A few years ago I was pushed by some Orthodox creationists (people who believe that all animal life was created separately, less than 6000 years ago) to have a debate on the merits of evolution. I responded by asking what kind of evidence, hypothetically speaking, would make them accept it. They dodged and hedged and would not answer the question. Of course, no realistic amount of evidence would convince them, since their opposition to evolution was fundamentally religious in nature. So I pointed out that the idea of having a scientific debate was a farce. A scientific discussion is one in which evidence is presented and conclusions are reached solely on the basis of the evidence. I don't mind having scientific discussions; I don't mind having religious discussions; but a religious discussion masquerading as a scientific discussion is inappropriate (not to mention pointless!)