This arguement is futile. It's impossible to prove or disprove the existence of God, no matter what axioms you begin with or what logic you use. If I postulate that there is an invisible, massless clown in the sky, how you can prove or disprove it?

However, modern science has shown that there while there is much evidence of natural processes, directed by physical laws and forces, there is no evidence at all for an intelligent guiding power. This is of course not proof, but for a rational person, it is good enough.