Volume 14 (2023)
Volume 13 (2022)
Volume 12 (2021)
Volume 11 (2020)
Volume 10 (2019)
Volume 9 (2018)
Volume 8 (2017)
Volume 7 (2016)
Volume 6 (2015)
Volume 5 (2014)
Volume 4 (2013)
Volume 3 (2012)
Volume 2 (2011)
Volume 1 (2010)

A Critical Pondering in Using Second-order Quantifier in Analyzing Cogent Conditional
Volume 2, Issue 1 , March 2011, , Pages 1-23

Abstract
  The current paper is an attempt to analyze the the Avicennian Cogent conditional quantifier based on Second-order Logic. Contemporary researchers have provided various formalizations of Avicennian conditionals to the Modern Logic language. A major difference between these formalizations is the analysis ...  Read More

Study and Critique of Some Definitions of the Concept of Conceivability

Mojtaba Amirkhanlou

Volume 2, Issue 2 , September 2011, , Pages 1-21

Abstract
  In the present article, I try to study, analyze, and criticize some definitions of the concept of conceivability. In this relatively historical study, I have put particular importance on Descartes as the representative of definitions involving "conceiving". Then, I have discussed definitions involving ...  Read More

Quine Versus Kripke

ali Akbar Ahmadi Afremjani; Ali Sadeghi Sadeghi

Volume 3, Issue 1 , March 2012, , Pages 1-25

Abstract
  We in this article beside of explaining Quine’s most well-known criticisms of modal logic, try to show that Quine’s rejection of modal logic, and his opposition with essentialism, which he maintains that results from modal logic, could be founded on his epistemology and his treatment of objects. ...  Read More

A logical Study on Ethical Dilemmas

Zinat Ayatollahi

Volume 3, Issue 2 , September 2012, , Pages 1-20

Abstract
  This research examines the relation between logic and ethics and tries to investigate logically the corresponding dilemmas. Standard Deontic Logic which is initially appeared for studying ethical propositions cannot offer a suitable and accurate solution for conflict between duties. Therefore some new ...  Read More

A Critique of the Paper "the Paradox of Informing from Absolute Unknown: Analyzing the Concept of ‘Information" ‘.

Mahdi Assadi

Volume 4, Issue 1 , March 2013, , Pages 1-43

Abstract
  The main purpose of this essay is to review and criticize the paper published earlier in this journal, Logical Study, titled ‘the Paradox of the informing from Absolute Unknown: Analyzing the Concept of information’ written by Sharifzadeh and Hodjati. In spite of having some useful points, ...  Read More

Necessity Transition in Aristotle’s Modal Logic;an Aristotelian View

Hamed Bastin

Volume 4, Issue 2 , September 2013, , Pages 1-17

Abstract
  One of the crucial problems concerning Aristotle's modal logic is the incompatibility of his claims about the necessity and his teachings in the case of absolute syllogism. This problem has led to many controversies since Aristotle time, and most researchers have come to the conclusion that Aristotle’s ...  Read More

The Roots of the Absolute Non-Existent Paradox in Greek Philosophy

Mehdi Asadi

Volume 5, Issue 1 , March 2014, , Pages 1-30

Abstract
    For Different thinkers, throughout history, ‘The unknowable non-existent’ has had different meanings. However, despite these differences, the ordinary absolute non-existent in Muslim philosophy (ma‘dūm muṭlaq; non-existent in both the external world and in the mind), can be ...  Read More

A Resolution to the Absolute Non–Existent Paradox

Mahdi Assadi

Volume 5, Issue 2 , September 2014, , Pages 1-30

Abstract
  external world and in the mind as well) paradox, so many solutions have been suggested: The difference in the intension and extension and its equivalent; the difference in the battī and lā–battī and its equivalent; and so forth. Having a glance at the incorrectness of these resolutions, the ...  Read More

