Heuristics

Fast Rules of Thumb

Heuristics are fast rules of thumb. They are not always bad, but they can make rare events feel common or simple stories feel true.

Why this Category Matters

A quick shortcut can help under pressure, but you need to know when to slow down and double-check.

Inside this Topic

2 lesson pages and 2 comparison links currently live in this section.

How it Differs

Heuristics can be useful.

Biases are the tilted outcomes that often come from shortcuts.

Statistical errors happen when a shortcut ignores the numbers.

Featured Examples

Availability Heuristic

If I Can Recall It Fast, It Feels Common

Fast Rules of Thumb

After seeing one dramatic story about a plane problem, a traveler feels flying is suddenly much riskier than driving.

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Familiarity Heuristic

If It Feels Familiar, It Feels Safer Or Truer

Fast Rules of Thumb

A person starts trusting a claim mainly because they have heard it again and again.

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Browse this topic

Availability Heuristic

If I Can Recall It Fast, It Feels Common

Fast Rules of Thumb

After seeing one dramatic story about a plane problem, a traveler feels flying is suddenly much riskier than driving.

Learn this bug

Familiarity Heuristic

If It Feels Familiar, It Feels Safer Or Truer

Fast Rules of Thumb

A person starts trusting a claim mainly because they have heard it again and again.

Learn this bug

Common Warning Signs

A vivid example feels stronger than the data.

Familiar things seem safer or better.

Beginner-Friendly Starting Points

Quick Examples

One dramatic story

A single vivid example makes a risk feel huge.

Practice this Topic

Use a short quiz or drill to check whether you can tell this category apart from nearby thinking traps.