, Choice and Inference. A Study of Belief Revision and Nonmonotonic Reasoning.Hans Rott - 2001 - Studia Logica 77 (1):145-147.
     
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  5. Belief Revision.Hans Rott - 1995 - In Jonathan Eric Adler & Lance J. Rips (eds.), Reasoning: Studies of Human Inference and its Foundations. Cambridge University Press. pp. 514--534.
    This is a survey paper. Contents: 1 Introduction -- 2 The representation of belief -- 3 Kinds of belief change -- 4 Coherence constraints for belief revision -- 5 Different modes of belief change -- 6 Two strategies for characterizing rational changes of belief - 6.1 The postulates strategy - 6.2 The constructive strategy -- 7 An abstract view of the elements of belief change -- 8 Iterated changes of belief -- 9 Further developments - 9.1 Variants and extensions of (...)
     
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  6. From Probabilities to Categorical Beliefs: Going Beyond Toy Models.Igor Douven & Hans Rott - 2018 - Journal of Logic and Computation 28 (6):1099-1124.
    According to the Lockean thesis, a proposition is believed just in case it is highly probable. While this thesis enjoys strong intuitive support, it is known to conflict with seemingly plausible logical constraints on our beliefs. One way out of this conflict is to make probability 1 a requirement for belief, but most have rejected this option for entailing what they see as an untenable skepticism. Recently, two new solutions to the conflict have been proposed that are alleged to be (...)
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  7. Two Dogmas of Belief Revision.Hans Rott - 2000 - Journal of Philosophy 97 (9):503-522.
    The paper attacks the almost universally held view that belief revison theories, as they have been studied in the literature of the past two decades, are founded on a Principle of Minimal Change, or Principle of Informational Economy. The principle comes in two versions. According to the first, an agent should, when accepting new information, aim at a posterior belief set that minimizes the items on which it disagrees with the prior belief set. If there are different ways to effect (...)
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  8.  9
    Difference-Making Conditionals and the Relevant Ramsey Test.Hans Rott - forthcoming - Review of Symbolic Logic:1-39.
    This paper explores conditionals expressing that the antecedent makes a difference for the consequent. A 'relevantised' version of the Ramsey Test for conditionals is employed in the context of the classical theory of belief revision. The idea of this test is that the antecedent is relevant to the consequent in the following sense: a conditional is accepted just in case (i) the consequent is accepted if the belief state is revised by the antecedent and (ii) the consequent fails to be (...)
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  9.  58
    Severe Withdrawal (and Recovery).Hans Rott & Maurice Pagnucco - 1999 - Journal of Philosophical Logic 28 (5):501-547.
    The problem of how to remove information from an agent's stock of beliefs is of paramount concern in the belief change literature. An inquiring agent may remove beliefs for a variety of reasons: a belief may be called into doubt or the agent may simply wish to entertain other possibilities. In the prominent AGM framework for belief change, upon which the work here is based, one of the three central operations, contraction, addresses this concern (the other two deal with the (...)
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  10.  15
    Shifting Priorities: Simple Representations for Twenty-Seven Iterated Theory Change Operators.Hans Rott - 2006 - In David Makinson, Jacek Malinowski & Heinrich Wansing (eds.), Towards Mathematical Philosophy. Dordrecht: Springer. pp. 269–296.
    Prioritized bases, i.e., weakly ordered sets of sentences, have been used for specifying an agent’s ‘basic’ or ‘explicit’ beliefs, or alternatively for compactly encoding an agent’s belief state without the claim that the elements of a base are in any sense basic. This paper focuses on the second interpretation and shows how a shifting of priorities in prioritized bases can be used for a simple, constructive and intuitive way of representing a large variety of methods for the change of belief (...)
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  11.  34
    Stability and Scepticism in the Modelling of Doxastic States: Probabilities and Plain Beliefs.Hans Rott - 2017 - Minds and Machines 27 (1):167-197.
