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Erschienen in: Soft Computing 3/2015

01.03.2015 | Foundations

Paraconsistency properties in degree-preserving fuzzy logics

verfasst von: Rodolfo Ertola, Francesc Esteva, Tommaso Flaminio, Lluís Godo, Carles Noguera

Erschienen in: Soft Computing | Ausgabe 3/2015

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Abstract

Paraconsistent logics are specially tailored to deal with inconsistency, while fuzzy logics primarily deal with graded truth and vagueness. Aiming to find logics that can handle inconsistency and graded truth at once, in this paper we explore the notion of paraconsistent fuzzy logic. We show that degree-preserving fuzzy logics have paraconsistency features and study them as logics of formal inconsistency. We also consider their expansions with additional negation connectives and first-order formalisms and study their paraconsistency properties. Finally, we compare our approach to other paraconsistent logics in the literature.

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Fußnoten
1
Notice here that in the frame of LFIs the term consistent refers to formulas that basically exhibit a classical logic behavior, so in particular an explosive behavior.
 
2
In a very general setting, one could argue what properties should be required for a unary connective to be properly called a negation. However, in the context of the fuzzy logic systems considered later in this paper, all the negation connectives that we will deal with are indeed proper negations, in the sense that their truth tables always revert to the classical negation truth-table as soon as we restrict ourselves to the classical 0 and 1 truth values.
 
3
\(c(\chi _1,\dots , \varphi ,\dots ,\chi _n)\) and \(c(\chi _1,\dots , \psi ,\dots ,\chi _n)\) denote two instances of the \(n\)-ary connective \(c\) where \(\varphi \) and \(\psi \) appear in a same (arbitrary) \(i\)-th place in \(c\) (for \(1 \le i \le n\)), while keeping the same formulas \(\chi _j\)’s (with \(j \ne i\)) in the other places.
 
4
Moreover, for a number of core fuzzy logics, including \(\mathrm{MTL}\), it has been shown that their corresponding varieties are also generated by the subclass of \(\mathrm{MTL}\)-chains defined on the real unit interval, called standard algebras. For instance, \(\mathrm{MTL}\) is also complete wrt standard \(\mathrm{MTL}\)-chains, that are of the form \([0,1]_*=\langle [0,1], \min , \max , *,\rightarrow _*,1,0\rangle \) of type \(\langle 2,2,2,2,0,0\rangle \), where \(*\) denotes a left-continuous t-norm and \(\rightarrow _*\) is its residuum (Jenei and Montagna 2002).
 
5
It is worth noticing that, even if we drop in the above definition the condition of the existence of a finite \(\varGamma _0 \subseteq \varGamma \), the logic \(\mathrm{L}^{\le }\) remains finitary (Jansana 2013).
 
6
Note that applications of inference rules in \(\varPhi \) are only to theorems of \(\mathrm{L}\).
 
7
In Priest (2002b) it was already noted that the degree-preserving Łukasiewicz logic \(\L ^{\le }\) was paraconsistent.
 
8
This type of chains are studied in Noguera et al. (2005a).
 
9
Given a natural number \(n\), \(\varphi ^n\) is an abbreviation for \( \varphi \mathbin { \& }\mathop {\ldots }\limits ^{n} \mathbin { \& } \varphi \), that is, the formula obtained as conjunction of \(n\) times \(\varphi \).
 
10
Note that \(x\) and \(y\) correspond, respectively, to \(e_1(\varphi )\) and \(e_2(\varphi )\).
 
11
An S\(_n\) \(\mathrm{MTL}\)-chain \(\mathbf A\) is a \(\mathrm{MTL}\)-chain satisfying the equation \(x \vee \lnot x^{n-1} = \overline{1}^\mathbf{A}\).
 
12
Of course, the interesting case is when the negation \(\lnot \) of \(\mathrm{L}\) is not involutive.
 
13
As it occurs either in any pseudo-complemented logic where \(\triangle \) is definable as \(\triangle \varphi := \lnot \mathord \sim \varphi \) or in a finitely valued Łukasiewicz logic Ł\(_n\)where \(\triangle \) is definable as \(\triangle \varphi := \varphi ^n\).
 
