I was asked a couple of questions.
a) How can god be proven or disproven theoretically, on a purely logical basis?
I don’t think God can be proven or disproven. I think reality is far too ambiguous and the human mind is far too flawed to accomplish either. I see nothing that forces belief or disbelief on us. I think that in the end, theism or atheism, is a choice. It can be an informed choice, where there are reasons to believe or disbelieve, but it remains ultimately a choice. And, it is a choice that defines us.
b) How can you convince an atheist that there is a god?
That’s not up to me. In my opinion, each of us must make our own decisions. For it is our choice, our life, our fate. My only suggestion is that when one decides whether or not God exists, they do it apart from all the noisy chatter of the world. That is, they make that decision with much contemplation and introspection.
If you choose to be an atheist, that is fine with me. I only speak out against the militant strain of atheism that is trying to demonize religious people as part of its culture war.