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  1. Marie Duží & Bjørn Jespersen (forthcoming). Transparent Quantification Into Hyperintensional Objectual Attitudes. Synthese:1-43.
    We demonstrate how to validly quantify into hyperintensional contexts involving non-propositional attitudes like seeking, solving, calculating, worshipping, and wanting to become. We describe and apply a typed extensional logic of hyperintensions that preserves compositionality of meaning, referential transparency and substitutivity of identicals also in hyperintensional attitude contexts. We specify and prove rules for quantifying into hyperintensional contexts. These rules presuppose a rigorous method for substituting variables into hyperintensional contexts, and the method will be described. We prove the following. First, it (...)
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  2. Bjørn Jespersen & Marie Duží (forthcoming). Introduction. Synthese:1-10.
    The topic of this special issue of Synthese is hyperintensionality. This introduction offers a brief survey of the very notion of hyperintensionality followed by a summary of each of the papers in this collection. The papers are foundational studies of hyperintensionality accompanied by ample philosophical applications.Hyperintensionality concerns the individuation of non-extensional entities such as propositions and properties, relations-in-intension and individual roles, as well as, for instance, proofs and judgments and computational procedures, in case these do not reduce to any of (...)
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  3. Bjørn Jespersen (2015). Structured Lexical Concepts, Property Modifiers, and Transparent Intensional Logic. Philosophical Studies 172 (2):321-345.
    In a 2010 paper Daley argues, contra Fodor, that several syntactically simple predicates express structured concepts. Daley develops his theory of structured concepts within Tichý’s Transparent Intensional Logic . I rectify various misconceptions of Daley’s concerning TIL. I then develop within TIL an improved theory of how structured concepts are structured and how syntactically simple predicates are related to structured concepts.
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  4. Bjørn Jespersen & Massimiliano Carrara (2013). A New Logic of Technical Malfunction. Studia Logica 101 (3):547-581.
    Aim of the paper is to present a new logic of technical malfunction. The need for this logic is motivated by a simple-sounding philosophical question: Is a malfunctioning corkscrew, which fails to uncork bottles, nonetheless a corkscrew? Or in general terms, is a malfunctioning F, which fails to do what Fs do, nonetheless an F? We argue that ‘malfunctioning’ denotes the modifier Malfunctioning rather than a property, and that the answer depends on whether Malfunctioning is subsective or privative. If subsective, (...)
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  5. Bjørn Jespersen (2012). Detail príspevku/publikácie. Organon F: Filozoficky Casopis 19 (1):58-65.
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  6. Bjørn Jespersen (2012). Post-Fregean Thoughts on Propositional Unity. In James Maclaurin (ed.), Rationis Defensor.
    This note sketches how a theory of procedural semantics may offer a solution to the problem of the unity of the proposition. The current revival of the notion of structured meaning has made the problem of propositional unity pressing. The problem, stated in its simplest form, is how an individual a and a property F combine into the proposition P that a is an F; i.e. how two different kinds of objects combine into a third kind of object capable of (...)
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  7. Bjørn Jespersen (2012). Recent Work on Structured Meaning and Propositional Unity. Philosophy Compass 7 (9):620-630.
    Logical semantics includes once again structured meanings in its repertoire. The leading idea is that semantic and syntactic structure are more or less isomorphic. A key motive for reintroducing sensitivity to semantic structure is to obtain fine‐grained meanings, which are individuated more finely than in possible‐world semantics, namely up to necessary equivalence. Just getting the truth‐conditions right is deemed insufficient for a full semantic analysis of sentences. This paper surveys some of the most recent contributions to the program of structured (...)
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  8. Bjørn Jespersen (2012). Teaching & Learning Guide For:Recent Work on Structured Meaning and Propositional Unity. Philosophy Compass 7 (12):943-945.
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  9. Bjørn Jespersen (2012). The Non-Italian Pope1. Organon F 19 (1):58-65.
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  10. Bjørn Jespersen (2011). An Intensional Solution to the Bike Puzzle of Intentional Identity. Philosophia 39 (2):297-307.
    In a 2005 paper Ólafur Páll Jónsson presents a puzzle that turns on intentional identity and definite descriptions. He considers eight solutions and rejects them all, thus leaving the puzzle unsolved. In this paper I put forward a solution. The puzzle is this. Little Lotta wants most of all a bicycle for her birthday, but she gets none. Distracted by the gifts she does receive, she at first does not think about the bike. But when seeing her tricycle, she is (...)
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  11. Bjørn Jespersen (2011). Traditionally, I Am Entitled to a Last Meal. Organon F 18 (1):5-13.
    Nunberg maintains that there are cases like “I am traditionally entitled to a last meal”, as uttered by a condemned prisoner facing the firing squad, which suggest that an indexical like ‘I’ does double duty as a vehicle of singular and general reference. I argue against this claim. My position is that the sentence should be factored out into two: “Traditionally, a condemned prisoner is entitled to a last meal” and “I am a condemned prisoner”. Nunberg’s sentence is generated by (...)
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  12. Bjørn Jespersen & Massimiliano Carrara (2011). Two Conceptions of Technical Malfunction. Theoria 77 (2):117-138.
