During the Sye Ten Bruggencate debate with Matt Dillahunty there were some interesting audience questions.
1) One gentleman asked why everyone isn't saved, if every one knows/believes that God exists. As Sye explained, the problem with the question was that it presumed that it is enough for salvation for people to know the truth of the gospel (i.e. understand the content), or enough for salvation for people to assent to the truth of gospel (i.e. acknowledge that it is true). Instead, salvation is about trusting in and relying Jesus Christ alone for salvation, which we could describe as viewing the truth as good and desiring it for oneself.
2) Another gentleman asked whether, if God exists, Matt Dillahunty thinks that God owes him anything. This question was good from the standpoint of providing one way of getting atheists to try to think. Sometimes atheists try to raise internal critiques of God's existence. Usually these critiques fail because they aren't dealing with the God of the Bible. For example, some atheists seem to think that if God exists, then there should be no human suffering, as though God's primary purpose would be to serve us and make us happy, instead of vice versa. Such a critique is obviously - at best - an external critique.
In this particular case, Matt stated that he said there would be some things that he would like - but that he did not believe that God would owe him anything. But then Matt took it a step farther and said that he felt that he would not owe God anything. On the contrary, if the God of the Bible exists, then Matt owes God obedience and repentance and faith when obedience falls short.
3) One lady raised an excellent question regarding how one gets from "there must be an absolute outside ourselves" to "the God of Scripture is true." Sye explained that rather the God of the Bible is a necessary starting point in order to make sense of any absolute. Thus, it is not "absolutes therefore God" but rather "God therefore absolutes."