Goal:
    A : Type  B : Type  C : Type  R : A → B → C → Type  e : True
  ============================
   (noConfusionHom_All3_obligation_2 A B C R [] [] [] All3_nil All3_nil
      (noConfusionHom_All3_obligation_1 A B C R [] [] [] All3_nil All3_nil e) =
    e)


DEBUG:Going to execute:
fun tac H =>
             DepElim.do_intros H; DepElim.generalize_by_eqs H; tac H