    There are two prominent ways of formally modelling human belief. One is in terms of plain beliefs, i.e., sets of propositions. The second one is in terms of degrees of beliefs, which are commonly taken to be representable by subjective probability functions. In relating these two ways of modelling human belief, the most natural idea is a thesis frequently attributed to John Locke: a proposition is or ought to be believed just in case its subjective probability exceeds a contextually fixed (...)
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  12.  44
    Preferential Belief Change Using Generalized Epistemic Entrenchment.Hans Rott - 1992 - Journal of Logic, Language and Information 1 (1):45-78.
    A sentence A is epistemically less entrenched in a belief state K than a sentence B if and only if a person in belief state K who is forced to give up either A or B will give up A and hold on to B. This is the fundamental idea of epistemic entrenchment as introduced by Gärdenfors (1988) and elaborated by Gärdenfors and Makinson (1988). Another distinguishing feature of relations of epistemic entrenchment is that they permit particularly simple and elegant (...)
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  13.  16
    Two Dogmas of Belief Revision.Hans Rott - 2000 - Journal of Philosophy 97 (9):503.
    The paper attacks the widely held view that belief revision theories, as they have been studied in the past two decades, are founded on the Principle of Informational Economy. The principle comes in two versions. According to the first, an agent should, when accepting a new piece of information, aim at a minimal change of his previously held beliefs. If there are different ways to effect the belief change, then the agent should, according to he second version, give up those (...)
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  14.  53
    Two Methods of Constructing Contractions and Revisions of Knowledge Systems.Hans Rott - 1991 - Journal of Philosophical Logic 20 (2):149 - 173.
    This paper investigates the formal relationship between two prominent approaches to the logic of belief change. The first one uses the idea of "relational partial meet contractions" as developed by Alchourrón, Gärdenfors and Makinson (Journal of Symbolic Logic 1985), the second one uses the concept of "epistemic entrenchment" as elaborated by Gärdenfors and Makinson (in Theoretical Aspects of Reasoning about Knowledge, M. Y. Vardi, Los Altos 1988). The two approaches are shown to be strictly equivalent via direct links between the (...)
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  15.  48
    Belief Contraction in the Context of the General Theory of Rational Choice.Hans Rott - 1993 - Journal of Symbolic Logic 59 (4):1426-1450.
    This paper reorganizes and further develops the theory of partial meet contraction which was introduced in a classic paper by Alchourron, Gardenfors, and Makinson. Our purpose is threefold. First, we put the theory in a broader perspective by decomposing it into two layers which can respectively be treated by the general theory of choice and preference and elementary model theory. Second, we reprove the two main representation theorems of AGM and present two more representation results for the finite case that (...)
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  16. A Counterexample to Six Fundamental Principles of Belief Formation.Hans Rott - 2004 - Synthese 139 (2):225 - 240.
    In recent years there has been a growing consensus that ordinary reasoning does not conform to the laws of classical logic, but is rather nonmonotonic in the sense that conclusions previously drawn may well be removed upon acquiring further information. Even so, rational belief formation has up to now been modelled as conforming to some fundamental principles that are classically valid. The counterexample described in this paper suggests that a number of the most cherished of these principles should not be (...)
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  17.  57
    Basic Entrenchment.Hans Rott - 2003 - Studia Logica 73 (2):257-280.
    In contrast to other prominent models of belief change, models based on epistemic entrenchment have up to now been applicable only in the context of very strong packages of requirements for belief revision. This paper decomposes the axiomatization of entrenchment into independent modules. Among other things it is shown how belief revision satisfying only the 'basic' postulates of Alchourrón, Gärdenfors and Makinson can be represented in terms of entrenchment.
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  18.  99
    Conditionals and Theory Change: Revisions, Expansions, and Additions.Hans Rott - 1989 - Synthese 81 (1):91-113.
