A great piece from The Onion, inside the mind of someone arguing emotionally: Oh, No! It's Making Well-Reasoned Arguments Backed With Facts! Run!
the problem with this sort of thing is that no one ever thinks that they're the ones being irrational. things like confirmation bias in particular lead people to think that they're making well reasoned arguments backed with facts.
Actually, I more highly recommend this:
Boy with freakish brain wins spelling bee
'tis a fine link, but you should just link, not reproduce the text of the article. Copyright issues, Google detecting spam blog issues. I've taken the liberty of editing, hope you don't mind.