14
For more details and proofs see e.g. Cintula et al. (2011).
 
Literatur
Zurück zum Zitat Avron A, Zamansky A (2007) Non-deterministic multi-valued matrices for first-order logics of formal inconsistency. In: Proceedings of the 37th international symposium on multiple-valued logic, ISMVL. IEEE Press, Oslo, p 14 Avron A, Zamansky A (2007) Non-deterministic multi-valued matrices for first-order logics of formal inconsistency. In: Proceedings of the 37th international symposium on multiple-valued logic, ISMVL. IEEE Press, Oslo, p 14
Zurück zum Zitat Batens D (1980) Paraconsistent extensional propositional logics. Logique et Analyse 23:195–234MATHMathSciNet Batens D (1980) Paraconsistent extensional propositional logics. Logique et Analyse 23:195–234MATHMathSciNet
Zurück zum Zitat Besnard P, Hunter A (eds) (1998) Reasoning with actual and potential contradictions. Handbook of defeasible reasoning and uncertainty management systems, vol 2. Kluwer, Dordrecht Besnard P, Hunter A (eds) (1998) Reasoning with actual and potential contradictions. Handbook of defeasible reasoning and uncertainty management systems, vol 2. Kluwer, Dordrecht
Zurück zum Zitat Blok WJ, Pigozzi DL (1989) Algebraizable logics, vol 77. Memoirs of the American Mathematical Society, Providence Blok WJ, Pigozzi DL (1989) Algebraizable logics, vol 77. Memoirs of the American Mathematical Society, Providence
Zurück zum Zitat Bou F, Esteva F, Font JM, Gil À, Godo L, Torrens A, Verdú V (2009) Logics preserving degrees of truth from varieties of residuated lattices. J Log Comput 19(6):1031–1069CrossRefMATH Bou F, Esteva F, Font JM, Gil À, Godo L, Torrens A, Verdú V (2009) Logics preserving degrees of truth from varieties of residuated lattices. J Log Comput 19(6):1031–1069CrossRefMATH
Zurück zum Zitat Carnielli W, Coniglio ME, Marcos J (2007) Logics of formal inconsistency. In: Gabbay D, Guenthner F (eds) Handbook of philosophical logic, vol 14, 2nd edn. Springer, Berlin, pp 1–93CrossRef Carnielli W, Coniglio ME, Marcos J (2007) Logics of formal inconsistency. In: Gabbay D, Guenthner F (eds) Handbook of philosophical logic, vol 14, 2nd edn. Springer, Berlin, pp 1–93CrossRef
Zurück zum Zitat Castiglioni JL, Ertola RC (2014) Strict paraconsistency of truth-degree preserving intuitionistic logic with dual negation. Log J IGPL 22(2):268–273 Castiglioni JL, Ertola RC (2014) Strict paraconsistency of truth-degree preserving intuitionistic logic with dual negation. Log J IGPL 22(2):268–273
Zurück zum Zitat Cignoli R, D’Ottaviano IML, Mundici D (1999) Algebraic foundations of many-valued reasoning. Trends in logic, vol 7. Kluwer, Dordrecht Cignoli R, D’Ottaviano IML, Mundici D (1999) Algebraic foundations of many-valued reasoning. Trends in logic, vol 7. Kluwer, Dordrecht
Zurück zum Zitat Cintula P, Noguera C (2011) A general framework for mathematical fuzzy logic. In: Cintula P, Hájek P, Noguera C (eds) Handbook of mathematical fuzzy logic-volume 1. Studies in logic, mathematical logic and foundations, vol 37. College Publications, London, pp 103–207 Cintula P, Noguera C (2011) A general framework for mathematical fuzzy logic. In: Cintula P, Hájek P, Noguera C (eds) Handbook of mathematical fuzzy logic-volume 1. Studies in logic, mathematical logic and foundations, vol 37. College Publications, London, pp 103–207
Zurück zum Zitat Cintula P, Klement E-P, Mesiar R, Navara M (2010) Fuzzy logics with an additional involutive negation. Fuzzy Sets Syst 161(3):390–411CrossRefMATHMathSciNet Cintula P, Klement E-P, Mesiar R, Navara M (2010) Fuzzy logics with an additional involutive negation. Fuzzy Sets Syst 161(3):390–411CrossRefMATHMathSciNet
Zurück zum Zitat Cintula P, Hájek P, Noguera C (eds) (2011) Handbook of mathematical fuzzy logic. Studies in logic, mathematical logic and foundations, vols 37, 38. College Publications, London Cintula P, Hájek P, Noguera C (eds) (2011) Handbook of mathematical fuzzy logic. Studies in logic, mathematical logic and foundations, vols 37, 38. College Publications, London
Zurück zum Zitat da Costa N (1974) On the theory of inconsistent formal systems. Notre Dame J Form Log 15:497–510CrossRefMATH da Costa N (1974) On the theory of inconsistent formal systems. Notre Dame J Form Log 15:497–510CrossRefMATH