    This paper dwells upon formal models of changes of beliefs, or theories, which are expressed in languages containing a binary conditional connective. After defining the basic concept of a (non-trivial) belief revision model. I present a simple proof of Gärdenfors''s (1986) triviality theorem. I claim that on a proper understanding of this theorem we must give up the thesis that consistent revisions (additions) are to be equated with logical expansions. If negated or might conditionals are interpreted on the basis of (...)
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  19.  55
    Reapproaching Ramsey: Conditionals and Iterated Belief Change in the Spirit of AGM.Hans Rott - 2011 - Journal of Philosophical Logic 40 (2):155-191.
    According to the Ramsey Test, conditionals reflect changes of beliefs: α > β is accepted in a belief state iff β is accepted in the minimal revision of it that is necessary to accommodate α. Since Gärdenfors’s seminal paper of 1986, a series of impossibility theorems (“triviality theorems”) has seemed to show that the Ramsey test is not a viable analysis of conditionals if it is combined with AGM-type belief revision models. I argue that it is possible to endorse that (...)
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  20.  31
    Degrees All the Way Down: Beliefs, Non-Beliefs and Disbeliefs.Hans Rott - 2009 - In Franz Huber & Christoph Schmidt-Petri (eds.), Degrees of Belief. Springer. pp. 301--339.
    This paper combines various structures representing degrees of belief, degrees of disbelief, and degrees of non-belief (degrees of expectations) into a unified whole. The representation uses relations of comparative necessity and possibility, as well as non-probabilistic functions assigning numerical values of necessity and possibility. We define all-encompassing necessity structures which have weak expectations (mere hypotheses, guesses, conjectures, etc.) occupying the lowest ranks and very strong, ineradicable ('a priori') beliefs occupying the highest ranks. Structurally, there are no differences from the top (...)
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  21.  64
    Coherence and Conservatism in the Dynamics of Belief Part I: Finding the Right Framework.Hans Rott - 1999 - Erkenntnis 50 (2-3):387-412.
    In this paper I discuss the foundations of a formal theory of coherent and conservative belief change that is suitable to be used as a method for constructing iterated changes of belief, sensitive to the history of earlier belief changes, and independent of any form of dispositional coherence. I review various ways to conceive the relationship between the beliefs actually held by an agent and her belief change strategies, show the problems they suffer from, and suggest that belief states should (...)
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  22.  40
    Ifs, Though, and Because.Hans Rott - 1986 - Erkenntnis 25 (3):345-370.
    The paper proposes a unified analysis of the natural language connectives 'if', 'if … might', 'even if' (all of them with indicative and subjunctive mood), 'because' and 'though'. They are all interpreted as instances of universal (pro)conditionals, unconditionals, or counterconditionals. The paper imports the notion of relevance into the meaning of conditionals, viewing conditionals as close in meaning to explanations and statements about causal relations. The antecedent of a conditional is interpreted as being relevant for its consequent, thus avoiding the (...)
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  23. Revision by Comparison.Eduardo Fermé & Hans Rott - 2004 - Artificial Intelligence 157 (1):5-47.
    Since the early 1980s, logical theories of belief revision have offered formal methods for the transformation of knowledge bases or “corpora” of data and beliefs. Early models have dealt with unconditional acceptance and integration of potentially belief-contravening pieces of information into the existing corpus. More recently, models of “non-prioritized” revision were proposed that allow the agent rationally to refuse to accept the new information. This paper introduces a refined method for changing beliefs by specifying constraints on the relative plausibility of (...)
     
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  24.  92
    A Puzzle About Disputes and Disagreements.Hans Rott - 2015 - Erkenntnis 80 (1):167–189.
    The paper addresses the situation of a dispute in which one speaker says ϕ and a second speaker says not-ϕ. Proceeding on an idealising distinction between "basic" and "interesting" claims that may be formulated in a given idiolectal language, I investigate how it might be sorted out whether the dispute reflects a genuine disagreement, or whether the speakers are only having a merely verbal dispute, due to their using different interesting concepts. I show that four individually plausible principles for the (...)
