Hasty Generalization
Drawing a broad conclusion from a small, unrepresentative, or anecdotal sample. Also called “jumping to conclusions” or “converse accident.”
Examples
- “My grandfather smoked three packs a day and lived to 90. Smoking isn’t that bad.”
- “I met two rude people from City X. Everyone from City X is rude.”
- “This new hire was lazy. The whole generation has no work ethic.”
- “I tried that restaurant once and it was bad. It’s a terrible restaurant.”
- “Three studies show X. Therefore X is definitely true.” (ignoring 50 studies showing not-X)
Why It Happens
- Availability heuristic: vivid/memorable examples feel more representative
- Confirmation bias: we notice examples that fit our belief
- Small sample sizes have high variance
- Anecdotes feel more “real” than statistics
How to Counter
- “What’s the sample size? Is it representative?”
- “Are there systematic studies on this?”
- “Could these examples be outliers?”
- “What would a fair test of this claim look like?”