You are reading this because someone -- possibly me -- has pointed it out in the course of a discussion that can only be advanced with the application of logic.
By my lights, a few web pages stand out as beacons of reason in an increasingly illogical Internet, and I present them below:
Wikipedia.com entry on Cognitive Distortionsand
"Logic & Fallacies: Constructing a Logical Argument"
An Introduction to Critical Thinking
An Introduction to Science
Hopefully these will be a good start for folks learning about the application of logic to their arguments.-Scott