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  25.  55
    Preservation and Postulation: Lessons From the New Debate on the Ramsey Test.Hans Rott - 2017 - Mind 126 (502):609–626.
    Richard Bradley has initiated a new debate, with Brian Hill and Jake Chandler as further participants, about the implications of a number of so-called triviality results surrounding the Ramsey test for conditionals. I comment on this debate and argue that ‘Inclusion’ and ‘Preservation’, which were originally introduced as postulates for the rational revision of factual beliefs, have little to recommend them in the first place when extended to languages containing conditionals. I question the philosophical method of postulation that was applied (...)
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  26.  80
    Stability, Strength and Sensitivity: Converting Belief Into Knowledge.Hans Rott - 2004 - Erkenntnis 61 (2-3):469-493.
    In this paper I discuss the relation between various properties that have been regarded as important for determining whether or not a belief constitutes a piece of knowledge: its stability, strength and sensitivity to truth, as well as the strength of the epistemic position in which the subject is with respect to this belief. Attempts to explicate the relevant concepts more formally with the help of systems of spheres of possible worlds (à la Lewis and Grove) must take care to (...)
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  27.  19
    Probability, Coherent Belief and Coherent Belief Changes.John Cantwell & Hans Rott - 2019 - Annals of Mathematics and Artificial Intelligence 87 (3):259-291.
    This paper is about the statics and dynamics of belief states that are represented by pairs consisting of an agent's credences (represented by a subjective probability measure) and her categorical beliefs (represented by a set of possible worlds). Regarding the static side, we argue that the latter proposition should be coherent with respect to the probability measure and that its probability should reach a certain threshold value. On the dynamic side, we advocate Jeffrey conditionalisation as the principal mode of changing (...)
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  28.  26
    Coherence and Conservatism in the Dynamics of Belief. Part II: Iterated Belief Change Without Dispositional Coherence.Hans Rott - 2003 - Journal of Logic and Computation 13 (1):111-145.
    This paper studies the idea of conservatism with respect to belief change strategies in the setting of unary, iterated belief revision functions (based on the conclusions of Rott, ‘Coherence and Conservatism in the Dynamics of Belief, Part I: Finding the Right Framework’, Erkenntnis 50, 1999, 387–412). Special attention is paid to the case of ‘basic belief change’ where neither the (weak) AGM postulates concerning conservatism with respect to beliefs nor the (stong) supplementary AGM postulates concerning dispositional coherence need to be (...)
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  29.  70
    Modellings for Belief Change: Prioritization and Entrenchment.Hans Rott - 1992 - Theoria 58 (1):21-57.
    We distinguish the set of explicit beliefs of a reasoner, his "belief base", from the beliefs that are merely implicit. Syntax-based belief change governed by the structure of the belief base and the ranking ("prioritization") of its elements is reconstructed with the help of an epistemic entrenchment relation in the style of Gärdenfors and Makinson. Though priorities are essentially different from entrenchments, distinguished relations of epistemic entrenchment may be obtained from prioritized belief bases by a number of different constructions. An (...)
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  30. Interpreting Enthymematic Arguments Using Belief Revision.Georg Brun & Hans Rott - 2013 - Synthese 190 (18):4041-4063.
    This paper is about the situation in which an author (writer or speaker) presents a deductively invalid argument, but the addressee aims at a charitable interpretation and has reason to assume that the author intends to present a valid argument. How can he go about interpreting the author’s reasoning as enthymematically valid? We suggest replacing the usual find-the-missing-premise approaches by an approach based on systematic efforts to ascribe a belief state to the author against the background of which the argument (...)
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  31.  31
    The Value of Truth and the Value of Information : On Isaac Levi's Epistemology.Hans Rott - 2006 - In Erik J. Olsson (ed.), Knowledge and Inquiry: Essays on the Pragmatism of Isaac Levi. Cambridge University Press. pp. 179.
