51 found
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  1.  97
    I. L. Humberstone (1992). Direction of Fit. Mind 101 (401):59-83.
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  2. I. L. Humberstone (1996). Intrinsic/Extrinsic. Synthese 108 (2):205-267.
    Several intrinsic/extrinsic distinctions amongst properties, current in the literature, are discussed and contrasted. The proponents of such distinctions tend to present them as competing, but it is suggested here that at least three of the relevant distinctions (including here that between non-relational and relational properties) arise out of separate perfectly legitimate intuitive considerations: though of course different proposed explications of the informal distinctions involved in any one case may well conflict. Special attention is paid to the question of whether a (...)
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  3.  40
    I. L. Humberstone (1997). Two Types of Circularity. Philosophy and Phenomenological Research 57 (2):249-280.
    For the claim that the satisfaction of certain conditions is sufficient for the application of some concept to serve as part of the (`reductive') analysis of that concept, we require the conditions to be specified without employing that very concept. An account of the application conditions of a concept not meeting this requirement, we call analytically circular. For such a claim to be usable in determining the extension of the concept, however, such circularity may not matter, since if the concept (...)
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  4.  45
    I. L. Humberstone (1981). From Worlds to Possibilities. Journal of Philosophical Logic 10 (3):313 - 339.
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  5.  39
    I. L. Humberstone (1996). A Study in Philosophical Taxonomy. Philosophical Studies 83 (2):121 - 169.
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  6.  24
    I. L. Humberstone (1991). Two Kinds of Agent-Relativity. Philosophical Quarterly 41 (163):144-166.
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  7.  33
    I. L. Humberstone (1982). Scope and Subjunctivity. Philosophia 12 (1-2):99-126.
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  8.  16
    I. L. Humberstone (1982). First Steps in a Philosophical Taxonomy. Canadian Journal of Philosophy 12 (3):476-478.
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  9.  7
    I. L. Humberstone (1997). Singulary Extensional Connectives: A Closer Look. [REVIEW] Journal of Philosophical Logic 26 (3):341-356.
    The totality of extensional 1-ary connectives distinguishable in a logical framework allowing sequents with multiple or empty (alongside singleton) succedents form a lattice under a natural partial ordering relating one connective to another if all the inferential properties of the former are possessed by the latter. Here we give a complete description of that lattice; its Hasse diagram appears as Figure 1 in §2. Simple syntactic descriptions of the lattice elements are provided in §3; §§4 and 5 give some additional (...)
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  10.  29
    I. L. Humberstone (1971). Two Sorts of 'Ought's. Analysis 32 (1):8 - 11.
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  11.  10
    I. L. Humberstone (1993). Zero-Place Operations and Functional Completeness, and the Definition of New Connectives. History and Philosophy of Logic 14 (1):39-66.
    Tarski 1968 makes a move in the course of providing an account of ?definitionally equivalent? classes of algebras with a businesslike lack of fanfare and commentary, the significance of which may accordingly be lost on the casual reader. In ?1 we present this move as a response to a certain difficulty in the received account of what it is to define a function symbol (or ?operation symbol?). This difficulty, which presents itself as a minor technicality needing to be got around (...)
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  12.  45
    I. L. Humberstone (1990). Wanting, Getting, Having. Philosophical Papers 99 (August):99-118.
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  13.  9
    I. L. Humberstone (1985). The Formalities of Collective Omniscience. Philosophical Studies 48 (3):401 - 423.
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  14.  13
    I. L. Humberstone (1979). Interval Semantics for Tense Logic: Some Remarks. [REVIEW] Journal of Philosophical Logic 8 (1):171 - 196.
  15.  34
    I. L. Humberstone (1987). Wanting as Believing. Canadian Journal of Philosophy 17 (March):49-62.
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  16.  14
    I. L. Humberstone (1983). Inaccessible Worlds. Notre Dame Journal of Formal Logic 24 (3):346-352.
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  17.  2
    I. L. Humberstone (1995). The Logic of Non-Contingency. Notre Dame Journal of Formal Logic 36 (2):214-229.
    We consider the modal logic of non-contingency in a general setting, without making special assumptions about the accessibility relation. The basic logic in this setting is axiomatized, and some of its extensions are discussed, with special attention to the expressive weakness of the language whose sole modal primitive is non-contingency , by comparison with the usual language based on necessity.
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  18.  26
    J. A. Burgess & I. L. Humberstone (1987). Natural Deduction Rules for a Logic of Vagueness. Erkenntnis 27 (2):197-229.
    Extant semantic theories for languages containing vague expressions violate intuition by delivering the same verdict on two principles of classical propositional logic: the law of noncontradiction and the law of excluded middle. Supervaluational treatments render both valid; many-Valued treatments, Neither. The core of this paper presents a natural deduction system, Sound and complete with respect to a 'mixed' semantics which validates the law of noncontradiction but not the law of excluded middle.
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  19.  21
    I. L. Humberstone (1980). You'll Regret It. Analysis 40 (3):175 - 176.
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  20.  16
    I. L. Humberstone (1994). Hempel Meets Wason. Erkenntnis 41 (3):391 - 402.
    The adverse reaction to Hempel's 'ravens paradox' embodied in giving it that description is compared with the usual reaction of experimental subjects to the Wason selection task.
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  21.  9
    I. L. Humberstone (1998). Choice of Primitives: A Note on Axiomatizing Intuitionistic Logic. History and Philosophy of Logic 19 (1):31-40.
