My 5-year-old nephew once confidently told me that all dinosaurs were green because his three dinosaur toys were green. So I showed him a nature documentary, Walking with Dinosaurs, and suddenly, ...

A fallacy is some kind of defect in an argument, whether unintended or intended (with the aim to deceive). A formal fallacy is a deductive argument with an invalid form, such as the one above: The ...

"I strongly object to wrong arguments on the right side," said GK Chesterton. "I think I object to them more than to the wrong arguments on the wrong side." Arguments are attempts to persuade by ...