tearing up Tate Modern

Entry into Turbine Hall walks you right up to Doris Salcedo's Shibboleth. A scraggly line cuts into the cement foundation, lines it with wire mesh, and "asks questions about the interaction of sculpture and space, about architecture and the values it enshrines, and about the shaky ideological foundations on which Western notions of modernity are built."

A canvas divides into four quadrants, all of the same room with the same furnishings in the same place. In the first square, a man smokes a pipe and reads a paper. In the other three, the room is empty. Rooms created and decorated for a purpose that takes up one twenty-fourth of a day.

Pablo Picasso's Girl in Chemise captures insolence in adolescence.