(motive : Lean.Elab.Term.Quotation.HeadCheck → Sort u_1) →
  (x : Lean.Elab.Term.Quotation.HeadCheck) →
    ((p s : ℕ) → motive (Lean.Elab.Term.Quotation.HeadCheck.slice p s)) →
      ((x : Lean.Elab.Term.Quotation.HeadCheck) → motive x) → motive x