King Canute famously demonstrated to his advisers that even a king couldn’t stop the sea from rising. Abraham Lincoln told his visitors that calling a dog’s tail a leg doesn’t make it a leg. But lots of people these days think that passing a law automatically makes things happen, that you can pass a law against drug use or racism or homelessness and solve a problem.

Today I heard a traffic reporter on WAMU public radio demonstrate just how widespread that assumption is, at least in Washington. About 9:20 a.m. he said, “The federal government opened on time today [after a week of closings and yesterday’s delayed opening], so most federal workers are already sitting at their desks.” Well, I was stuck in a miles-long backup on snow-blocked roads, and I’m guessing that a lot of the people in the other cars were federal employees. Just because you declare that the federal government will open on time doesn’t automatically mean that federal employees will get there on time. You have to take into account realities like weather, slow clearing of roads, and people’s unwillingness to start their commute much earlier than normal.

Reality, alas, interferes with a lot of grand plans.