For twenty-four years, John Gruber has built Daring Fireball on the premise that careful attention to truth is its own form of integrity. Yesterday, that premise was tested when a developer he trusted led him to publish a criticism of Apple that turned out to be unfounded — the App Store had correctly rejected an astrology app, not wrongly rejected an astronomy one. Gruber's first retraction in a quarter century is less a story about a mistake than about how trust, once extended, can be weaponized through silence as much as through lies.