Understanding the Logical Fallacy of Hasty Generalization with UML Diagrams

Kacper Bąk
2 min readMay 12, 2023

Hello, dear readers,

Today, we’re diving into the world of logic, specifically focusing on a common logical fallacy known as hasty generalization. This fallacy, while often unintentional, can lead to incorrect conclusions and foster misconceptions. To aid our understanding, we’ll be using UML (Unified Modeling Language) diagrams to graphically represent the fallacy.

Hasty Generalization: An Overview

A hasty generalization is a logical fallacy that involves reaching a generalized conclusion based on insufficient or unrepresentative data. It’s when we take one or a few instances and extrapolate a rule that applies to a broader set.

For example, if you meet three people from a specific country, all of whom are exceptionally intelligent, and you conclude that all people from that country must be intelligent, you’ve committed a hasty generalization. Here, the sample size is too small to justify such a sweeping assertion.

The UML Representation

Now, let’s illustrate this fallacy using UML diagrams, a standard method of visualizing the design of a system.

Imagine a UML Class Diagram. The “Person” class has subclasses like “American”, “British”, “Chinese”, etc., and one of the attributes of the “Person” class is “intelligence”. Let’s say we have instances of the “American” class, and all of them have…