I have been debating with myself one specific point which essentially stems from the fallacy that a lack of evidence is not an evidence of lack. (Note that this a purely a thought experiment, not a claim, and that, on balance, the whole set of arguments against theism outweigh one possible philosophical issue which only relates to intellectual decency.)
Essentially, the fact that there is a lack of evidence to support theistic views does not mean that it's evidence of a lack of God. Imagine God to be something similar to our 21st century minds and technology like the continent of America was to 15th century Europe.
(Side note: To avoid potential nitpicking about this specific premise, I know that America was discovered and rediscovered, but the "official" discovery was an accident as the goal of the expedition was to find India. That some in the 15th century Europe might even have been aware that America existed is a bit irrelevant as society as a whole certainly did not believe it was there, and it's the mindset of those who did not believe which is interesting.)
Now, try to enter this mindset and think that God is in a similar situation. Just like the 15th century mindset and technology could not comprehend the continent of America, the mindsets and technology today is not capable of providing the evidence required to detect or understand a divinity.
Therefore, a God may exist (but it doesn't matter).
Edit: The title was erroneous in it's use of the word "for". This is not an argument for theisim, it's an argument not against theism. Thanks to Kasu for this insight.
Wow- I'm glad you're still with us.
I enjoy reading your posts.
Heather, I don't see my previous reply-
"Wow, I'm glad you're still with us"
I don't think this would work that well as an argument for theism (I like your point though).
If we think about our evidence for god as the the continent of America to 15th century Europe, then it would only require further scientific/technological advancement to find the answer (or at least as close as we can get to one).
This doesn't work well with theists because they (or at least many) hate science and try to fluff it with religious bull$hit in schools.
If they really want to work with this way of thinking and prove that there really is a god, then many would have to stop being jerks and promote the learning of science in schools and other places. Unfortunately, christianity is all about arrogance and knowing the answers immediately, so I doubt any christian would care for this mindset.
I'm not sure I have good answer for you. This is the way I see it. Doug Stanhope has a great bit about if you have never heard of Christianity and you found the Bible in an old book store and read it. Would you buy up the whole Christianity religion? Most likely not. So if no one had ever heard of God or religion and one day someone told you that there was a being that they couldn't prove to you was there (insert the rest of your favorite God argument). Could you or would you believe it?
This by the way is the same reason that I HATE it when someone says that no matter where they were born they would be a Christian.