Search results for 'Lofti A. Zadeh' (try it on Scholar)

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  1. L. A. Zadeh (1983). A Fuzzy-Set-Theoretic Approach to the Compositionality of Meaning: Propositions, Dispositions and Canonical Forms. Journal of Semantics 2 (3-4):253-272.score: 600.0
    In its traditional interpretation, Frege's principle of compositionality is not sufficiently flexible to have a wide applicability to natural languages. In a fuzzy-set-theoretic setting which is outlined in this paper, Frege's principle is modified and broadened by allowing the meaning of a proposition, p, to be composed not from the meaning of the constituents of p, but, more generally, from the meaning of a collection of fuzzy relations which form a so-called explanatory database that is associated with p. More specifically, (...)
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  2. L. A. Zadeh (1977). Linguistic Characterization of Preference Relations as a Basis for Choice in Social Systems. Erkenntnis 11 (1):383 - 410.score: 540.0
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  3. Morteza Sedaghat Ahangari Hossein Zadeh (2013). How Might a Davidsonian Rescue the Normativity of Meaning? Filozofia Nauki 2.score: 420.0
    For meaning normativism to hold, meaning must have a constitutive part which is obligation-producing. I claim in this paper that linguistic communication is such a constitutive part. I try to show this by means of appeal to Davidson’s triangulation thesis. If I am successful, it may fairly be said that “a Davidsonian can rescue the normativity of meaning”.
     
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  4. L. A. Zadeh (1975). Fuzzy Logic and Approximate Reasoning. Synthese 30 (3-4):407-428.score: 300.0
    The term fuzzy logic is used in this paper to describe an imprecise logical system, FL, in which the truth-values are fuzzy subsets of the unit interval with linguistic labels such as true, false, not true, very true, quite true, not very true and not very false, etc. The truth-value set, , of FL is assumed to be generated by a context-free grammar, with a semantic rule providing a means of computing the meaning of each linguistic truth-value in as a (...)
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  5. B. Bouchon-Meunier, R. R. Yager & L. A. Zadeh (eds.) (1991). Uncertainty in Knowledge Bases. Springer.score: 240.0
    One out of every two men over eigthy suffers from carcinoma of the prostate.It is discovered incidentally in many patients with an alleged benign prostatic ...
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  6. L. A. Zadeh (1957). Review: Gholam-Hossein Mosaheb, Introduction to Formal Logic. [REVIEW] Journal of Symbolic Logic 22 (4):354-355.score: 240.0
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  7. L. A. Zadeh (1970). Review: Sampo Salovaara, On Set Theoretical Foundations of System Theory. Concept. [REVIEW] Journal of Symbolic Logic 35 (4):597-597.score: 240.0
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  8. J. A. Goguen (1973). Review: L. A. Zadeh, Fuzzy Sets; L. A. Zadeh, Similarity Relations and Fuzzy Orderings. [REVIEW] Journal of Symbolic Logic 38 (4):656-657.score: 146.0
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  9. Roberto Giuntini (1991). A Semantical Investigation on Brouwer-Zadeh Logic. Journal of Philosophical Logic 20 (4):411 - 433.score: 144.0
    In the standard approach to quantum mechanics, closed subspaces of a Hilbert space represent propositions. In the operational approach, closed subspaces are replaced by effects that represent a mathematical counterpart for properties which can be measured in a physical system. Effects are a proper generalization of closed subspaces. Effects determine a Brouwer-Zadeh poset which is not a lattice. However, such a poset can be embedded in a complete Brouwer-Zadeh lattice. From an intuitive point of view, one can say (...)
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  10. Jeffrey M. Perl, Natalie Zemon Davis & Barry Allen (2011). Fuzzy Studies a Symposium on the Consequence of Blur Part 1. Common Knowledge 17 (3):441-449.score: 126.0
    In this introduction to Part 1 of the Common Knowledge symposium, “Fuzzy Studies,” the journal's editor discusses four essays from the 1980s by Richard Rorty, in which Rorty chose to associate himself with various neopragmatists, Continental thinkers, and “left-wing Kuhnians” under the rubric of the “new fuzziness.” The term had been introduced as an insult by a philosopher of science with positivist leanings, but Rorty took it up as an “endearing” compliment, arguing that “to be less fuzzy” was also to (...)
