Goal:
    b : byte
  ============================
   (noConfusion_byte_obligation_1 b b
      (noConfusion_byte_obligation_2 b b eq_refl) = eq_refl)


DEBUG:Going to execute:
match goal with
           | |- ?R _ _ =>
                 try typeclasses eauto with subterm_relation Below
                  rec_decision
           end