    A purported axiomatization, by P. Gärdenfors, of intuitionistic propositional logic is shown to be incomplete, and that the mistaken claim to completeness is seen to result from carelessness in the choice of primitive logical vocabulary. This leads to a consideration of various ways of conceiving the distinction between primitive and defined vocabularies, along with the bearing of these differences on such matters as are discussed in connection with Gärdenfors.
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  22.  8
    I. L. Humberstone (1995). Negation by Iteration. Theoria 61 (1):1-24.
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  23.  12
    I. L. Humberstone (1988). Heterogeneous Logic. Erkenntnis 29 (3):395 - 435.
    This paper considers the question: what becomes of the notion of a logic as a way of codifying valid arguments when the customary assumption is dropped that the premisses and conclusions of these arguments are statements from some single language? An elegant treatment of the notion of a logic, when this assumption is in force, is that provided by Dana Scott's theory of consequence relations; this treatment is appropriately generalized in the present paper to the case where we do not (...)
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  24.  3
    I. L. Humberstone (1988). Some Epistemic Capacities. Dialectica 42 (3):183-200.
    SummaryIf you know you can recognise positive instances of a property, can you use this knowledge so as to be able to recognise also its negative instances? This is the question to be adressed.
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  25.  8
    I. L. Humberstone (1987). The Modal Logic of `All and Only'. Notre Dame Journal of Formal Logic 28 (2):177-188.
  26. I. L. Humberstone (1995). Comparatives and the Reducibility of Relations. Pacific Philosophical Quarterly 76 (2):117-141.
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  27.  2
    I. L. Humberstone (1981). A Note on Two Remarks of Wigging Concerning Restricted Quantification. Australasian Journal of Philosophy 59 (4):432 – 437.
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  28.  5
    I. L. Humberstone (1991). Conditionals, by F. C. Jackson. Philosophy and Phenomenological Research 51 (1):227-234.
  29.  25
    I. L. Humberstone (1990). Expressive Power and Semantic Completeness: Boolean Connectives in Modal Logic. Studia Logica 49 (2):197 - 214.
    We illustrate, with three examples, the interaction between boolean and modal connectives by looking at the role of truth-functional reasoning in the provision of completeness proofs for normal modal logics. The first example (§ 1) is of a logic (more accurately: range of logics) which is incomplete in the sense of being determined by no class of Kripke frames, where the incompleteness is entirely due to the lack of boolean negation amongst the underlying non-modal connectives. The second example (§ 2) (...)
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  30.  5
    I. L. Humberstone (1983). Karmo on Contingent Non-Identity. Australasian Journal of Philosophy 61 (2):188 – 191.
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  31.  3
    J. F. A. K. van Benthem & I. L. Humberstone (1983). Halldén-Completeness by Gluing of Kripke Frames. Notre Dame Journal of Formal Logic 24 (4):426-430.
    We give in this paper a sufficient condition, cast in semantic terms, for Hallden-completeness in normal modal logics, a modal logic being said to be Hallden-complete (or Ήallden-reasonable') just in case for any disjunctive formula provable in the logic, where the disjuncts have no propositional variables in common, one or other of those disjuncts is provable in the logic.
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  32.  21
    I. L. Humberstone (1993). Functional Dependencies, Supervenience, and Consequence Relations. Journal of Logic, Language and Information 2 (4):309-336.
    An analogy between functional dependencies and implicational formulas of sentential logic has been discussed in the literature. We feel that a somewhat different connexion between dependency theory and sentential logic is suggested by the similarity between Armstrong's axioms for functional dependencies and Tarski's defining conditions for consequence relations, and we pursue aspects of this other analogy here for their theoretical interest. The analogy suggests, for example, a different semantic interpretation of consequence relations: instead of thinking ofB as a consequence of (...)
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  33.  3
    I. L. Humberstone (1996). A Basic System of Congruential-to-Monotone Bimodal Logic and Two of Its Extensions. Notre Dame Journal of Formal Logic 37 (4):602-612.
    If what is known need not be closed under logical consequence, then a distinction arises between something's being known to be the case (by a specific agent) and its following from something known (to that subject). When each of these notions is represented by a sentence operator, we get a bimodal logic in which to explore the relations between the two notions.
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  34.  1
    I. L. Humberstone (1987). Critical Notice. Mind 96 (381):99 - 107.
    Book reviewed in this article:F.H. Bradley, Collected Works Volumes 1–5.
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  35.  2
    I. L. Humberstone & A. J. Lock (1986). Semicomplemented Lattices and the Finite Model Property. Mathematical Logic Quarterly 32 (25‐30):431-437.
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  36.  2
    I. L. Humberstone (1993). Review: Keith Devlin, Logic and Information. [REVIEW] Journal of Symbolic Logic 58 (3):1082-1084.
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  37.  1
    I. L. Humberstone (1991). Review: Graeme Forbes, Languages of Possibility. An Essay in Philosophical Logic. [REVIEW] Journal of Symbolic Logic 56 (1):351-352.
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  38.  10
    I. L. Humberstone (1982). Necessary Conclusions. Philosophical Studies 41 (3):321 - 335.
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  39.  7
    I. L. Humberstone (1978). Two Merits of the Circumstantial Operator Language for Conditional Logics. Australasian Journal of Philosophy 56 (1):21 – 24.
  40.  2
    I. L. Humberstone (1991). A Study of Some 'Separated' Conditions on Binary Relations. Theoria 57 (1-2):1-16.
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  41.  1
    I. L. Humberstone (1987). Operational Semantics for Positive ${Rm R}$. Notre Dame Journal of Formal Logic 29 (1):61-80.
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  42. I. L. Humberstone (forthcoming). An Alternative Account of Bringing About. Bulletin of the Section of Logic.
     
