18. The apparatus of claim 14 , wherein each person's corresponding feature vector further comprises: a set of wrongness features derived from correlation of the electronic content item with one or more other content items known to not reference the person.
18. The apparatus of claim 14 , wherein each person's corresponding feature vector further comprises: a set of wrongness features derived from correlation of the electronic content item with one or more other content items known to not reference the person. 19. The apparatus of claim 18 , wherein the set of wrongness features comprises: a measure of similarity between the electronic content item and at least one other electronic content item known to not reference the person.