Goal:
    A : Type  HA : ReflectEq A  a : A
  ============================
   (Some a <> None)


DEBUG:Going to execute:
match goal with
           | H:_ /\ _ |- _ => exact H || (destruct_hyp H; use_hyps)
           | H:_ |- _ => solve [ inversion H ]
           | _ => idtac
           end