I am not trying to define the supernatural out of existence.
I am claiming there is no credible evidence of anything supernatural, and as an empiricist I do not accept anything as true or real without credible evidence. Thoughts and statements about the supernatural exist in the natural world. By this view, if "god" exists it has to be in the natural world.
The argument for the existence of god or first cause goes like this
Every subsequent cause is a logical corallary of the first cause. As I mentioned earlier this is the "god" of both science and religion, regardless of what one calls it.
[Standard observations about causality omitted.] I will stick with my god, as I suspect all other organisms do also. The above argument stands or falls on its own.
Referring to others for support is a type of false reasoning
Almost no informed atheist would seriously claim that the Big Bang -- or more precisely, the framework of physical laws that allow the Big Bang to arise from an uncaused singularity -- is its own cause completely ex nihilo. (An exception is the atheist philosopher Quentin Smith, but his attempts seem questionable.)The modern atheistic alternative to God as Uncaused Cause is in fact the metaphysical theory called modal realism, which explains the existence of our universe by saying that all possible universes are equally real -- or at least seem real to their hypothetical inhabitants.