ABSTRACT
Certain reasoning errors, or fallacies, are especially common. Being aware of those particular errors should help us guard against them. Some of the reasons seem to be much more relevant to the belief and thus provide more substantive support for it than do others. Thus, another type of reasoning fallacy involves supporting a belief with irrelevant evidence or with evidence that is only marginally relevant to that belief. A common reasoning fallacy that is encountered in everyday life is that of overgeneralization, or what might be called the problem of imputing to a class the characteristics of one or a few of its members.
