The fall shows boasted more than a few tips of the mortarboard to academic dress: Tweeds and plaid, car coats, preppy jackets and Fair Isle sweaters. But one of the best tricks stolen from the ivory tower came in the form of the Oxford. The adapted brogue made an appearance at several shows, with two of the strongest versions showing up on the Marc Jacobs and Philip Lim runways. At Marc, the Oxford came out with a squared-off toe, a tall stack heel, and a zippered instep; the look was downtown bookish. Lim’s Oxford was sexier, black, olive and camel-colored suede slingbacks perched on a sharp stilettos, with some patent leather shine for added tone-on-tone impact. They’re too cool for school.