The title of a popular book several years ago proclaimed that “All I need to know I learned in kindergarten.” Some lawyers swear by a variation of that title, declaring that all they need to know they learned while preparing for the bar examination.

Of course, we do not endorse such glib views of the law. Most commercial lawyers, for example, know quite a bit about the substance of commercial law, especially the law of the state in which they practice (and in which they took the bar examination).