Debating the Existence of God
Just about all of the central doctrines of the world's major religions are matters of truth or falsehood, not opinion. What this means is that these doctrines are either true or false - but proving them true or false is a tricky matter. While science has been able to demonstrate that most of these doctrines are exceedingly unlikely, it is the nature of science that basic religious beliefs won't be proven absolutely false. It is in this increasingly tiny space of possibility that faith makes a home, and where the defenders of theism operate.