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  11. Edmund D. Pellegrino & David C. Thomasma (1981). Toward an Axiology for Medicine a Response to Kazem Sadegh-Zadeh. Theoretical Medicine and Bioethics 2 (3):331-342.score: 120.0
  12. Ingmar Pörn (1984). Comments on Sadegh-Zadeh's 'a Pragmatic Concept of Causal Explanation'. In. In Lennart Nordenfelt & B. I. B. Lindahl (eds.), Health, Disease, and Causal Explanations in Medicine. Reidel. 211--212.score: 120.0
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  13. Enric Trillas (1996). Menger's Trace in Fuzzy Logic. Theoria 11 (3):89-96.score: 90.0
    This paper deals with the relation with Fuzzy Logic of some of the ideas of Karl Menger published between 1942 and 1966 and concerning what he called “Hazy Sets”, Probabilistic Relations and Statistical Metric Spaces. The author maintains the opinion that if Lofti A. Zadeh is actually the father of Fuzzy Logic, Menger not only was a forerunner of this field but that his ideas were and still are influential on it.
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  14. María G. Navarro (2013). On Fuzziness and Ordinary Reasoning. Studies in Fuzziness and Soft Computing 216 (463):468.score: 62.0
    In 1685, in The Art of Discovery, Leibniz set down an extraordinary idea: "The only way to rectify our reasonings is to make them as tangible as those of the Mathematicians, so that we can find our error at a glance, and when there are disputes among persons, we can simply say: Let us calculate [calculemus], without further ado, to see who is right." Calculemus.
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  15. A. Sobrino (1992). Frege, Zadeh y la lógica de la oración. Theoria 7 (1/2/3):171-192.score: 60.0
    Este trabajo pretende examinar las coincidencias y divergencias que, en el modo de analizar lógicamente la oración, presentan las teorías de Frege y Zadeh. Este estudio previo proporcionará algunas razones para responder a la pregunta de si la teoría de Zadeh representa una ruptura o una evolución respecto al modo de análisis clásico fregeano.
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  16. G. Cattaneo, J. Hamhalter & P. Pták (2000). On the de Morgan Property of the Standard Brouwer–Zadeh Poset. Foundations of Physics 30 (10):1801-1805.score: 54.0
    The standard Brouwer–Zadeh poset Σ(H) is the poset of all effect operators on a Hilbert space H, naturally equipped with two types of orthocomplementation. In developing the theory, the question occured if (when) Σ(H) fulfils the de Morgan property with respect to both orthocomplementation operations. In Ref.3 the authors proved that it is the case provided dimH<∞, and they conjectured that if dimH=∞, then the answer is in the negative. In this note, we first give a somewhat simpler proof (...)
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  17. Bob Hodge (2007). Life, Chaos, and Transdisciplinarity: A Personal Journey. World Futures 63 (3 & 4):209 – 222.score: 54.0
    This article uses an autobiography as an object of research, to both illustrate some principles of chaos theory in analytic practice, and give those ideas a personal and social context, thereby producing a unique but explanation-rich history of chaos theory and recent intellectual history of transdisciplinarity and social research in the West. The ideas from Chaos Theory it uses and illustrates include: three-body analysis (Poincaré); fractals (Mandelbrot); fuzzy logic (Zadeh); and the butterfly effect (Lorenz).
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  18. Roberto Giuntini (1992). Brouwer-Zadeh Logic, Decidability and Bimodal Systems. Studia Logica 51 (1):97 - 112.score: 54.0
    We prove that Brouwer-Zadeh logic has the finite model property and therefore is decidable. Moreover, we present a bimodal system (BKB) which turns out to be characterized by the class of all Brouwer-Zadeh frames. Finally, we show that BrouwerZadeh logic can be translated into BKB.
