Brian "Sapient" is an average-looking 30-year-old guy who works out of his basement in Philadelphia. His job? Well, Brian is taking on God.
"Wow, that's a dramatic way of putting it," says Brian, who asked that "Nightline" not use his real last name for safety reasons. But however he defines his challenge, Brian is on the cutting edge of a new and emboldened wave of atheism.
"There isn't any good reason to believe in God," asserts Brian. "It's that simple."
What's wrong with God?