Courtesy Bias

You're seeing it when customer interviews produce overwhelmingly positive feedback, but actual usage metrics tell a different story. People said they loved the feature; the data shows they never use it. Courtesy filled the gap between politeness and truth.

You're seeing it when a founder asks the team "What do you think of this idea?" and receives only agreement — not because the idea is flawless, but because disagreeing with the founder feels socially risky.

You're seeing it when reference checks produce uniformly positive assessments. Former colleagues are reluctant to share genuine concerns about a candidate, so they default to polite, vaguely positive statements that reveal nothing.

Never trust face-to-face feedback at face value. Build systems that reveal truth: watch what people do, not what they say. Use anonymous channels for internal feedback. In customer research, observe behaviour rather than asking opinions. When you do ask directly, make it psychologically safe to disagree — and assume the negative feedback you do receive is the tip of a much larger iceberg.

Catmull built Pixar's Braintrust specifically to defeat courtesy bias. Traditional studio feedback was corrupted by hierarchy and politeness — people told directors what they wanted to hear. The Braintrust inverted this by establishing explicit norms: feedback must be candid, focused on the work not the person, and no one has authority to mandate changes. Catmull recognised that even talented, well-intentioned people default to courtesy when the social stakes are high, so the system had to structurally lower those stakes. He separated feedback from authority — you could say anything about the film, but the director retained final decision-making power. For founders, Catmull demonstrates that overcoming courtesy bias requires structural design, not just cultural aspiration. You must build systems where honesty is safer than politeness.