(motive : Option (ℕ × Aesop.Script.Step) → Sort u_1) →
  (x : Option (ℕ × Aesop.Script.Step)) →
    ((step : ℕ × Aesop.Script.Step) → motive (some step)) → ((x : Option (ℕ × Aesop.Script.Step)) → motive x) → motive x