Conflict of Frege and Hilbert; The Right Way to Deal with Meta-Theorems in Axiomatic Systems

Meysam Mohammad Amini

Volume 6, Issue 1 , March 2015, , Pages 1-19

Abstract
    In 1899, David Hilbert offers an articulated axiomatic system for Euclidean geometry and, demonstrating conditionally the meta-theorems of compatibility and independence for this system, proposes a solution to one of the enduring problems of mathematics (known as the problem of parallel lines). ...  Read More

External attribution of Secondary Intelligibles; The case study of Absolute Non–Existent Paradox

Mahdi Assadi

Volume 6, Issue 2 , September 2015, , Pages 1-36

Abstract
  In Islamic logic and philosophy usually is said, as a rule, that the attribution of logical secondary inteligibles is totally subjective. This paper shows that sometimes some Muslim thinkers, in practice, have violated this rule unintentionally, in the discussion of absolute non–existent paradox, ...  Read More

Traditional Logic
Review Attached Conditional Correlation in the Works of Muslim Logicians

Davoud Heydari

Volume 7, Issue 1 , August 2016, , Pages 1-29

Abstract
  Some logicians earlier logicians, especially as long as the correlation provided or paid for. And even an independent treatises have been written on the subject. In contrast, others argue considered useless or less useful. Unfortunately, this issue has been raised in later works or abbreviated or omitted ...  Read More

Philosophy of Language
The Concept of Representation in Millikan's Biosemantics Theory

Hamed Bastin; Seyyed Mohammad Ali Hodjati

Volume 7, Issue 2 , December 2016, , Pages 1-28

Abstract
  In answer to the Putnam problem about extensional non-determination of language terms, Millikan asks if this problem exists by a new definition of representation according to biological evidences, especially the principle of natural selection. The Millikan’s answer to this question is negative ...  Read More

Philosophy of Logic
Tolerance in ST-Theory
Volume 8, Issue 1 , April 2017, , Pages 1-13

Abstract
  Cobreros et al. (2012) developed a theory of vagueness in order to model tolerance principles coherently, in the sense that not everything falls under a vague predicate and no sorites paradox is valid. It is argued in this paper that their characterization of tolerance principles does not match with ...  Read More

Philosophy of Logic
Contextualism vs Minimalism in Semantics

Nima Ahmadi; Lotfollah Nabavi; Seyyed Mohammad Ali Hodjati

Volume 8, Issue 2 , November 2017, , Pages 1-23

Abstract
  Contextualism is the main opponent of minimalism. The debate between these two semantical approaches, stem in an old fashion dispute to determine the border between semantics and pragmatics. Contextualists claim that the sentences in the natural language are not truth-evaluable before being enriched ...  Read More

Is indicative conditionals non-truth functional?

Masoud Alvand

Volume 9, Issue 1 , October 2018, , Pages 1-17

Abstract
  The incompatibility between the connectives of natural language and the language of classical logic in the truth-functionality has led some to think that the language of classical logic is incapable of representing the natural language sentences and formulating the arguments of this language. This paper ...  Read More

The Groundability of Four Figures of Aristotelian’s Syllogism

Mohammad Hafi; Mahin Bagheri; Mehdi Mirzapour; Gholamreza Zakiani

Volume 9, Issue 2 , October 2018, , Pages 1-19

Abstract
  The purpose of this research is to provide a new concept in Aristotelian categorical syllogism which is called groundability. A valid mood is called groundable if one would derive all the 24 valid moods in the Aristotelian’s syllogism by assuming only the valid mood and applying a chain of the ...  Read More

Tense Forms of Moore's Paradox

Ruhollah Ebrahimpouresfahani; meghdad ghari

Volume 10, Issue 1 , October 2019, , Pages 1-32

https://doi.org/10.30465/lsj.2019.4489

Abstract
  Moore’s sentences are sentences of the form “p but I don't believe that p” or “p but I believe that not-p”. These sentences are called the omissive and the commissive form of Moorean sentence, respectively. These sentences might be true, yet they are ‘absurd’ ...  Read More

