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How to ThinkIn the Age of AI
Definitionv1DF-141

Overconfidence

the systematic, predictable, measurable error where humans exhibit excessive confidence in their knowledge, estimates, and performance, characterized by three distinct forms—overestimation of actual performance, overplacement relative to others, and overprecision of confidence intervals—that behave differently across task difficulty levels and operate below the surface of conscious awareness

Why This Is a Definition

This definition precisely establishes the semantic boundary of 'overconfidence' by naming the term, identifying its genus as a calibration error, and stating its differentia through the three specific forms (overestimation, overplacement, overprecision) and its operational characteristics (systematic, predictable, measurable, below conscious awareness). It distinguishes overconfidence from other biases and provides the precise conceptual boundary needed for the curriculum's framework.

Source Lessons

Overconfidence is the default calibration error

Your brain does not fail randomly. It fails in a specific, measurable, predictable direction: too much confidence. Across decades of research, in every population tested, the dominant calibration error is overconfidence — believing you know more than you do, that your estimates are more precise than they are, and that your performance exceeds what it actually achieves.

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