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Relevant Logics

open access: yes, 2019
Abstract Relevant logics aim to avoid the ‘paradoxes’ of the material and strict conditionals. Their most natural semantics, the Routley-Meyer semantics, is given in terms of impossible worlds. By placing certain further conditions on those worlds, we can obtain stronger relevant logics.
Francesco Berto   +2 more
exaly   +2 more sources

The (Greatest) Fragment of Classical Logic that Respects the Variable-Sharing Principle (in the FMLA-FMLA Framework)

open access: yesBulletin of the Section of Logic, 2021
We examine the set of formula-to-formula valid inferences of Classical Logic, where the premise and the conclusion share at least a propositional variable in common. We review the fact, already proved in the literature, that such a system is identical to
Damian E. Szmuc
doaj   +1 more source

Ternary Relational Semantics for the Variants of BN4 and E4 which Contain Routley and Meyer's Logic B

open access: yesBulletin of the Section of Logic, 2022
Six interesting variants of the logics BN4 and E4—which can be considered as the 4-valued logics of the relevant conditional and (relevant) entailment, respectively—were previously developed in the literature.
Sandra M. López
doaj   +1 more source

The Weak Variable Sharing Property

open access: yesBulletin of the Section of Logic, 2023
An algebraic type of structure is shown forth which is such that if it is a characteristic matrix for a logic, then that logic satisfies Meyer's weak variable sharing property.
Tore Fjetland Øgaard
doaj   +1 more source

A Novel of Domination in Neutrosophic Over Graphs [PDF]

open access: yesNeutrosophic Sets and Systems, 2023
The degree of data uncertainty may be measured using a variety of mathematical techniques, but neutrosophic logic is a potent instrument for analysis when compared to fuzzy and intuitionistic fuzzy logics.
R. Narmada Devi, M. Meenu, G. Muthumari
doaj   +1 more source

The Good, the Bad and the Right: Formal Reductions among Deontic Concepts

open access: yesBulletin of the Section of Logic, 2021
The present article provides a taxonomic analysis of bimodal logics of normative ideality and normative awfulness, two notions whose meaning is here explained in terms of the moral values pursued by a given community.
Daniela Glavaničová, Matteo Pascucci
doaj   +1 more source

Lindstrom theorems for fragments of first-order logic [PDF]

open access: yesLogical Methods in Computer Science, 2009
Lindstr\"om theorems characterize logics in terms of model-theoretic conditions such as Compactness and the L\"owenheim-Skolem property. Most existing characterizations of this kind concern extensions of first-order logic.
Johan van Benthem   +2 more
doaj   +1 more source

LogicNet: probabilistic continuous logics in reconstructing gene regulatory networks

open access: yesBMC Bioinformatics, 2020
Background Gene Regulatory Networks (GRNs) have been previously studied by using Boolean/multi-state logics. While the gene expression values are usually scaled into the range [0, 1], these GRN inference methods apply a threshold to discretize the data ...
Seyed Amir Malekpour   +2 more
doaj   +1 more source

SUBSTITUTION IN RELEVANT LOGICS [PDF]

open access: yesThe Review of Symbolic Logic, 2019
AbstractThis essay discusses rules and semantic clauses relating to Substitution—Leibniz’s law in the conjunctive-implicational form $s\dot{ = }t \wedge A\left( s \right) \to A\left( t \right)$—as these are put forward in Priest’s books In Contradiction and An Introduction to Non-Classical Logic: From If to Is. The stated rules and clauses are shown to
openaire   +4 more sources

Nicolai Vasiliev’s Imaginary Logic and Semantic Foundations for the Logic of Assent

open access: yesPhilosophia Scientiæ, 2014
The Russian philosopher Nicolai Vasiliev is known as a forerunner of substantially non-classical logics, i.e., logics that differ from classical logic by dropping principles that are sound in classical logic.
Werner Stelzner
doaj   +1 more source

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