This curator’s choice, from The Museum of Modern Art chosen by curator Paola Antonelli, argues that design is not always pretty. In fact, sometimes it is blunt or aggressive — especially when it is meant to deliver a clear message or depart from tradition and express new ideas. The exhibition “Rough Cut” presents a selection of bold designs from MoMA’s collection. It may not be pretty, but when it is good, it can be powerful and beautiful.