I really don't understand why atheists agree to debate philosopher William Lane Craig on the existence of God. Every time they do they wind up the way Wile E. Coyote winds up whenever he tries to ambush the Road Runner.
The latest example is physicist Dr. Lawrence Krauss who debated Craig at North Carolina State University the other night on the topic whether there is evidence for the existence of God. He shouldn't have bothered. Despite being an accomplished scientist he was clearly out of his league, and appeared totally unprepared for Craig's arguments. He not only seemed unable to comprehend the relevance of confirmation theory to the topic, but looked confused and unsure how to respond to Craig beyond mildly patronizing asides and simple assurances that Craig was wrong. He didn't offer much reason why we should accept these asseverations, and indeed spent an awful lot of time agreeing with Craig while trying to sound like he was refuting him. Much of the rest of his time was spent elaborating upon irrelevancies.
Craig offered five clear lines of evidence for God's existence, to none of which was Krauss able to offer more than a perfunctory and uncomfortably desultory challenge. Perhaps it really is the fault more of the debate topic than of Krauss' ability to champion atheism. It's pretty hard, after all, to argue that there's no evidence for God's existence, and it's especially difficult when one has, as Krauss acknowledges early on, little interest in philosophy. Anyone who hasn't read much philosophy really shouldn't embarrass himself, no matter how much hubris he may bring to the stage, by publicly debating a philosopher on a philosophical topic.
If you're an atheist, or even if you're not, you'll probably be wondering why atheists can't put up someone against Craig who seems to know what he's talking about. Or, you might wonder whether the difficulty is more with atheism than with its defenders.