    The paper aims at a perspicuous representation of Isaac Levi's pragmatist epistemology, spanning from the 1967 classic "Gambling with Truth" to his 2004 book on "Mild Contraction". Based on a formal framework for Levi's notion of inquiry, I analyse his decision-theoretic approach with truth and information as basic cognitive values, and with Shackle measures as emerging structures. Both cognitive values figure prominently in Levi's model of inductive belief expansion, but only the value of information is employed in his model of (...)
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  32.  32
    Two Concepts of Plausibility in Default Reasoning.Hans Rott - 2014 - Erkenntnis 79 (S6):1219–1252.
    In their unifying theory to model uncertainty, Friedman and Halpern (1995–2003) applied plausibility measures to default reasoning satisfying certain sets of axioms. They proposed a distinctive condition for plausibility measures that characterizes “qualitative” reasoning (as contrasted with probabilistic reasoning). A similar and similarly fundamental, but more general and thus stronger condition was independently suggested in the context of “basic” entrenchment-based belief revision by Rott (1996–2003). The present paper analyzes the relation between the two approaches to formalizing basic notions of plausibility (...)
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  33.  42
    A Nonmonotonic Conditional Logic for Belief Revision.Hans Rott - 1991 - In André Fuhrmann & Michael Morreau (eds.), The Logic of Theory Change. Berlin: Springer. pp. 135–181.
    Using Gärdenfors's notion of epistemic entrenchment, we develop the semantics of a logic which accounts for the following points. It explains why we may generally infer `If ~A then B´ if all we know is AvB while must not generally infer `If ~A then B´ if all we know is {AvB, A}. More generally, it explains the nonmonotonic nature of the consequence relation governing languages which contain conditionals, and it explains how we can deduce conditionals from premise sets without conditionals. (...)
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  34.  41
    Bounded Revision: Two-Dimensional Belief Change Between Conservative and Moderate Revision.Hans Rott - 2012 - Journal of Philosophical Logic 41 (1):173-200.
    This paper presents the model of ‘bounded revision’ that is based on two-dimensional revision functions taking as arguments pairs consisting of an input sentence and a reference sentence. The key idea is that the input sentence is accepted as far as (and just a little further than) the reference sentence is ‘cotenable’ with it. Bounded revision satisfies the AGM axioms as well as the Same Beliefs Condition (SBC) saying that the set of beliefs accepted after the revision does not depend (...)
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  35.  95
    Negative Doxastic Voluntarism and the Concept of Belief.Hans Rott - 2017 - Synthese 194 (8):2695–2720.
    Pragmatists have argued that doxastic or epistemic norms do not apply to beliefs, but to changes of beliefs; thus not to the holding or not-holding, but to the acquisition or removal of beliefs. Doxastic voluntarism generally claims that humans acquire beliefs in a deliberate and controlled way. This paper introduces Negative Doxastic Voluntarism according to which there is a fundamental asymmetry in belief change: humans tend to acquire beliefs more or less automatically and unreflectively, but they tend to withdraw beliefs (...)
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  36.  66
    How Not to Change the Theory of Theory Change: A Reply to Tennant.Sven Ove Hansson & Hans Rott - 1995 - British Journal for the Philosophy of Science 46 (3):361-380.
    A number of seminal papers on the logic of belief change by Alchourrön, Gärden-fors, and Makinson have given rise to what is now known as the AGM paradigm. The present discussion note is a response to Neil Tennant's [1994], which aims at a critical appraisal of the AGM approach and the introduction of an alternative approach. We show that important parts of Tennants's critical remarks are based on misunderstandings or on lack of information. In the course of doing this, we (...)
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  37. A Theoria Round Table on Philosophy Publishing.Bengt Hansson, Hans van Ditmarsch, Pascal Engel, Sven Ove Hansson, Vincent Hendricks, Søren Holm, Pauline Jacobson, Anthonie Meijers, Henry S. Richardson & Hans Rott - 2011 - Theoria 77 (2):104-116.
