This past week, Dan Barker, famous atheist and apostate, debated James White, famous baby-eating Calvinist and apologist. The debate is now available for cheap from AOMin.org, so let me encourage you to take a listen. I thought it was a pretty good debate, far better than most of Barker's debates, I'll say, and I would say the frequent low quality is often due also to the theist debater on the other side.
Anyway, around minute 5 during the 2nd cross-examination period, Barker began to press White on the question of how God exists. He wisely (or unwittingly) avoided the Gordon Stein pitfall, where he, in debating Greg Bahnsen, pursued this line of questions, paraphrased:
Stein: Is God material or immaterial?
S: Could you define 'immaterial'?
B: Something not extended in space.
S: Could you please give me another example of something that exists and that is immaterial?
B: The laws of logic.
(Audience erupts into laughter. Point, Bahnsen.)
Barker asked White basically: If God is immaterial and, more importantly, outside time, how does He exist? In this Barker neglects the fact that part of the definition of the Christian God is that He is timeless and immaterial, so he is committing an external critique, for one thing. Further, he neglected to mention that his own "side" (ie, many naturalistic scientists) says that that which existed "before" the Big Bang is often said to be outside of the influence of time, since time "had" not "begun" to exist yet.
Anyway, Barker is fond of the FANG, the Freewill Argument for the Non-existence of God, which besides the problems listed in the linked article, also does not interact with the biblical idea that God has foreordained everything in His sovereign plan, and that plan is perfect. What need could there be for Him to decide differently than He has already done? It's not as if Barker believes that humans have freewill either. Maybe he thinks humans don't exist.
Moving on, White was answering basically along these lines and Barker produced the following gem, transcribed exactly as it was spoken on the mp3:
"The point I'm trying to get at is, things happen in our brains. I have a nightmare and there's a monster coming in the window. But there's not really out there a monster coming in the window. It's a function of my brain, my brain's telling me this. So our brains function certain ways and we put certain words on this function, we call it 'mind' or we call it 'thought', but does it really exist outside of our brain? If minds were to cease to exist, then would we even need the word 'logic'? Would we even use the word? Would it even... 'cause it's a concept and you can't have a concept without a mind. Concepts don't exist out there somewhere" (emph. mine).
Note that the Atheist Experience's Matt Dillahunty had based all of the defense that he used against Matt Slick's TAG argument on the idea that the laws of logic, which are conceptual, don't require a mind. Whom to believe - Barker or the Atheist Experience? What a quandary!