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  19. Roberto Giuntini (1990). Brouwer-Zadeh Logic and the Operational Approach to Quantum Mechanics. Foundations of Physics 20 (6):701-714.score: 54.0
    This paper is concerned with a logical system, called Brouwer-Zadeh logic, arising from the BZ poset of all effects of a Hilbert space. In particular, we prove a representation theorem for Brouwer-Zadeh lattices, and we show that Brouwer-Zadeh logic is not characterized by the MacNeille completions of all BZ posets of effects.
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  20. Gabriel A. Rincón-Mora & H. Pooya Forghani-Zadeh (2005). Accurate and Lossless Current-Sensing Techniques for Power Applications--A Practical Myth? In Alan F. Blackwell & David MacKay (eds.), Power. Cambridge University Press. 2--58.score: 54.0
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  21. Kazem Sadegh-Zadeh (1980). Bayesian Diagnostics: A Bibliography Part. Theoretical Medicine and Bioethics 1 (1):107-124.score: 36.0
  22. Kazem Sadegh-Zadeh (1987). The Three Paradoxes Lost a Response to Moore and Hutchins. Theoretical Medicine and Bioethics 2 (2):217-233.score: 36.0
    Moore and Hutchin''s [1] assertion that the application of classical logic as the method of diagnostic reasoning may result in three paradoxes is critically examined.
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  23. Kazem Sadegh-Zadeh (1984). A Pragmatic Concept of Causal Explanation. In. In Lennart Nordenfelt & B. I. B. Lindahl (eds.), Health, Disease, and Causal Explanations in Medicine. Reidel. 201--209.score: 36.0
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  24. Kazem Sadegh-Zadeh (1982). Therapeuticum and Therapy: A Commentary on Lindahl and Lindwall's Skepticism. Theoretical Medicine and Bioethics 3 (2):261-262.score: 36.0
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  25. Kazem Sadegh-Zadeh (1985). The Editor is Pleased to Announce That, Beginning with the Issue to Appear in October 1982, Several Issues of Metamedicine Will Be Devoted to Special Topics," as Listed Below. A Guest Editor Will Be Responsible for Each Issue. Philosophy 6 (2).score: 36.0
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  26. A. Pragmatic Concept of Causal Explanation (1984). Kazem sadegh-Zadeh. In Lennart Nordenfelt & B. I. B. Lindahl (eds.), Health, Disease, and Causal Explanations in Medicine. Reidel. 201.score: 36.0
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  27. Kazem Sadegh-Zadeh (1978). On the Limits of the Statistical-Causal Analysis as a Diagnostic Procedure. Theory and Decision 9 (1):93-107.score: 36.0
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  28. K. Sadegh-Zadeh (2008). The Prototype Resemblance Theory of Disease. Journal of Medicine and Philosophy 33 (2):106-139.score: 30.0
    In a previous paper the concept of disease was fuzzy-logically analyzed and a sketch was given of a prototype resemblance theory of disease (Sadegh-Zadeh (2000). J. Med. Philos., 25:605–38). This theory is outlined in the present paper. It demonstrates what it means to say that the concept of disease is a nonclassical one and, therefore, not amenable to traditional methods of inquiry. The theory undertakes a reconstruction of disease as a category that in contradistinction to traditional views is not (...)
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  29. Wolfgang G. Stock (1988). Semantische Vagheiten im Lichte der dreiwertigen Logik, der Superbewertung und der unscharfen Logik. Grazer Philosophische Studien 31:123-146.score: 28.0
    Die Reihe formaler Sprachen, die im Verständnis von M.J. Cresswell "sinnvoll" als Modelle für natüriiche Sprachen anzusehen sind und die dabei auch semantische Vagheiten zu erfassen gestatten, nämlich die dreiwertige Logik (U. Blau), die Superbewertung (B.C. van Fraassen, K. Fine, M. Pinkal, J. Ballweg) und die unscharfe Logik (L.A. Zadeh), legt nahe, daß bei der Sprachanalyse Zadehs "Prinzip der Inkompatibilität" gilt: Hohe Präzision ist inkompatibel mit hoher Komplexität. Je komplexer man das Vagheitsproblem angeht, desto verschwommener wird der benutzbare Geltungswert. (...)
