[2] For example, one may generalize about all people or all members of a group from what one knows about just one or a few people: Expressed in more precise philosophical language, a fallacy of defective induction is a conclusion that has been made on the basis of weak premises, or one which is not justified by sufficient or unbiased evidence.
[3] Unlike fallacies of relevance, in fallacies of defective induction, the premises are related to the conclusions, yet only weakly buttress the conclusions, hence a faulty generalization is produced.
The essence of this inductive fallacy lies on the overestimation of an argument based on insufficiently large samples under an implied margin of error.
[3] Faulty generalization is also a mode of thinking that takes the experiences of one person or one group, and incorrectly extends it to another.
[9] When evidence is intentionally excluded to bias the result, the fallacy of exclusion—a form of selection bias—is said to be involved.