Overgeneralization is a logical fallacy in which the author makes a claim that is so broad it cannot be proved or disproved. In most cases, overgeneralization occurs when the author wants to create an illusion of authority, or when he is using sensational language to sway the opinion of the reader. For instance, in the sentence “Everybody knows that she is a terrible teacher,” the author makes an assumption that cannot really be believed. This kind of statement is made when the author wants to create the illusion of consensus when none actually exists: it may be that most people have a negative view of the teacher, but to say that everybody feels that way is an exaggeration. When a reader spots overgeneralization, she should become skeptical about the argument that is being made, because an author will often try to hide a weak or unsupported assertion behind authoritative language.


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Last updated: 12/18/2017
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