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  30. Rohit Parikh (1994). Vagueness and Utility: The Semantics of Common Nouns. [REVIEW] Linguistics and Philosophy 17 (6):521 - 535.score: 24.0
    A utility-based approach to the understanding of vague predicates (VPs) is proposed. It is argued that assignment of truth values to propositions containing VPs entails unjustifiable assumptions of consensus; two models of VP semantics are criticized on this basis: (1) the super-truth theory of Kit Fine (1975), which requires an unlikely consensus on base points; (2) the fuzzy logic of Lotfi Zadeh (1975), on fuzzy truth values of sentences. Pragmatism is held to provide a key: successful behavior justifies a (...)
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  31. Lennart Nordenfelt (2000). On the Place of Fuzzy Health in Medical Theory. Journal of Medicine and Philosophy 25 (5):639 – 649.score: 24.0
    This commentary on Sadegh-Zadeh's article 'Fuzzy health, illness and disease,' has its focus on the philosophical background for applying fuzzy logic to medical theory. I concentrate on four issues. First, I contest some of Sadegh-Zadeh's statements on the present state of the theory of medicine, in particular with regard to assumptions ascribed to contemporary theorists. Second, I consider Sadegh-Zadeh's interesting idea that a person can have a disease to varying degrees, from not having it at all to (...)
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  32. Gianpiero Cattaneo & Roberto Giuntini (1995). Some Results on BZ Structures From Hilbertian Unsharp Quantum Physics. Foundations of Physics 25 (8):1147-1183.score: 24.0
    Some algebraic structures determined by the class σ(þ) of all effects of a Hilbert space þ and by some subclasses of σ(þ) are investigated, in particular de Morgan-Brouwer-Zadeh posets [it is proved that σ(þ n )(n<∞) has such a structure], Brouwer-Zadeh * posets (a quite trivial example consisting of suitable effects is given), and Brouwer-Zadeh 3 posets which are both de Morgan and *.It is shown that a nontrivial class of effects of a Hilbert space exists which (...)
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  33. G. Cattaneo, R. Giuntini & S. Pulmannovà (2000). Pre-BZ and Degenerate BZ Posets: Applications to Fuzzy Sets and Unsharp Quantum Theories. [REVIEW] Foundations of Physics 30 (10):1765-1799.score: 24.0
    Two different generalizations of Brouwer–Zadeh posets (BZ posets) are introduced. The former (called pre-BZ poset) arises from topological spaces, whose standard power set orthocomplemented complete atomic lattice can be enriched by another complementation associating with any subset the set theoretical complement of its topological closure. This complementation satisfies only some properties of the algebraic version of an intuitionistic negation, and can be considered as, a generalized form of a Brouwer negation. The latter (called degenerate BZ poset) arises from the (...)
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  34. Lothar Philipps (1999). Approximate Syllogisms – on the Logic of Everyday Life. Artificial Intelligence and Law 7 (2-3):227-234.score: 24.0
    Since Aristotle it is recognised that a valid syllogism cannot have two particular premises. However, that is not how a lay person sees it; at least as long as the premises read many, most etc, instead of a plain some. The lay people are right if one considers that these syllogisms do not have strict but approximate (Zadeh) validity. Typically there are only particular premises available in everyday life and one is dependent on such syllogisms. – Some rules on (...)
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  35. Gianpiero Cattaneo, Maria L. Dalla Chiara & Roberto Giuntini (1993). Fuzzy Intuitionistic Quantum Logics. Studia Logica 52 (3):419 - 442.score: 24.0
    Fuzzy intuitionistic quantum logics (called also Brouwer-Zadeh logics) represent to non standard version of quantum logic where the connective not is split into two different negation: a fuzzy-like negation that gives rise to a paraconsistent behavior and an intuitionistic-like negation. A completeness theorem for a particular form of Brouwer-Zadeh logic (BZL 3) is proved. A phisical interpretation of these logics can be constructed in the framework of the unsharp approach to quantum theory.
