Which fallacy is indicated by the assumption that because one situation is true for a part, it must be true for the whole?

The assumption that what is true for a part must also be true for the whole is known as the Division fallacy. This fallacy occurs when someone draws a conclusion based on a characteristic of a part or a member of a group and incorrectly applies that characteristic to the entire group. For example, if one were to argue that because a specific athlete on a team is skilled, then the entire team must also be skilled, this would be an instance of the Division fallacy.

This reasoning overlooks the possibility that the overall quality of the team could be composed of varying skill levels. Understanding this distinction is crucial in evaluating arguments, as it highlights the importance of not making assumptions about the whole based solely on the attributes of its individual parts.