Bush administration officials came up with all kinds of ridiculously offensive rationalizations for torturing prisoners. It’s not torture if you don’t mean it to be. It’s not torture if you don’t nearly kill the victim. It’s not torture if the president says it’s not torture.

It was deeply distressing to watch the United States Court of Appeals for the District of Columbia Circuit sink to that standard in April when it dismissed a civil case brought by four former Guantánamo detainees never charged with any offense. The court said former Secretary of Defense Donald Rumsfeld and the senior military officers charged in the complaint could not be held responsible for violating the plaintiffs’ rights because at the time of their detention, between 2002 and 2004, it was not “clearly established” that torture was illegal.

The Supreme Court could have corrected that outlandish reading of the Constitution, legal precedent, and domestic and international statutes and treaties. Instead, last month, the justices abdicated their legal and moral duty and declined to review the case.

A denial of certiorari is not a ruling on the merits. But the justices surely understood that their failure to accept the case would further undermine the rule of law.