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  36. Gianpiero Cattaneo & Federico Laudisa (1994). Axiomatic Unsharp Quantum Theory (From Mackey to Ludwig and Piron). Foundations of Physics 24 (5):631-683.score: 24.0
    On the basis of Mackey's axiomatic approach to quantum physics or, equivalently, of a “state-event-probability” (SEVP) structure, using a quite standard “fuzzification” procedure, a set of unsharp events (or “effects”) is constructed and the corresponding “state-effect-probability” (SEFP) structure is introduced. The introduction of some suitable axioms gives rise to a partially ordered structure of quantum Brouwer-Zadeh (BZ) poset; i.e., a poset endowed with two nonusual orthocomplementation mappings, a fuzzy-like orthocomplementation, and an intuitionistic-like orthocomplementation, whose set of sharp elements is (...)
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  37. Peter Milne, Betting on Fuzzy and Many–Valued Propositions.score: 24.0
    From Introduction: In a 1968 article, ‘Probability Measures of Fuzzy Events’, Lotfi Zadeh pro-posed accounts of absolute and conditional probability for fuzzy sets (Zadeh, 1968).
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  38. Athanassios Tzouvaras (2003). An Axiomatization of 'Very' Within Systiems of Set Theory. Studia Logica 73 (3):413 - 430.score: 24.0
    A structural (as opposed to Zadeh's quantitative) approach to fuzziness is given, based on the operator "very", which is added to the language of set theory together with some elementary axioms about it. Due to the axiom of foundation and to a lifting axiom, the operator is proved trivial on the cumulative hierarchy of ZF. So we have to drop either foundation or lifting. Since fuzziness concerns complemented predicates rather than sets, a class theory is needed for the very (...)
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  39. G. William Moore & Grover M. Hutchins (1987). Three Paradoxes of Medical Diagnosis. Theoretical Medicine and Bioethics 2 (2):197-215.score: 24.0
    Sadegh-zadeh [23] has proposed a theory of the relativity of medical diagnosis in terms of the time at which a diagnosis is accepted, the patient to whom the diagnosis applies, the physician who renders the diagnosis, the medical knowledge used, the diagnostic method applied, and the set of patient observations. Use of classical formal logic as the diagnostic method may result in three paradoxes: the paradoxes of consistency, completeness, and justifiable ignorance. These paradoxes may be resolved by the addition (...)
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  40. Heinz J. Skala (1976). On the Problem of Imprecision. Theory and Decision 7 (3):159-170.score: 24.0
    Among the problems raised by admitting statements which are neither true nor false is the problem of how we are to cope with vague concepts. One method of dealing with such concepts has been suggested by Rosser/Turquette (1952), i.e. the employment of a many valued set theory. It is our intention in this paper to discuss the use of many valued logics, especially the set theoretical proposals of Zadeh and Brown, in dealing with this problem. Towards this end, we (...)
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  41. Senén Barro & Alberto J. Bugarin (1996). ¿Cuáles Son Las Aplicaciones de la Lógica Borrosa? (Which Are Some of the Applications of Fuzzy Logic?). Theoria 11 (3):149-161.score: 24.0
    Este trabajo orienta su contenido a las aplicaciones de la lógica borrosa, pero no desde una aproximación que trate de abordar ciertas caracterrsticas relevantes de algunas de ellas y/o comentar sus coincidencias y discrepancias desde el punto de vista dei soporte dado por la lógica borrosa. Existen excelentes y abundantes revisiones de este estilo (véanse, por ejemplo, Zadeh, Vager 1992), por lo que nosotros hemos optado por introducir algunas reflexiones a modo de respuesta a preguntas formuladas al hilo de (...)
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  42. Lorenzo Peña (1992). Algunas aplicaciones filosóficas de las lógicas multivalentes. Theoria 7 (1/2/3):141-163.score: 24.0
    Many-Valued logics can harbour nonclassical connectives expressing truth-nuances. The course of development of many-valued logics has given rise to paraconsistent systems wherein a sentence can be both negated and asserted just in case it is only partly true. A recently implemented family of such logics is shown to be a useful tool in coping with a number of philosophical difficulties, such as Zeno’s paradox of the arrow. This family is somehow akin to fuzzy logics initiated by Zadeh, but unlike (...)
