  Numerical results suggest that the quantum Hall effect at {\nu} = 5/2 is
described by the Pfaffian or anti-Pfaffian state in the absence of disorder and
Landau level mixing. Those states are incompatible with the observed transport
properties of GaAs heterostructures, where disorder and Landau level mixing are
strong. We show that the recent proposal of a PH-Pfaffian topological order by
Son is consistent with all experiments. The absence of the particle-hole
symmetry at {\nu} = 5/2 is not an obstacle to the existence of the PH-Pfaffian
order since the order is robust to symmetry breaking.