Zurück zum Zitat da Costa N, Alves E (1977) A semantical analysis of the calculi \(C_n\). Notre Dame J Form Log 18:621–630CrossRefMATH da Costa N, Alves E (1977) A semantical analysis of the calculi \(C_n\). Notre Dame J Form Log 18:621–630CrossRefMATH
Zurück zum Zitat Dunn M (1976) Intuitive semantics for first degree entailment and ‘coupled trees’. Philos Stud 29:149–168CrossRefMathSciNet Dunn M (1976) Intuitive semantics for first degree entailment and ‘coupled trees’. Philos Stud 29:149–168CrossRefMathSciNet
Zurück zum Zitat Dunn M, Restall G (2002) Relevance logic. In: Gabbay D, Guenthner F (eds) Handbook of philosophical logic, vol 6. Kluwer, Dordrecht, pp 1–136CrossRef Dunn M, Restall G (2002) Relevance logic. In: Gabbay D, Guenthner F (eds) Handbook of philosophical logic, vol 6. Kluwer, Dordrecht, pp 1–136CrossRef
Zurück zum Zitat Ertola RC (2009) On some operations using the min operator. In: Carnielli W, Coniglio ME, D’Ottaviano IML (eds) The many sides of logic. Studies in logic, vol 21. College Publications, London, pp 353–368 Ertola RC (2009) On some operations using the min operator. In: Carnielli W, Coniglio ME, D’Ottaviano IML (eds) The many sides of logic. Studies in logic, vol 21. College Publications, London, pp 353–368
Zurück zum Zitat Esteva F, Godo L (2001) Monoidal t-norm based logic: towards a logic for left-continuous t-norms. Fuzzy Sets Syst 124(3):271–288CrossRefMATHMathSciNet Esteva F, Godo L (2001) Monoidal t-norm based logic: towards a logic for left-continuous t-norms. Fuzzy Sets Syst 124(3):271–288CrossRefMATHMathSciNet
Zurück zum Zitat Esteva F, Godo L, Hájek P, Navara M (2000) Residuated fuzzy logics with an involutive negation. Arch Math Log 39(2):103–124CrossRefMATH Esteva F, Godo L, Hájek P, Navara M (2000) Residuated fuzzy logics with an involutive negation. Arch Math Log 39(2):103–124CrossRefMATH
Zurück zum Zitat Flaminio T, Marchioni E (2006) T-norm based logics with an independent involutive negation. Fuzzy Sets Syst 157(4):3125–3144CrossRefMATHMathSciNet Flaminio T, Marchioni E (2006) T-norm based logics with an independent involutive negation. Fuzzy Sets Syst 157(4):3125–3144CrossRefMATHMathSciNet
Zurück zum Zitat Font JM, Gil A, Torrens A, Verdú V (2006) On the infinite-valued Łukasiewicz logic that preserves degrees of truth. Arch Math Log 45(7):839–868 Font JM, Gil A, Torrens A, Verdú V (2006) On the infinite-valued Łukasiewicz logic that preserves degrees of truth. Arch Math Log 45(7):839–868
Zurück zum Zitat Goodman ND (1981) The logic of contradiction. Zeitschrift für Mathmatische Logik und Grundlagen der Mathematik 27:119–126 Goodman ND (1981) The logic of contradiction. Zeitschrift für Mathmatische Logik und Grundlagen der Mathematik 27:119–126
Zurück zum Zitat Haniková Z (2011) Computational complexity of propositional fuzzy logics. In: Cintula P, Hájek P, Noguera C (eds) Handbook of mathematical fuzzy logic-vol 2. Studies in logic, mathematical logic and foundations, vol 38. College Publications, London, pp 793–851 Haniková Z (2011) Computational complexity of propositional fuzzy logics. In: Cintula P, Hájek P, Noguera C (eds) Handbook of mathematical fuzzy logic-vol 2. Studies in logic, mathematical logic and foundations, vol 38. College Publications, London, pp 793–851
Zurück zum Zitat Jansana R (2013) On deductive systems associated with equationally orderable quasivarieties. In: Proceedings of the 19th international conference on logic for programming, artificial intelligence and reasoning LPAR, Stellenbosch, South Africa Jansana R (2013) On deductive systems associated with equationally orderable quasivarieties. In: Proceedings of the 19th international conference on logic for programming, artificial intelligence and reasoning LPAR, Stellenbosch, South Africa
Zurück zum Zitat Jaśkowski S (1969) Propositional calculus for contradictory deductive systems. Stud Log 24(1):143–157CrossRefMATH Jaśkowski S (1969) Propositional calculus for contradictory deductive systems. Stud Log 24(1):143–157CrossRefMATH
