Commencement speakers, business leaders, and the popular press tell us that failure has at least one benefit: It fuels success. Does it? Across 11 studies, including a field study of medical professionals, predictors overestimated the rate at which people course correct following failure (Studies 1-4). Predictors overestimated the likelihood that professionals who fail a professional exam (e.g., the bar exam, the medical boards) pass a retest (Studies 1a, 1b, and 2a), the likelihood that patients improve their health after a crisis (e.g., heart attack, drug overdose; Studies 2b and 6), and the probability, more generally, of learning from one's mistakes (Studies 3-5). This effect was specific to overestimating success following failure (Study 4) and erasing mention of an initial failure that had actually occurred corrected the problem (Studies 2a and 2b). The success overestimate was due, at least in part, to the belief that people attend to failure more than they do (Studies 5 and 6). Correcting this overestimate had policy implications. Citizens apprised of the sobering true rate of postfailure success increased their support for rehabilitative initiatives aimed at helping struggling populations (e.g., people with addiction, ex-convicts) learn from past mistakes (Studies 7a-7c). (PsycInfo Database Record (c) 2024 APA, all rights reserved).