Richard Dawkins and his levels of atheism

In Dawkins' book, The God Delusion, he breaks down atheism into different levels. I have never thought of atheism in this way. Atheism to me was simply the complete lack of belief in a supernatural power. But according to Dawkins, people can sort of not believe in God. He raises the point that scientists can choose not to believe in God based on the lack of evidence, but they do not have the means to entirely disprove the notion of God. This is completely true - among all the theories and laws of the universe and how it works, there isn't anything to disprove the existence of God. With this awareness atheist scientists are as guilty as religious fundamentalists when it comes to putting the blinders on. I tend to gravitate towards Francis Collins and his idea that religion and science do not always have to be at odds with each other. He uses his scientific background and knowledge to prove the awesomeness of God.