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  43. Alberto J. Bugarin (1996). ¿Cuáles son las aplicaciones de la lógica borrosa? (Which Are Some of the Applications of Fuzzy Logic?). Theoria 11 (3):149-161.score: 24.0
    Este trabajo orienta su contenido a las aplicaciones de la lógica borrosa, pero no desde una aproximación que trate de abordar ciertas caracterrsticas relevantes de algunas de ellas y/o comentar sus coincidencias y discrepancias desde el punto de vista dei soporte dado por la lógica borrosa. Existen excelentes y abundantes revisiones de este estilo (véanse, por ejemplo, Zadeh, Vager 1992), por lo que nosotros hemos optado por introducir algunas reflexiones a modo de respuesta a preguntas formuladas al hilo de (...)
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  44. Kazem Sadegh-Zadeh (2000). Fuzzy Health, Illness, and Disease. Journal of Medicine and Philosophy 25 (5):605 – 638.score: 12.0
    The notions of health, illness, and disease are fuzzy-theoretically analyzed. They present themselves as non-Aristotelian concepts violating basic principles of classical logic. A recursive scheme for defining the controversial notion of disease is proposed that also supports a concept of fuzzy disease. A sketch is given of the prototype resemblance theory of disease.
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  45. Kazem Sadegh-Zadeh (1982). Perception, Illusion, and Hallucination. Theoretical Medicine and Bioethics 3 (2):159-191.score: 12.0
    Patrick Suppes'' set-theoretical approach to the analysis of theories, and Joseph D. Sneed''s metatheory are briefly outlined. The notions of observation, illusion and hallucination are reconstructed according to these approaches. It is argued that the terms perception and truth are theoretical with respect to observation but nontheoretical with respect to illusion and hallucination. Hallucination is construed as a special kind of illusion.
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  46. Kazem Sadegh-Zadeh (1981). World 5 and Medical Knowledge. Journal of Medicine and Philosophy 6 (3):263-270.score: 12.0
    What follows is a brief comment on Ludwik Fleck's paper on the foundations of medical knowledge translated by Thaddeus J. Trenn in this issue. Since the original is much older than I am, I have some scruples in presenting the critical thoughts which occurred to me when I read it a few years ago. Despite the criticism, I am very sympathetic to most of what Fleck has told us in his tragically neglected work. Two facts make Fleck's tragedy even more (...)
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  47. Kazem Sadegh-Zadeh (1987). Foundations of Clinical Praxiology Part I: The Relativity of Medical Diagnosis. Theoretical Medicine and Bioethics 2 (2):183-196.score: 12.0
    The question is raised whether it would be beneficial to establish a clinical praxiology for the sake of a multi-focused inquiry into the foundations of clinical pratice. Beginning with the concept of medical diagnosis, a framework is presented which makes it possible to view diagnosis as an element of a complex structure whose adequate analysis requires at least comparative diagnostic methodology and epistemology.
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  48. Kazem Sadegh-Zadeh (1981). Normative Systems and Medical Metaethics Part I: Value Kinematics, Health, and Disease. Theoretical Medicine and Bioethics 2 (1):75-119.score: 12.0
    On the basis of a ten-place comparative value relation, artificially reduced to a binary relation, some human value structures are studied and a concept of value kinematics is proposed. A miniature value logic is outlined, making it possible with precision to handle several explicated value notions and to analyze interrelations between them. Finally, the question is discussed whether health can be said to be an absolute and an intrinsic value.
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  49. Kazem Sadegh-Zadeh (1982). Foundations of Clinical Praxiology Part II: Categorical and Conjectural Diagnoses. Theoretical Medicine and Bioethics 3 (1):101-114.score: 12.0
    The concepts of categorical diagnosis and conjectural diagnosis are introduced. It is argued that in diagnostic reasoning conjectural diagnosis plays a more important role than categorical diagnosis. Attention is called to the inevitable vagueness of clinical language and to the suitability of epistemic logic and fuzzy logic for diagnostic reasoning.
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