As do those in any number of professions including law, business, and teaching, historians frequently begin with data that can be both extensive in quantity and contradictory in quality, and so must d...As do those in any number of professions including law, business, and teaching, historians frequently begin with data that can be both extensive in quantity and contradictory in quality, and so must determine what is most important; they have to resolve contradictions and ultimately tell a coherent story, one that their audiences find compelling and meaningful.