{motive : Lean.Elab.Tactic.GuardMsgs.MessageOrdering → Sort u} →
  motive Lean.Elab.Tactic.GuardMsgs.MessageOrdering.exact →
    motive Lean.Elab.Tactic.GuardMsgs.MessageOrdering.sorted →
      (t : Lean.Elab.Tactic.GuardMsgs.MessageOrdering) → motive t