(motive : Option (ℕ × Lean.Grind.CommRing.Var) → Sort u_1) →
  (__discr : Option (ℕ × Lean.Grind.CommRing.Var)) →
    ((r : ℕ × Lean.Grind.CommRing.Var) → motive (some r)) →
      ((x : Option (ℕ × Lean.Grind.CommRing.Var)) → motive x) → motive __discr