Are you a God-believing Atheist?

Read today's paper and saw a quote from an article stemmed from the U.S. Religious Landscape Survey:

Another finding almost defies explanation: 21 percent of self-identified atheists said they believe in God or a universal spirit, with 8 percent “absolutely certain” of it.

Jeff Archer, president of the Atheist Coalition of San Diego, was at a loss to explain how one in five atheists said they believed in God.

“I find it quite preposterous that an atheist believes in God,” Archer said. “The only qualification to be an atheist is a nonbelief in God. When you take that away, then they're not an atheist.”