(motive : MProd Lean.MVarId Lean.Meta.Simp.Stats → Sort u_1) →
  (x : MProd Lean.MVarId Lean.Meta.Simp.Stats) →
    ((mvarIdNew : Lean.MVarId) → (stats : Lean.Meta.Simp.Stats) → motive ⟨mvarIdNew, stats⟩) → motive x