(motive : Option (Lean.Expr × Lean.Meta.Grind.AbstractM.State✝) → Sort u_1) →
  (__discr : Option (Lean.Expr × Lean.Meta.Grind.AbstractM.State✝¹)) →
    ((f : Lean.Expr) → (s : Lean.Meta.Grind.AbstractM.State✝²) → motive (some (f, s))) →
      ((x : Option (Lean.Expr × Lean.Meta.Grind.AbstractM.State✝³)) → motive x) → motive __discr