Overconfidence

People are systematically more confident in their judgments and forecasts than accuracy warrants. Subjective certainty reflects the coherence of the story they have constructed, not the evidence or their actual track record.

Why it Matters

Overconfidence drives bad forecasts, unheeded risk, and the illusion that experts can predict the unpredictable. Confidence and accuracy come apart, especially in low-validity, uncertain environments.

Signals

• Narrow estimates that turn out wrong far more often than predicted.
• Experts confidently forecasting in domains with poor feedback.
• No track record kept, so calibration is never checked.

Benefits

Recognizing it argues for ranges over point estimates, outside views, and humility where feedback is weak.

Risks

Betting on confident predictions in unpredictable domains; mistaking the feeling of knowing for knowledge.

Tensions

Confidence is socially rewarded and often required to act, yet it is a poor guide to accuracy.

Examples

An analyst sure of a forecast that random chance would beat; a planner certain of a date that slips badly.