Universality of state-independent violation of correlation inequalities   for noncontextual theories
  We show that the state-independent violation of inequalities for noncontextual hidden variable theories introduced in [Phys. Rev. Lett. 101, 210401 (2008)] is universal, i.e., occurs for any quantum mechanical system in which noncontextuality is meaningful. We describe a method to obtain state-independent violations for any system of dimension d > 2. This universality proves that, according to quantum mechanics, there are no "classical" states. 
Piotr Badziag, Ingemar Bengtsson, Adan Cabello, Itamar Pitowsky