Conditionals and Entailment
(7)
Contradiction and Inconsistency
(5)
Identity
(6)
Informal Logic
(16)
Logic and Knowledge
(4)
Logic and Ontology
(6)
Paradoxes
(14)
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Philosophers
(2)
Problem of Induction
(6)
Semantics of Logic
(7)
Truth Definitions
(10)
Vagueness
(12)
Frege's Theorem
Article in the Stanford Encylcopaedia of Philosophy, entitled `Frege's Logic, Theorem, and Foundations for Arithmetic'. Discusses the 1980 discovery of Crispin Wright that Frege's work of the Grundgesetze can be carried out in second-order logic with Hume's principle.
Peirce's Logic
Article in the Stanford Encyclopaedia of Philosophy, by Eric Hammer.
Why Aristotelian Logic does not Work
An essay at Abelard.org outlining an argument against Aristotelian syllogistic.
Philosophical Logic
Introductory article by E. J. Loewe.
Symbolic Logic
Online resources provided to supplement undergraduate course taught by Peter Suber. Good collection of handouts.
Tips on Translating English into First-Order Logic
An introductory guide by Peter Suber.
Nordic Journal of Philosophical Logic (NJPL)
Edited at Dep. of Philosophy, Univ. of Oslo, published by Scandinavian U.P. in hard copy and on WWW. Full-text Web edition free for personal use.
Humboldt State University: Argumentation and Critical Thinking Tutorial
Jay VerLinden's resource offering reviews and tests on important concepts in formal logic.
Logic and Mathematics
Essay on the nature of logic and its relationship to the philosophy of mathematics, written by Stephen G. Simpson.
PHILOG
The Danish Network for Philosophical Logic and its Applications.
Logic
An online textbook by Garth Kemerling, explaining the basic elements of elementary logic at an undergraduate level.
The Logic Course
An interactive course in formal logic, with tutorials and quizzes on critical thinking, truth-tables, and sentential.
The Troublesome Paradox
Online version of book seeking publication by Per Lundgren. Author attempts to argue that a consequence of Goedel's incompleteness theorem is that we should overturn our current approach to scientific method.
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