Concept
Credibility
Credibility is the quality that makes an idea believed. The Heaths show it can be built without a title: through testable credentials the listener can verify themselves, concrete details a fabrication would not contain, and an admitted weakness.
Made to Stick asks how an idea earns belief when its source has no authority to lend it. The answers are practical. Testable credentials: instead of asking to be trusted, hand the listener a way to check — 'ask the bakery on the corner' — so that belief comes from their own verification rather than your standing. Concrete details: the specific, slightly odd, checkable particular that a fabricated story would not include; juries believe the witness who remembers the toothbrush on the sink. Human-scale statistics: a number translated into something a person can picture. And the anti-authority: the ordinary person whose experience contradicts the official line, such as a smoker with emphysema in an anti-smoking advertisement. Cialdini's contribution from the other direction is the admitted weakness: an expert who concedes a limit is believed about the rest, and one who concedes nothing is suspected of selling. Credibility built this way survives the discovery that you have no title, because it never rested on one.
A real-life example
A twenty-six-year-old engineer needs a factory owner in Gaziantep to change a production schedule. He does not mention his degree. He brings one page of the factory's own downtime data, names the one shift where his plan would have hurt, and asks the owner to check the numbers himself. Two days later the owner calls back and agrees.
How to use it
- 1Give the listener something they can verify themselves; their own check is worth more than your credentials.
- 2Include the specific, odd, checkable detail; it is what a made-up story lacks.
- 3Say the weakness of your proposal before anyone asks, and mean it.