Goal:
    A : Type  P : list A → A → Type  l : list A
  ============================
   (∀ a : All_fold P l,
      let H := CoreTactics.block in
      let H0 := CoreTactics.block in
      noConfusionHom_All_fold_obligation_1 A P l a a
        (noConfusionHom_All_fold_obligation_2 A P l a a eq_refl) = eq_refl)


DEBUG:Going to execute:
intros p