    The topic of this paper is the notion of technical (as opposed to biological) malfunction. It is shown how to form the property being a malfunctioning F from the property F and the property modifier malfunctioning (a mapping taking a property to a property). We present two interpretations of malfunctioning. Both interpretations agree that a malfunctioning F lacks the dispositional property of functioning as an F. However, its subsective interpretation entails that malfunctioning Fs are Fs, whereas its privative interpretation entails (...)
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  13. Bjørn Jespersen (2010). Hyperintensions and Procedural Isomorphism: Alternative (½). In Tadeusz Czarnecki, Katarzyna Kijanija-Placek, Olga Poller & Jan Wolenski (eds.), The Analytical Way. College Publications. 301--322.
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  14. Bjørn Jespersen (2008). Knowing That P Rather Than Q. Sorites 20:125-134.
    I offer a two-tiered critique of epistemological contrastivism as developed by Jonathan Schaffer. First, I investigate the cornerstone of contrastivism, the notion of knowing the selected proposition p rather than the eliminated, or contrast, proposition q. Contrastivism imposes the ternicity constraint that the knowledge relation should span a knower and two propositions. However, contrastivism has yet to explain how to square this constraint with the required contrast between the selected and the eliminated propositions, and it is not immediately obvious how (...)
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  15. Bjørn Jespersen (2008). Predication and Extensionalization. Journal of Philosophical Logic 37 (5):479 - 499.
    In his 2000 book Logical Properties Colin McGinn argues that predicates denote properties rather than sets or individuals. I support the thesis, but show that it is vulnerable to a type-incongruity objection, if properties are (modelled as) functions, unless a device for extensionalizing properties is added. Alternatively, properties may be construed as primitive intensional entities, as in George Bealer. However, I object to Bealer’s construal of predication as a primitive operation inputting two primitive entities and outputting a third primitive entity. (...)
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  16. Bjørn Jespersen (2008). Substitution in Simple Sentences: Validity Versus Soundness. Epistemologia 31 (2):241-262.
     
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  17. Bjørn Jespersen & Chris Reintges (2008). Tractarian Sätze, Egyptian Hieroglyphs, and the Very Idea of Script as Picture. Philosophical Forum 39 (1):1–19.
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  18. Marie Duží, Pavel Materna & Bjørn Jespersen (2006). Points of View From a Logical Perspective. Organon F: Filozoficky Casopis 13 (3):277-305.
    In the paper we offer a logical explication of the frequently used, but rather vague, notion of point of view. We show that the concept of point of view prevents certain paradoxes from arising. A point of view is a means of partial characterisation of something. Thus nothing is a P and at the same time a non-P , because it is a P only relative to some point of view and a non-P from another point of view. But there (...)
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  19. Bjørn Jespersen (2006). The Phone Booth Puzzle. Organon F. Medzinárodný Časopis Pre Analytickú Filozofiu 13 (4):411-439.
    In a 1997 paper Jennifer Saul adduces various examples of simple sentences in which the substitution of one co-referential singular term for another appears to be invalid. I address the question of whether anti-substitution is logically justified by examining the validity and soundness of substitution of co-referential singular terms in three simple-sentence arguments each exhibiting a different logical structure. The result is twofold. First, all three arguments are valid, provided Leibniz’s Law is valid with respect to simple sentences . Thus, (...)
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  20. Bjørn Jespersen (2005). Explicit Intensionalization, Anti-Actualism, and How Smith's Murderer Might Not Have Murdered Smith. Dialectica 59 (3):285–314.
    The purpose of this article is to provide a non‐contradictory interpretation of sentences such as “Smith's murderer might not have murdered Smith”. An anti‐actualist, two‐dimensional framework including partial functions provides the basis for my solution. I argue for two claims. The modal profile of the proposition expressed by “The F might not have been an F” is complex: at any world where there is a unique F the proposition is true; at any world without a unique F the proposition has (...)
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  21. Bjørn Jespersen (2003). Why the Tuple Theory of Structured Propositions Isn't a Theory of Structured Propositions. Philosophia 31 (1-2):171-183.
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  22. Bjørn Jespersen (2002). Pavel Materna, Concepts and Objects. Acta Philosophica Fennica, Vol. 63 Reviewed By. Philosophy in Review 22 (2):130-131.
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  23. Bjørn Jespersen (2002). Pavel Materna, Concepts and Objects. Acta Philosophica Fennica, Vol. 63. [REVIEW] Philosophy in Review 22:130-131.
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  24. Bjørn Jespersen & Pavel Materna (2002). Are Wooden Tables Necessarily Wooden? Acta Analytica 17 (1):115-150.
    This paper defendsintensional essentialism: a property (intensional entity) is not essential relative to an individual (extensional entity), but relative to other properties (or intensional entities). Consequently, an individual can have a property only accidentally, but in virtue of having that property the individual has of necessity other properties. Intensional essentialism is opposed to various aspects of the Kripkean notion of metaphysical modality, eg, varying domains, existence as a property of individuals, and its category of properties which are both empirical and (...)
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  25. Bjørn Jespersen & Marián Zouhar (1999). Proper Proper Names. Organon F: Filozoficky Casopis 6 (2):4-153.
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