So Republicans may have decided to raise the debt ceiling without conditions attached — the details still aren’t clear. Maybe that’s the end of that particular extortion tactic, but maybe not, because, at best, we’re only looking at a very short-term extension. The threat of hitting the ceiling remains, especially if the politics of the shutdown continue to go against the G.O.P.

So what are the choices if we do hit the ceiling? As you might guess, they’re all bad, so the question is which bad choice would do the least harm.

Now, the administration insists that there are no choices, that if we hit the debt limit the U.S. government will go into general default. Many people, even those sympathetic to the administration, suspect that this is simply what officials have to say at this point, that they can’t give Republicans any excuse to downplay the seriousness of what they’re doing. But suppose that it’s true. What would a general default look like?

A report last year from the Treasury Department suggested that hitting the debt ceiling would lead to a “delayed payment regime”: bills, including bills for interest due on federal debt, would be paid in the order received, as cash became available. Since the bills coming in each day would exceed cash receipts, this would mean falling further and further behind. And this could create an immediate financial crisis, because U.S. debt — heretofore considered the ultimate safe asset — would be reclassified as an asset in default, possibly forcing financial institutions to sell off their U.S. bonds and seek other forms of collateral.