In the last two days Prime Minister Boris Johnson has proposed that Ireland temporarily leave the European Union to align with the economic rules of a post-Brexit U.K. German chancellor Angela Merkel has suggested, somewhat flippantly, that the U.K. could figure out a special trading arrangement for itself and Ireland in the next 30 days. And French president Emmanuel Macron has said that there’s still room for negotiation between the U.K. and the EU, but he’s willing to be “the hard boy.” Maybe Macron is taking the EU marriage metaphor a little too personally . . .What on earth is going on?It’s been three years since a majority of the U.K.’s electorate voted to leave the European Union. And so far, all that Brexit has generated is a great deal of nearly incomprehensibly vocabulary. First we got Theresa May’s red lines, her attempt to define how it was exactly that Brexit means Brexit, and what the future relationship, if any, the United Kingdom would have with the EU. These red lines, an end to freedom of movement from EU member states into the U.K., and an exit from the EU’s customs union ruled out the Norway option but not Canada Plus Plus. Or Canada Plus Plus Plus. Yes, I’m serious.According to the withdrawal agreement negotiated between Theresa May and the rest of the EU, that future relationship has to be figured out in the transition period. That’s a two-year window after the U.K. leaves the EU in which it would continue to follow EU rules until they came to a trade agreement. That is, unless there is a no-deal Brexit and the U.K. simply exits the European Union on October 31 and conducts business with the world based on World Trade Organization rules. Got it? Well, sort of.The focus is now on the Irish-border backstop. Basically, the backstop is a promise that there will be no hard border — a customs border across the island of Ireland, between the Republic of Ireland and the six counties of Northern Ireland. Irish public officials have argued (with the support of the EU) that a frictionless border is necessary for economic and political reasons. The frictionless border is understood there as part of the the peace settlement in Northern Ireland, following the 1998 Good Friday Agreement. So too the “all-island economy” that it creates. The backstop is a promise by the U.K. to keep Northern Ireland following a number of regulations and customs rules that match it to the Republic of Ireland.This promise became the focus of Tory and Brexiteer anger at Theresa May’s withdrawal agreement. First, because it created what seemed like a negotiating trap for the U.K. during the transition period. Having already agreed to keep Northern Ireland (and the rest of the U.K. with it) aligned with the EU’s rules as part of a backstop, the EU would have less incentive to come to another, different trade relationship to supersede that agreement. The price to be paid for testing and pushing the EU might carve up the United Kingdom itself. If Great Britain diverged from the EU at the end of the transition period, Northern Ireland would be partially politically detached from the Union, and perhaps its citizens would have to go through customs to travel within their own country, from Belfast to Birmingham.Recently Johnson has begun calling the backstop “undemocratic” and hinting that it violates the Good Friday Agreement. He has a point. The backstop would keep Northern Ireland subject to EU rules and regs in which they have no say. It would deprive Northern Ireland’s elected ministers to Parliament of any voice on matters that would be routine for MPs in any other constituent nation of the United Kingdom. That seems quite a lot like a partial form of Irish unification. But the Good Friday Agreement ensures that Irish unity can be achieved only by a majority vote for it in the six counties and another one in the Republic of Ireland.Proponents of the backstop hold that this measure would merely be the decision of a sovereign Parliament over a part of its territory. It is an agreement between Parliament and the EU and doesn’t legally touch Ireland. That’s true. But, the reality is that it would create checks between constituent parts of the U.K. that normally exist between two different countries. It does so in order to prevent those checks on the island of Ireland. And it does so to meet the expectations of the Irish government based in Dublin. To whom would Northern Irish people turn when trade policy affects them? Nobody they directly elect would have a constitutional say.Effectively these economic rules would be imposed on Northern Ireland as if it were a kind of EU colony, and done in the interests of the Republic of Ireland. This may satisfy the historical imagination of Irish nationalists. (Believe me, there is a delicious irony to be savored here.) But it is hard to argue that such a result is consonant with the Good Friday Agreement. Or a wise way to endear Northern Irish unionists to the Irish government.All of this confusion is the result of a kind of gamesmanship. The EU and U.K. each want to use the Irish border as a reason to crack the other’s negotiating position. The EU would like to see the U.K. bounced into a permanent customs union in which it has no say, effectively maintaining the economic size and power of the EU while reducing the political influence of Eurosceptical Britannia. On the other side, the U.K. would like to see the Irish-border issue work in the opposite way, forcing the EU to strike an especially good and liberal trade deal with the U.K. that comes with fewer strings attached than those on Norway or other states that have non-standard arrangements.The lesson is rather obvious. You cannot predetermine what kind of infrastructure will be at a border and what laws will be enforced at it, in the absence of a durable agreement on trade in goods and materials. The EU and the U.K. have been trying to resolve questions in the wrong order. Both have done so out of a reasonable fear of loss.But the hour is late, and the real work must be done.