Comment on "Circumstantial Evidence for Critical Behavior in Peripheral   Au+Au Collisions at 35 MeV/nucleon"
  Mastinu et al. recently reported the observation of several positive signals possibly indicating critical behavior in peripheral collisions of Au+Au at $E/A$=35 MeV. In our comment, we examine the choice of variables used to determine the presence (or absence) of critical behavior. We do this by repeating the analysis the work of Mastinu et al. on "data" from a simulation with no critical behavior. 
L. Phair, Th. Rubehn, L.G. Moretto, G.J. Wozniak (Lawrence Berkeley   National Laboratory)