All I'm saying that science alone can't prove or disprove anything about God's existance without getting into metaphysics.
I actually had to think for a good 10 minutes, whilst walking my dog, about this question.
At first, this seems a very true statement. But still I disagree.
Take a look at the following two statements:
1. science cannot prove or disprove God.
2. science cannot prove or disprove anything about God.
Obviously, there is a difference. Whilst I agree with the first statement, the second one is proven to be false fairly easily.
We can namely be certain about the following statements considering God:
1. Probability:
It is more likely for event X to occur, than event X AND event Y. Agreed?
In the same way, it is more likely for our universe to occur without God, than with God.
So, we can prove that the existance of God is less likely than the non-existance of God.
2. Measurements:
It is either possible for God to be observed/measured, or impossible. Agreed?
This gives us two options about God:
1) God can be measured, but somehow we have no evidence for him as of yet. Meaning that we can safely say that the measurements and observations we have done to date, are all giving information about where or what God NOT is.
2) God cannot be measured in any way, meaning that nothing can exchange information about God. Meaning that God can not have an impact on anything. If he would have an impact, we could measure that and therefor he would be observable.
3. Creation:
If God created everything, that means he also created Space, Time, the Laws of Physics, et cetera. Agreed?
Again; this leads to two options:
1) God did not create everything, just most of it. But then something else created those things, meaning that God is not omnipotent, and not the sole creator of our universe. (notice how this is saying something about God)
2) God did create everything, including Space, Time and the Laws of Physics.
Now, if statement 2 is correct; that means that at the (first) moment of creation, there was no time, and no causality.
Meaning that we might as well say that the universe created God, as that God created the universe.
4. Conclusion:
Whilst it is impossible for science to prove or disprove if God exists, we can say something about him.
Namely; we can set boundaries on Him. Namely a probability lower than 1, the fact that he must be observable or unobservable, et cetera.
And finally; if we can even set ONE boundary on God, we can already prove that he is not omnipotent.