Which claim?
If you mean my claim that it's logically impossible for you to base all of your beliefs on reason and none on faith, that is easily demonstrated, and I've already done it. As far as I know, it's not a controversial statement either.
Edit: Sorry, I didn't read the quote. You probably mean my claim about evolutionists believing in God. There are polls on this kind of thing from time to time. Here's one recent one. According to it, 33% of all scientists believe in God, and an additional 18% (so a total of more than half) believe in a universal higher power.
http://pewforum.org/Science-and-Bioethics/Scientists-and-Belief.aspx
Also, I've spent many years in higher education. I speak to academics all the time from all fields, including every branch of science, who are Christians of some variety. It would be statistically impossible for me to encounter that as often as I have if it were a very rare thing.