Dear Richard,

We're both scheduled to discuss issues of Darwin and God on the Riz Khan Show on Al-Jazeera on Monday, July 21. Viewers who are interested can watch the show live here. The segments will also be posted on Youtube and I'll link to them.

But a few hours after I mentioned our forthcoming debate on this blog, you posted a comment on your website essentially accusing me of making the whole thing up. So first you accuse me of having a Hitler voice, and now you accuse me of misrepresentation.

Here's what happened. Al-Jazeera contacted me a while ago, asking me to appear in a point-counterpoint format with a leading opponent. I said I was writing about God and atheism, and suggested I appear with a prominent atheist. They chose you. Then the producer Zeresnaey Abraha confirmed that you were ready to do it. Late last week I got a studio notice from Al-Jazeera giving me the time for me to arrive at their rented San Diego studio. The other guest was listed as "Richard Dawkins" and your studio details at Oxford were given.

Apparently when you found out that the two of us were booked on the same show, same segment, you rushed to the producer to insist that we appear separately. Your pretext according to Abraha was that you have a long-standing pledge not to debate "creationists." I can understand that you don't want to give legitimacy to people who flatly deny evolution or who insist that the earth is less than 6,000 years old. The only problem with you invoking this pledge is that I believe in evolution and am not, nor have I ever been, a "creationist."

Apparently the format now is that we will each be interviewed separately. So technically it's no longer a debate, although it is most certainly an exchange of rival ideas on the same topic. It's a pity that we cannot engage each other directly.

To be honest, I find your behavior extremely bizarre. You go halfway around the world to chase down televangelists to outsmart them in an interview format that you control, but given several opportunities to engage the issues you profess to care about in a true spirit of open debate and inquiry, you duck and dodge and run away.

If we debate on the Riz Khan show, a format comparable to ABC "Nightline," you cannot seriously think I will drown you out with Hitler shouts. And if I tried that in an academic setting I would make a complete fool of myself. I have done several debates with your fellow atheists Michael Shermer and Christopher Hitchens (and have just scheduled my second debate this fall with Peter Singer) because all of them have consistently found me a serious and worthy opponent. Hitchens told me in Las Vegas that each time our debates are different because both of us adjust to what the other guy said the last time around. This is how knowledge is tested, through the process of critical exchange, isn't it?

You are supposed to be the public champion of science and reason and enlightened discourse. This is basically what your title at Oxford says, right? This is why the Microsoft billionaire Charles Simonyi is paying your salary, isn't it? So are we to believe that despite the seriousness of the issues involved, issues that engage your whole life's work, you won't even stand up and defend your views even in a hospitable setting like Oxford or any other venue of your choice?

Many years ago I read The Selfish Gene and was deeply impressed. What especially struck me was your intellectual audacity, your willingness to jump into a big debate and take on the big questions, and of course your literary eloquence. If you are so confident that your position is right, and that belief in God is an obvious delusion, surely you should be willing to vindicate that position not only against Bible-toting pastors but also against a fellow scholar and informed critic like me!

If not, you are nothing but a showman who takes on unprepared and unsuspecting opponents when you yourself control the editing, but when a strong opponent shows up you manufacture reasons to avoid him. Somehow, I would have thought the author of 'The Selfish Gene would be made of sterner stuff. .