I didn't think Duke was above ND.
I actually put Northwestern below ND in my mind, but after I looked it up, I did remember that it was the only Big 10 school higher ranked than ND. I guess I moved them down a few notches after that one professor of theirs had a prostitute come to class and perform sex acts during class.
US News & World Report Rankings:
6 Chicago
6 Penn
9 Northwestern
10 Duke
15 Notre Dame
25 Michigan
57 Purdue
79 Indiana