A good post by Massimo Pigliucci:
Scott — who is an atheist — has repeatedly said that one cannot claim that science requires atheism because atheism is a philosophical position, not a scientific one. She leverages the standard distinction between philosophical and methodological naturalism: if you are a scientist you have to be a methodological naturalist (i.e., assume for operative purposes that nature and natural laws are all that there is); but this doesn’t commit you to the stronger position of philosophical naturalism (i.e., to the claim that there really isn’t anything outside of nature and its laws). Years ago, when I first met Genie Scott, I had a Dawkins-like problem with this. I saw the distinction as sophistic hair splitting, and told her so (she was my guest for one of the annual Darwin Day events at the University of Tennessee). Then I started taking philosophy courses, understood what she was saying, and found it irrefutable. I sent her an email apologizing for my earlier obtusity.
That said, both Genie and I do recognize that science is one of the strongest arguments for philosophical naturalism, and I suspect that in her case, as in mine, a pretty big reason for why we are atheists is because of our understanding of science. Still, the philosophical/methodological distinction is both philosophically valid and pragmatically useful, since it doesn’t serve the purposes of either science or education to fuel an antagonism between a small minority of atheistic scientists and 90% of the world’s population (those taxpayers, on whose good will the existence of science and the stipends of most of said scientists depend).