In listening to discussions about discretion in the criminal process, one has the sense of sharply cut distinctions slipping toward a black hole in our language. All decisions by police, prosecutors, judges and jury are routinely called discretionary. This usage pervades respectable, basically sound papers. In a recent article in the Yale Law Journal, Goldstein and Marcus seek to demonstrate that discretion pervades the decisions of French, German and Italian prosecutors. They write: Claims that prosecutorial discretion has been eliminated, or is supervised closely, are exaggerated. Discretion is exercised in each of the systems [French, German and Italian] for reasons similar to those supporting it in the United States. In an article app...