    As part of the conference commemorating Theoria's 75th anniversary, a round table discussion on philosophy publishing was held in Bergendal, Sollentuna, Sweden, on 1 October 2010. Bengt Hansson was the chair, and the other participants were eight editors-in-chief of philosophy journals: Hans van Ditmarsch (Journal of Philosophical Logic), Pascal Engel (Dialectica), Sven Ove Hansson (Theoria), Vincent Hendricks (Synthese), Søren Holm (Journal of Medical Ethics), Pauline Jacobson (Linguistics and Philosophy), Anthonie Meijers (Philosophical Explorations), Henry S. Richardson (Ethics) and Hans Rott (Erkenntnis).
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  38. Reduktion und Revision: Aspekte des nichtmonotonen Theorienwandels.Hans Rott - 1991 - Frankfurt, Germany: Peter Lang.
    The development of science does not proceed as a monotonous addition of information. A superior successor theory often contradicts its predecessor. The question as to what the logical relationship is between such theories, insofar as the transition from one to the other embodies continuity and progress, is the subject of this book. Proceeding from a discussion of intertheory reductions, the author proves that theories revision models from philosophical logic are fruitful for questions of scientific theory. Formal analyses of conditionals, autoepistemic (...)
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  39.  19
    Safe Contraction Revisited.Hans Rott & Sven Ove Hansson - 2014 - In Sven Ove Hansson (ed.), David Makinson on Classical Methods for Non-Classical Problems (Outstanding Contributions to Logic, Vol. 3). Dordrecht: Springer. pp. 35–70.
    Modern belief revision theory is based to a large extent on partial meet contraction that was introduced in the seminal article by Carlos Alchourrón, Peter Gärdenfors, and David Makinson that appeared in 1985. In the same year, Alchourrón and Makinson published a significantly different approach to the same problem, called safe contraction. Since then, safe contraction has received much less attention than partial meet contraction. The present paper summarizes the current state of knowledge on safe contraction, provides some new results (...)
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  40.  43
    Reduction: Some Criteria and Criticisms of the Structuralist Concept.Hans Rott - 1987 - Erkenntnis 27 (2):231 - 256.
    Inter-theoretical reduction has always been a major topic in the structuralist philosophy of science. This paper reviews criteria of adequacy which were put forward by Adams, Sneed, Stegmuller, Mayr, Pearce, Kamlah, and Mormann. The criteria are formalized in a simplified structuralist model, and the logical relations between them are investigated. It turns out that various parts of these criteria are incompatible.
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  41.  7
    Unvergleichbarkeit und unabhängige Bedeutung.Hans Rott - 2014 - Zeitschrift für Philosophische Forschung 68 (2):237–241.
    This is a short discussion review of Wolfgang Spohn, The Laws of Belief, Oxford UP 2012. I argue, first, that it is important to account for incomparabilities in the plausibilities of possible worlds or propositions, and second, that the meaning of input parameters specifying the degree to which a proposition is to be accepted should be independent of the agent's belief state.
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  42.  68
    A New Psychologism in Logic? Reflections From the Point of View of Belief Revision.Hans Rott - 2008 - Studia Logica 88 (1):113-136.
    This paper addresses the question whether the past couple of decades of formal research in belief revision offers evidence of a new psychologism in logic. In the first part I examine five potential arguments in favour of this thesis and find them all wanting. In the second part of the paper I argue that belief revision research has climbed up a hierarchy of models for the change of doxastic states that appear to be clearly normative at the bottom, but are (...)
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  43. Information Structures in Belief Revision.Hans Rott - 2008 - In Johan Van Benthem & Pieter Adriaans (eds.), Philosophy of Information, Vol. 8 of the Handbook of the Philosophy of Science. Amsterdam: Elsevier. pp. 457–482.
    This is a survey paper. Contents: 1 Introduction ― 2 Preliminary remarks on information, truth and mind - 2.1 Remarks on information and truth - 2.2 Some clues from the philosophy of mind - 2.3 Functionalism as applied to belief revision - 2.4 Filling in the parameters ― 3 Belief change = revision + reflection - 3.1 Foundationalism - 3.2 Coherentism ― 4 Inference operations for simple change operations: three examples - 4.1 Example 1: flat data bases - 4.2 Example (...)
