(motive : Mathlib.Meta.FunProp.LambdaTheoremArgs → Sort u_1) →
  (x : Mathlib.Meta.FunProp.LambdaTheoremArgs) →
    ((id_f id_g : ℕ) → motive (Mathlib.Meta.FunProp.LambdaTheoremArgs.comp id_f id_g)) →
      ((x : Mathlib.Meta.FunProp.LambdaTheoremArgs) → motive x) → motive x