Argentina and its most intransigent creditors are duking it out again (or still) in the Second Circuit, reviving the crazy battle over the meaning and import of the pari passu (equal treatment) clause in sovereign debt contracts. For the small but committed contingent of pari passu pointy heads, this is WorldCupOlympicMarchMadnessSuperBowl. For everyone else, this bears watching because an obscure turn in the Argentina story could open the door to enforcement against sovereign debtors in general.