Anglo-American authors have paid little attention to a subtle distinction that has important jurisprudential implications. It is the distinction between sources of law and the legal norms which can be derived from sources by means of interpretation. The distinction might also be rendered as a threefold one, separating sources of law from legal norms and both of these from that which mediates their relation, namely, methods of legal interpretation. This paper intends to state the “source-norm” distinction clearly and to give (...) examples of jurisprudential insights that are missed, and mistakes that may be made if the distinction is not given its due. (shrink)