A logical fallacy is an error in reasoning that undermines the logic of an argument. It often occurs when the conclusion does not logically follow from the premises, leading to misleading or invalid arguments. Logical fallacies can be intentional or unintentional and are commonly found in debates, discussions, and persuasive writing. There are many types of logical fallacies, such as the straw man fallacy, where someone misrepresents an opponent's argument to make it easier to attack. Understanding these fallacies helps individuals critically evaluate arguments and improve their own reasoning skills.