Proofs and Refutations at David Zwirner
Francis Alÿs, Trisha Brown, André Cadere, VALIE EXPORT, Henry Flynt, Simone Forti, Dan Graham, Georg Herold, Alfred Jensen, Lee Lozano, Man Ray, Bruce Nauman, Max Neuhaus, Adrian Piper, Sigmar Polke, R.H. Quaytman, Dorothea Rockburne, and Al Taylor.