According to conventional wisdom, when a court rules a statutory provision unconstitutional, it must sever that provision or strike down the entire statute. This understanding is incomplete. In practice, courts may engage in compound severance: invalidating additional, otherwise constitutional provisions of the statute without striking down the entire statute. They reason that the degree of interrelation between those provisions is so significant that severance of one compels severance of the other. As a result, a subset of the statute remains law. The power to craft such subsets raises constitutional concerns, and yet the jurisprudence concerning statutory interdependence is inconsistent and unclear. Courts analyze provisions for interdepe...