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Logic and Philosophy of Logic (Edited by Aleksandra Samonek, PhilPapers)
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logic : a science that deals with the principles and criteria of validity of inference and demonstration — Webster See also OneLook, Free Dictionary, Wiktionary, Urban Dictionary
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Roget’s II (Thesaurus.com), MerriamWebster Thesaurus, Visuwords
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Glossary of FirstOrder Logic (Peter Suber, Earlham College)
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Logic is the formal systematic study of the principles of valid inference and correct reasoning. Logic is used in most intellectual activities, but is studied primarily in the disciplines of philosophy, mathematics, semantics, and computer science. Logic examines general forms which arguments may take, which forms are valid, and which are fallacies. In philosophy, the study of logic figures in most major areas: epistemology, ethics, metaphysics. In mathematics, it is the study of valid inferences within some formal language. — Wikipedia (Categories, Index of Articles)
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Introduction
Logic (Garth Kemerling, Philosophy Pages)
What is Logic? (Steve Palmquist, Hong Kong Baptist University)
Factasia: Logic (R.B. Jones)
Logic: Finding The Right Patterns (Andrea Borghini, About.com)
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The History of Logic from Aristotle to Gödel and Its Relationship with Ontology (Raul Corazzon)
The Oxford Companion to Philosophy (Peter King & Stewart Shapiro)
The history of formal mathematical, logical, linguistic, and methodological ideas (Dictionary of the History of Ideas)
History of Logic (Wikipedia)
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Logic (Sundar Sarukkai, Oxford Bibliographies)
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A crash course in formal logic (YouTube Channel)
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Journal of Philosophical Logic (Association for Symbolic Logic)
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OEDILF: The Omnificent English Dictionary In Limerick Form
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Latest Results The latest content available from Springer

Partial Semantics for Quantified Modal Logic
on May 8, 2018 at 12:00 am
Abstract When it comes to Kripkestyle semantics for quantified modal logic, there’s a choice to be made concerning the interpretation of the quantifiers. The simple approach is to let quantifiers range over all possible objects, not just objects existing in the world of evaluation, and use a special predicate to make claims about existence (an existence predicate). This is the constant domain approach. The more complicated approach is to assign a domain of objects to […]

Axiomatic Theories of Partial Ground I
on April 1, 2018 at 12:00 am
Abstract This is part one of a twopart paper, in which we develop an axiomatic theory of the relation of partial ground. The main novelty of the paper is the of use of a binary ground predicate rather than an operator to formalize ground. This allows us to connect theories of partial ground with axiomatic theories of truth. In this part of the paper, we develop an axiomatization of the relation of partial ground over the truths of arithmetic and show that the theory is a […]

Axiomatic Theories of Partial Ground II
on April 1, 2018 at 12:00 am
Abstract This is part two of a twopart paper in which we develop an axiomatic theory of the relation of partial ground. The main novelty of the paper is the of use of a binary ground predicate rather than an operator to formalize ground. In this part of the paper, we extend the base theory of the first part of the paper with hierarchically typed truthpredicates and principles about the interaction of partial ground and truth. We show that our theory is a […]

Stabilizing Quantum Disjunction
on March 13, 2018 at 12:00 am
Abstract Since the appearance of Prior’s tonk, inferentialists tried to formulate conditions that a collection of inference rules for a logical constant has to satisfy in order to succeed in conferring an acceptable meaning to it. Dummett proposed a pair of conditions, dubbed ‘harmony’ and ‘stability’ that have been cashed out in terms of the existence of certain transformations on natural deduction derivations called reductions and expansions. A […]

Exclusion Problems and the Cardinality of Logical...
on December 1, 2017 at 12:00 am
Abstract Wittgenstein’s atomist picture, as embodied in his Tractatus, is initially very appealing. However, it faces the famous colourexclusion problem. In this paper, I shall explain when the atomist picture can be defended (in principle) in the face of that problem; and, in the light of this, why the atomist picture should be rejected. I outline the atomist picture in Section 1. In Section 2, I present a very simple necessary and sufficient condition for […]