{motive : Aesop.RuleTacDescr → Sort u} →
  (t : Aesop.RuleTacDescr) →
    t.ctorIdx = 0 →
      ((term : Aesop.RuleTerm) → (md : Lean.Meta.TransparencyMode) → motive (Aesop.RuleTacDescr.apply term md)) →
        motive t