Philip Tetlock, a professor at the Wharton School of the University of Pennsylvania, has helped a generation of forecasters hone their prediction skills. At the university’s Good Judgment Project, Tetlock worked alongside his wife and research partner Barbara Mellers to form a team of forecasters so accurate that they outperformed intelligence analysts who had access to classified data. He and journalist Dan Gardner were co-authors of an influential New York Times bestseller, Superforecasting: The Art and Science of Prediction. For this article, Tetlock agreed to field questions about adversarial collaboration, a process that creates solid predictions by combining differing views.

Where is adversarial collaboration used, and where...

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