One of the greatest characteristics of the Jewish people is the dual streams of example and exposition in our heritage. Not only do we have primary sources in our oldest, holiest texts, we also have layer upon layer of commentary, questions, answers, and extrapolation on everything from the very nature of God to the intricacies of property ownership or public education. It is a feature of this kind of learning that we find and trace sources for everything from translation to tradition, from c...