{motive : Mathlib.Meta.NormNum.Result' → Sort u} →
  (t : Mathlib.Meta.NormNum.Result') →
    t.ctorIdx = 3 →
      ((inst : Lean.Expr) →
          (q : ℚ) → (n d proof : Lean.Expr) → motive (Mathlib.Meta.NormNum.Result'.isNNRat inst q n d proof)) →
        motive t