Study of Different Methods of Introducing Forcing

Mohammad Golshani; Omid Etesami; Shahram Mohsenipour

Volume 10, Issue 2 , May 2020, , Pages 1-12

https://doi.org/10.30465/lsj.2019.5266

Abstract
  Cohen’s method of forcing is one of the main tools in set theory for constructing models of ZFC. In this paper, we consider different methods of introducing forcing, and show that they are all equivalent. First we introduce the method of forcing using partial orders and state some of its basic ...  Read More

Allamah Tabataba'i's division of predication: A Critical Look

Hamidreza Badr

Volume 11, Issue 2 , February 2021, , Pages 1-28

https://doi.org/10.30465/lsj.2021.35758.1337

Abstract
  Allameh Tabatabai, in the definition of predication , considers predication an existential union between the subject and the predicate. In this union, the subject is an existence by itself and the predicate is a connective existence (towards the subject). Then on the division of prediction, he divides ...  Read More

Non-classical Comparative Logic I: Standard Categorical Logic – from SLe to IFLe

Amer Amikhteh; Seyyed Ahmad Mirsanei

Volume 12, Issue 1 , April 2021, , Pages 1-24

https://doi.org/10.30465/lsj.2021.35927.1349

Abstract
  In this paper, a non-classical axiomatic system was introduced to classify all moods of Aristotelian syllogisms, in addition to the axiom "Every a is an a" and the bilateral rules of obversion of E and O propositions. This system consists of only 2 definitions, 2 axioms, 1 rule of a premise, and moods ...  Read More

The Mental Existence, Memory and Complicated Arguments

Mahdi Assadi

Volume 12, Issue 2 , September 2021, , Pages 1-29

https://doi.org/10.30465/lsj.2022.39792.1386

Abstract
  Some objections to the mental existence that are proposed by the western philosophers are almost unknown to Muslim philosophers and therefore have not received flawless response yet. For example, the complicated formulae objection, being one of the most important and difficult of them, says that since ...  Read More

Vacuous proper name؛ pathway back from Copernican revolution

Masoud Jannati Fard Amoozgar

Volume 13, Issue 1 , August 2022, , Pages 1-21

https://doi.org/10.30465/lsj.2022.42731.1414

Abstract
  Kripke's method in be suspected on the sameness of metaphysics and epistemology is to introduce examples of violations; Introduction of a priori possible beside necessary experimental propositions. It is disputed in these counterexamples. What follows is an attempt to revive metaphysics through natural ...  Read More

Normative analysis of logical validity

Masoud Alvand

Volume 13, Issue 2 , February 2023, , Pages 1-21

https://doi.org/10.30465/lsj.2023.42421.1412

Abstract
  The main problem of this article is logical validity analysis. According to Field, the necessary condition for intertheoretic logical validity of an argument is normative restrictions on belief in the premises and conclusion of that argument. However, the traditional view is that lexically valid arguments ...  Read More

Vagueness and Sorites Paradox.

Davood Hosseini

Volume 1, Issue 1 , March 2010, , Pages 3-26

Abstract
  . The present paper attempts to introduce vagueness and Sorites paradox. First, the observational adequacy of the issue and then its logical form are presented. Later on, the philosophical matters concerning the theoretical framework of vagueness and its philosophy are discussed. Finally, the present ...  Read More

Hegelian Dilemma Investigation of the Relation Between “Phenomenology” and “Logic”

Ali Akbar Ahmadi Aframjani

Volume 1, Issue 2 , September 2010, , Pages 3-15

Abstract
  In this article we investigate the relation between two Hegel’s books “The Phenomenology of the Spirit [or Mind]” and “The Science of Logic”. We try to answer this question that which of these books is conceptually prior to and a basis for understanding the other? Does “The ...  Read More