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  43. I. L. Humberstone (1989). C. L. Hamblin: "Imperatives". [REVIEW] Australasian Journal of Philosophy 67:239.
     
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  44. I. L. Humberstone (1984). EIKMEYER, H-J. & RIESER, H. : "Words, Worlds, and Contexts: New Approaches in Word Semantics". [REVIEW] Australasian Journal of Philosophy 62:197.
     
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  45. I. L. Humberstone (1986). GABBAY, D. And GUENTHNER, F. : "Handbook of Philosophical Logic, Volume 2: Extensions of Classical Logic". Australasian Journal of Philosophy 64:109.
     
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  46. I. L. Humberstone (1987). Hintikka, J., "The Game of Language: Studies in Game-Theoretical Semantics and its Applications". [REVIEW] Mind 96:99.
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  47. I. L. Humberstone (1990). Luntley, M.: "Language, Logic and Experience: The Case for Anti-Realism". [REVIEW] Australasian Journal of Philosophy 68:465.
     
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  48. I. L. Humberstone (1988). Operational Semantics for Positive "R". Notre Dame Journal of Formal Logic 29:61-80.
     
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  49. I. L. Humberstone (1981). PLATTS, M. , "Reference, Truth and Reality". [REVIEW] Australasian Journal of Philosophy 59:464.
     
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  50. I. L. Humberstone (1992). Some Structural and Logical Aspects of the Notion of Supervenience. Logical Analysis 35 (March-June):101-37.
     
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