     
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  44.  3
    Lehrer's Dynamic Theory of Knowledge.Hans Rott - 2003 - In Olsson Erik (ed.), The Epistemology of Keith Lehrer. Kluwer Academic Publishers. pp. 219--242.
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  45.  10
    Special Issue on Formal Models of Belief Change in Rational Agents.Giacomo Bonanno, James Delgrande, Jérôme Lang & Hans Rott - 2009 - Journal of Applied Logic 7 (4):363.
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  46.  54
    Odd Choices: On the Rationality of Some Alleged Anomalies of Decision and Inference.Hans Rott - 2011 - Topoi 30 (1):59-69.
    This paper presents a number of apparent anomalies in rational choice scenarios, and their translation into the logic of everyday reasoning. Three classes of examples that have been discussed in the context of probabilistic choice since the 1960s (by Debreu, Tversky and others) are analyzed in a non-probabilistic setting. It is shown how they can at the same time be regarded as logical problems that concern the drawing of defeasible inferences from a given information base. I argue that initial appearances (...)
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  47.  33
    Four Floors for the Theory of Theory Change: The Case of Imperfect Discrimination.Hans Rott - 2014 - In Eduardo Fermé & João Leite (eds.), Logics in Artificial Intelligence: 13th European Conference (JELIA 2014). Cham: Springer. pp. 368–382.
    The classical qualitative theory of belief change due to Alchourrón, Gärdenfors and Makinson has been widely known as being characterised by two packages of postulates. While the basic package consists of six postulates and is very weak, the full package that adds two further postulates is very strong. I revisit two classic constructions of theory contraction, viz., relational possible worlds contraction and entrenchment-based contraction and argue that four intermediate levels can be distinguished that play - or ought to play - (...)
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  48.  26
    Three Floors for the Theory of Theory Change.Hans Rott - 2014 - In Vít Punčochář & Michal Dančák (eds.), The Logica Yearbook 2013. London: College Publications. pp. 187–205.
    The theory of theory change due to Alchourrón, Gärdenfors and Makinson ("AGM") has been widely known as being characterized by two sets of postulates, one being very weak and the other being very strong. Commenting on the three classic constructions of partial meet contraction, safe contraction and entrenchment-based construction, I argue that three intermediate levels can be distinguished that play decisive roles within the AGM theory.
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  49.  8
    Theoretical Concepts in Flux: Conceptual Knowledge and Theory Change.Hans Rott - 2003 - In Regine Eckardt, Klaus von Heusinger & Christoph Schwarze (eds.), Words in Time: Diachronic Semantics From Different Points of View. Mouton de Gruyter. pp. 143-175.
    A theoretical term gets its meaning from a set of meaning-constitutive or 'analytic' sentences of the relevant theory. The meanings of theoretical terms may change when the theories change. After a discussion of Kant and Frege, I propose a broadly Quinean view of analyticity, without adopting Quine's meaning skepticism. A sentence of a given theory in a certain language is called analytic if revising the theory so that this sentence is lost entails the abandonment of the given linguistic (alternatively, of (...)
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  50.  49
    Guest Editors' Introduction.Giacomo Bonanno, James Delgrande & Hans Rott - 2012 - Journal of Philosophical Logic 41 (1):1-5.
    The contributions to the Special Issue on Multiple Belief Change, Iterated Belief Change and Preference Aggregation are divided into three parts. Four contributions are grouped under the heading "multiple belief change" (Part I, with authors M. Falappa, E. Fermé, G. Kern-Isberner, P. Peppas, M. Reis, and G. Simari), five contributions under the heading "iterated belief change" (Part II, with authors G. Bonanno, S.O. Hansson, A. Nayak, M. Orgun, R. Ramachandran, H. Rott, and E. Weydert). These papers do not only pick (...)
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