It's not that McDowell doesn't ask him a single probing question.
It's not that Dembski still doesn't understand that the source of information in biology is well-understood biological processes such as mutations, recombination, gene duplication, and gene transfer.
No, the single funniest thing is that Dembski points to his nearly-dead, on-its-last-legs vanity journal Bio-Complexity as one of the ID movement's greatest scientific successes.
As I've pointed out before, Bio-Complexity is a great example of the utter intellectual vacuity of intelligent design. Despite having an editorial board of 31 people, in 2014 the journal managed to publish exactly 1 research article and a total of 4 papers. In 2015 they published a total of 2 papers. In 2016 so far they've published exactly 1 paper. (At that rate, in 2017 they'll publish half a paper.)
Wow! That is a research record to be very proud of! It really shows that intelligent design is fruitful, and inspiring top-quality research from scientists all over the world! The only downside is all the hard editorial work that needs to be done by those 31 members of the editorial board. Why, if they didn't have to spend all their time reviewing papers, they might be publishing some intelligent design research of their own. Truly, it's a scientific success.