Results 51 to 60 of about 87,429 (211)

On the Possibility of a General Purge of Self-Reference

open access: yesAnálisis Filosófico, 2012
My aim in this paper is to gather some evident in favor of the view that a general purge of self-reference is possible. I do this by considering a modal-epistemic version of the Liar Paradox introduced by Roy Cook.
Lucas Rosenblatt
doaj   +1 more source

A modal logic amalgam of classical and intuitionistic propositional logic

open access: yes, 2015
A famous result, conjectured by G\"odel in 1932 and proved by McKinsey and Tarski in 1948, says that $\varphi$ is a theorem of intuitionistic propositional logic IPC iff its G\"odel-translation $\varphi'$ is a theorem of modal logic S4. In this paper, we
Lewitzka, Steffen
core   +1 more source

Gestalt Shifts in the Liar Or Why KT4M Is the Logic of Semantic Modalities [PDF]

open access: yes, 2017
: This chapter offers a revenge-free solution to the liar paradox (at the centre of which is the notion of Gestalt shift) and presents a formal representation of truth in, or for, a natural language like English, which proposes to show both why -- and ...
Bobzien, Susanne
core   +1 more source

Semantic Tableau Versions of Some Normal Modal Systems with Propositional Quantifiers

open access: yesOrganon F, 2019
In Symbolic Logic (1932), C. I. Lewis developed five modal systems S1 − S5. S4 and S5 are so-called normal modal systems. Since Lewis and Langford’s pioneering work many other systems of this kind have been investigated, among them the 32 systems that ...
Daniel Rönnedal
doaj   +1 more source

Multiple Conclusion Rules in Logics with the Disjunction Property

open access: yes, 2015
We prove that for the intermediate logics with the disjunction property any basis of admissible rules can be reduced to a basis of admissible m-rules (multiple-conclusion rules), and every basis of admissible m-rules can be reduced to a basis of ...
A Chagrov   +31 more
core   +1 more source

A Van Benthem Characterization Result for Distribution-Free Logics

open access: yesLogics
This article contributes to recent results in the model theory of distribution-free logics (which include a Goldblatt-Thomason theorem and a development of their Sahlqvist theory) by lifting van Benthem’s characterization result for modal logic to the ...
Chrysafis Hartonas
doaj   +1 more source

General normal forms for any additive logic

open access: yes, 2017
In this article, we define general normal forms for any logic that has propositional part and whose non-propositional connectives distribute over the finite disjunctions.
Khaled, Mohamed
core   +1 more source

Logics with Impossibility as the Negation and Regular Extensions of the Deontic Logic D2 [PDF]

open access: yes, 2017
In [1] J.-Y. Bèziau formulated a logic called Z. Bèziau’s idea was generalized independently in [6] and [7]. A family of logics to which Z belongs is denoted in [7] by K.
Mruczek-Nasieniewska, Krystyna   +1 more
core   +1 more source

Proof search and counter-model construction for bi-intuitionistic propositional logic with labelled sequents [PDF]

open access: yes, 2009
Bi-intuitionistic logic is a conservative extension of intuitionistic logic with a connective dual to implication, called exclusion. We present a sound and complete cut-free labelled sequent calculus for bi-intuitionistic propositional logic ...
Pinto, Luís F., Uustalu, Tarmo
core   +1 more source

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