Interesting. The "laws" of science really are no such thing, you say, and only serve as useful tools to understand the world around us. We can not, therefore, "know" science but, through science, as we understand it, we can certainly "know" that there is no God. Very interesting.
Not quite. I don’t think you will find many scientists ready to definitively say there is no God. It’s still a hypothesis, much like parallel universes or something.
Most of the atheists who you find rail against God are, when push comes to shove, really just agnostic. Their main beef is with religious dogma and superstition.
Here, for example, is one of the most famous (or notorious, depending on your perspective) atheist scientists of them all, Richard Dawkins, talking about how he can’t be definitively sure there is no God:
It’s just that modern science is starting to show how apparent order can arise spontaneously from complete chaos. This has been shown through approaches as different as evolutionary biology to chaos theory to M theory.
Another example: Stephen Hawking, the late physicist, was very impressed by the seeming order and design of the universe early in his career, pointing to a possible intentional designer (what philosophers in medieval times called the cosmological, or the closely related teleological argument for the existence of God). He was especially intrigued by the apparent “fine-tuning” of the physical constants in physics, from the gravitational constant to Planck’s constant, to allow the emergence of life. But as the physics evolved even during his own lifetime, especially the emergence of M-theory which he helped develop, he began to realize that it was not necessary to posit any deliberate intent to this apparent fine-tuning. It could arise spontaneously.
So in his last book, “The Grand Deaign”, he concludes:
“it would not be necessary to appeal to God to decide how the universe began. This doesn't prove that there is no God, only that God is not necessary."
Notice though, how he too does not so far as to definitively rule out the God hypothesis. But it’s just that the more science has grown, the less need there seems to be for this hypothesis.
There are a lot of other problems with the God hypothesis as well besides that the old cosmological argument is becoming less attractive. We can get into those if you like.
