You can understand why those with an agenda will try to challenge or trap a biologist in order to bolster their cause or knock down what they see as the opposition. They think that they can see weaknesses or flaws in science and that they know how to exploit them. What they tend to do of course is merely demonstrate their own ignorance, bankruptcy of ideas or lack of scruples when it comes to an academic exchange (well academic on one side).
It takes an especially confident frame of mind therefore to try and challenge an entire suite of biologists on something so utterly fundamental as the basis of the theory of evolution by natural selection. Would you believe that this didn’t turn out well and, despite an exceptionally polite tone, the destruction of the position taken is quite beautiful and simple. I thought you’d enjoy it as an example of such exchanges, one only hopes that something is taken away from this.