1. A non-transitory computer readable storage medium, comprising executable instructions to: associate two or more data sets with two or more vertices in a Venn graph; associate an intersection of the two or more data sets with a vertex in the Venn graph; and associate a plurality of outliers between the two or more data sets and the intersection of the two or more data sets with a plurality of vertices disposed between the two or more vertices and the vertex in the Venn graph, wherein the plurality of outliers includes members of the two or more data sets that are not in the intersection of the two or more data sets.