profiling and bad profiling. If we can effectively determine which is which, we stand to gain, not lose, a measure of justice.

Frederick Schauer is the David and Mary Harrison Distinguished Professor of Law at the University of Virginia and the author of Free Speech: A Philosophical Enquiry; Playing by the Rules; Profiles, Probabilities, and Stereotypes; Thinking Like a Lawyer; and The Force of Law. He is a Fellow of the British Academy and of the American Academy of Arts and Sciences, was the Frank Stanton Professor of the First Amendment at Harvard University for twenty years, and was a founding editor of the journal Legal Theory.