Zurück zum Zitat Johansson I (1936) Der Minimalkalkül, ein reduzierter intuitionistischer Formalismus. Compositio Mathematica 4(1):119–136 Johansson I (1936) Der Minimalkalkül, ein reduzierter intuitionistischer Formalismus. Compositio Mathematica 4(1):119–136
Zurück zum Zitat Moisil GC (1942) Logique modale. Disquisitiones math. et phys., Bucarest, II, vol 1, pp 3–98 [Reprinted. In: Moisil GC (ed) (1972) Essais sur les logiques non chrysippiennes. Éditions de l’Académie de la République Socialiste de Roumanie, Bucarest] Moisil GC (1942) Logique modale. Disquisitiones math. et phys., Bucarest, II, vol 1, pp 3–98 [Reprinted. In: Moisil GC (ed) (1972) Essais sur les logiques non chrysippiennes. Éditions de l’Académie de la République Socialiste de Roumanie, Bucarest]
Zurück zum Zitat Noguera C (2007) Algebraic study of axiomatic extensions of triangular norm based fuzzy logics. Monografies de l’Institut d’Investigació en Intel\(\cdot \)ligència artificial, vol 27. CSIC, Barcelona Noguera C (2007) Algebraic study of axiomatic extensions of triangular norm based fuzzy logics. Monografies de l’Institut d’Investigació en Intel\(\cdot \)ligència artificial, vol 27. CSIC, Barcelona
Zurück zum Zitat Noguera C, Esteva F, Gispert J (2005a) On some varieties of MTL-algebras. Log J IGPL 13(4):443–466 Noguera C, Esteva F, Gispert J (2005a) On some varieties of MTL-algebras. Log J IGPL 13(4):443–466
Zurück zum Zitat Noguera C, Esteva F, Gispert J (2005b) Perfect and bipartite IMTL-algebras and disconnected rotations of prelinear semihoops. Arch Math Log 44(7):869–886 Noguera C, Esteva F, Gispert J (2005b) Perfect and bipartite IMTL-algebras and disconnected rotations of prelinear semihoops. Arch Math Log 44(7):869–886
Zurück zum Zitat Priest G (2002a) Paraconsistent logic. In: Gabbay D, Guenthner F (eds) Handbook of philosophical logic, vol 6, 2nd edn. Kluwer, Dordrecht, pp 287–393 Priest G (2002a) Paraconsistent logic. In: Gabbay D, Guenthner F (eds) Handbook of philosophical logic, vol 6, 2nd edn. Kluwer, Dordrecht, pp 287–393
Zurück zum Zitat Priest G (2002b) Fuzzy relevant logic. In: Carnielli WA et al (eds) Chapter 11 in paraconsistency: the logical way to the inconsistent. CRC Press, Boca Raton Priest G (2002b) Fuzzy relevant logic. In: Carnielli WA et al (eds) Chapter 11 in paraconsistency: the logical way to the inconsistent. CRC Press, Boca Raton
Zurück zum Zitat Priest G (2009) Dualising intuitionistic negation. Principia 13(2):165–184CrossRef Priest G (2009) Dualising intuitionistic negation. Principia 13(2):165–184CrossRef
Zurück zum Zitat Rasiowa H (1974) An algebraic approach to non-classical logics. North-Holland, AmsterdamMATH Rasiowa H (1974) An algebraic approach to non-classical logics. North-Holland, AmsterdamMATH
Zurück zum Zitat Rauszer C (1974) Semi-boolean algebras and their application to intuitionistic logic with dual operators. Fundamenta Mathematicae 85:219–249MathSciNet Rauszer C (1974) Semi-boolean algebras and their application to intuitionistic logic with dual operators. Fundamenta Mathematicae 85:219–249MathSciNet
Zurück zum Zitat Skolem TA (1970) Untersuchungen über die Axiome des Klassenkalküls und über Produktations- und Summationsprobleme, welche gewisse Klassen von Aussagen betreffen. Skrifter utgit av Videnskabsselskapet i Kristiania 3, 1919 [Reprinted Skolem T. Selected works in logic. In: Fenstad JE (ed.) Universitetsforlaget] Skolem TA (1970) Untersuchungen über die Axiome des Klassenkalküls und über Produktations- und Summationsprobleme, welche gewisse Klassen von Aussagen betreffen. Skrifter utgit av Videnskabsselskapet i Kristiania 3, 1919 [Reprinted Skolem T. Selected works in logic. In: Fenstad JE (ed.) Universitetsforlaget]
Metadaten
Titel
Paraconsistency properties in degree-preserving fuzzy logics
verfasst von
Rodolfo Ertola
Francesc Esteva
Tommaso Flaminio
Lluís Godo
Carles Noguera
Publikationsdatum
01.03.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
Soft Computing / Ausgabe 3/2015
Print ISSN: 1432-7643
Elektronische ISSN: 1433-7479
DOI
https://doi.org/10.1007/s00500-014-1489-0

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