Final answer:
An informal fallacy is a lapse of logical reasoning that can lead to a flawed argument. Examples of informal fallacies include hasty generalizations, circular arguments, and appeals to emotions.
Step-by-step explanation:
An informal fallacy is a lapse of logical reasoning that can lead to a flawed argument. It occurs when the arguer presents evidence that is not relevant for logically establishing their conclusion.
Some examples of informal fallacies include hasty generalizations, circular arguments, and appeals to emotions. These fallacies can weaken the validity of an argument and make it less persuasive.