Goal:
    A : Type  P : list A → list A → A → A → Type  Γ : list A
  ============================
   ({| pr1 := Γ; pr2 := Γ |} = {| pr1 := []; pr2 := [] |}
    → let H := CoreTactics.block in
      let H0 := CoreTactics.block in
      All_fold (λ (Γ : list A) (d : A), P Γ Γ d d) Γ)


DEBUG:Going to execute:
simplify * || simplify ?