A logical fallacy is an error in reasoning that leads to a flawed or illogical conclusion. It occurs when someone uses faulty logic, misleading evidence, or invalid arguments to support their point of view. Logical fallacies can be used intentionally or unintentionally and are often used by people who lack proper understanding of the topic they are discussing. Examples of logical fallacies include ad hominem attacks, false dilemma, straw man argument, and many others. Recognizing and avoiding these fallacies is an important skill in critical thinking and effective communication.