Philosophy 103 - Introduction to Logic: Critical Thinking

Course Related Links

Categorical Logic - An excellent overview of the basics by Wei-Ming Wu of Butte College, California. It is well worth downloading the plug-in to view this site.

Informal Fallacies - They're all here. Brought to you by Dr. Charles Ess.

Stephen's Guide to Logical Fallacies - by Stephen Downes. This is the best organized fallacy site I've found.

A Guide to the Fallacies - More fallacies from a course web site at Lincoln University, Canterbury, New Zealand.

Logic - by Garth Kemerling. This site is worthwhile for its comprehensive philosophy blurbs as well.

Proof Checker - by John Saetti. Includes an interactive tutorial on converting categorical propositions to their boolean and venn equivalents. A truth table calculator that can help with: truth functions, truth tables, truth tables for arguments, and indirect truth tables. And a proof checker and generator to help with natural deduction in propositional logic.

Venn Diagrams - by Donald Nute, University of Georgia. How to make and read Venn Diagrams.

Lewis Carroll's Logic Game - Check it out. Its cool (and informative).