(motive : Option (Lean.Expr × Lean.Expr × Lean.Expr × Lean.Expr) → Sort u_1) →
  (x : Option (Lean.Expr × Lean.Expr × Lean.Expr × Lean.Expr)) →
    ((α lhs β rhs : Lean.Expr) → motive (some (α, lhs, β, rhs))) → (Unit → motive none) → motive x