I spotted the following link on the website of the excellent podcast “Skeptics Guide to the Universe”.

http://www.theness.com/how-to-argue/

It’s a good discussion on many of the logical fallacies, as well as a discussion of the structure of a logical argument. What I wouldn’t give to have just 25% of the population conversant in critical thinking! (Forgive the hasty generalization I think it would turn the culture upside down.