Goal:
  
  A : Type
  P : list A → A → Type
  e : apply_noConfusion [] [] (λ _ : True, True) eq_refl
  ============================
   (noConfusionHom_All_fold_obligation_2 A P [] (All_fold_nil P)
      (All_fold_nil P)
      (noConfusionHom_All_fold_obligation_1 A P [] 
         (All_fold_nil P) (All_fold_nil P) e) = e)


DEBUG:Going to execute:
tac H