I never say anything about proof, ever, Joe, and you know it. "Proof" has a finality about it that true scientists don't seek. The true philosophy of science is that we are involved in a never-ending, delicious quest to get nearer to the truth. But every step along that path requires evidence. Religious belief is always irrational because it is never predicated on evidence. But that's fine. We are not Mr Spocks, any of us, and an innate quality of the human condition is the capacity for irrationality. Which is why I support Liverpool FC and why I love Kylie. Arguably, that's a lot less harmful than religious belief has ever shown itself to be. That doesn't have to be the case, of course. If only people of faith would keep it strictly to themselves...