The posthumous condemnation of Cyril Burt destroyed his reputation and undermined his life's work on the genetic nature of differences in intelligence. Whether Burt falsified research findings or not, the real significance of the affair lies in what it teaches about scientific methodology and the fallibility of personal judgments. (SLD)

The author recounts his experiences investigating alleged fraud by Cyril Burt (1976) in his work on the genetic foundations of human intelligence. The evidence fails to prove Burt guilty, and his assertions about the genetic factors of individual differences in intelligence are finding corroboration in contemporary psychology. (SLD)