Philosophy of Logic

Dead Logicians Society - Warwick university's very own logic society aiming to increase and stimulate interest in logic and philosophy of logic at the university. Offers news and events.
www.freewebs.com/deadlogicianssociety/

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.
plato.stanford.edu/entries/frege-logic/index.html

Humboldt State University: Argumentation and Critical Thinking Tutorial - Jay VerLinden's resource offering reviews and tests on important concepts in formal logic.
www.humboldt.edu/~act/HTML/

Logic - An online textbook by Garth Kemerling, explaining the basic elements of elementary logic at an undergraduate level.
www.philosophypages.com/lg/

Logic and Mathematics - Essay on the nature of logic and its relationship to the philosophy of mathematics, written by Stephen G. Simpson.
www.math.psu.edu/simpson/papers/philmath/

The Logic Course - An interactive course in formal logic, with tutorials and quizzes on critical thinking, truth-tables, and sentential.
www.thelogiccourse.com/

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.
www.hf.uio.no/filosofi/njpl/

Peirce's Logic - Article in the Stanford Encyclopaedia of Philosophy, by Eric Hammer.
plato.stanford.edu/entries/peirce-logic/

PHILOG - The Danish Network for Philosophical Logic and its Applications.
www.philog.ruc.dk/

Symbolic Logic - Online resources provided to supplement undergraduate course taught by Peter Suber. Good collection of handouts.
www.earlham.edu/~peters/courses/log/loghome.htm

Tips on Translating English into First-Order Logic - An introductory guide by Peter Suber.
www.earlham.edu/~peters/courses/log/transtip.htm

Why Aristotelian Logic does not Work - An essay at Abelard.org outlining an argument against Aristotelian syllogistic.
www.abelard.org/category/category.htm