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Fuzzy sets and fuzzy logic: theory and applications
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Beyond two
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Fuzzy Sets and Systems
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Fuzzy Sets and Systems
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Fuzzy Sets and Systems
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Fuzzy Sets and Systems
Fuzzy Sets and Systems
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Fuzzy Sets and Systems
Relational compositions in Fuzzy Class Theory
Fuzzy Sets and Systems
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ECSQARU '09 Proceedings of the 10th European Conference on Symbolic and Quantitative Approaches to Reasoning with Uncertainty
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Fuzzy Sets and Systems
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Mathematical and Computer Modelling: An International Journal
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Fuzzy Sets and Systems
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In three case studies on notions of fuzzy logic and fuzzy set theory (Dubois-Prade's gradual elements, the entropy of a fuzzy set, and aggregation operators), the paper exemplifies methodological differences between traditional and deductive fuzzy logic. While traditional fuzzy logic admits various interpretations of membership degrees, deductive fuzzy logic always interprets them as degrees of truth preserved under inference. The latter fact imposes several constraints on systems of deductive fuzzy logic, which need not be followed by mainstream fuzzy logic. That makes deductive fuzzy logic a specific area of research that can be characterized both methodologically (by constraints on meaningful definitions) and formally (as a specific class of logical systems). An analysis of the relationship between deductive and traditional fuzzy logic is offered.