Taking "Fair Use" to the extreme

Fascinating and frightening story in the Chronicle, "Fending Off a Plagiarist", about an academic that discovers that another scholar has copied his dissertation. It is absolutely astonishing that the plagiarist imagined that he would ever get away with such a blatant deception. And as the writer of the article wonders, what does this say about the process of supervision that the doctoral candidate went through? How could a diligent supervisor or department let this slip through unnoticed?