Marshall likes himself some ridiculous inferences from math. From a slightly misleading presentation of Gödel’s incompleteness theorem, he immediately explains: “This is what it means: Faith and Reason are not enemies. In fact, the exact opposite is true! One is absolutely necessary for the other to exist. […] All closed systems depend on something outside the system. You can always draw a bigger circle but there will still be something outside the circle. Reasoning inward from a larger circle to a smaller circle is “deductive reasoning. […] Reasoning outward from a smaller circle to a larger circle is ‘inductive reasoning.’” That’s not Gödel’s incompleteness theorem and its corollaries, to put it mildly.
Marshall’s real business seems to be some kind of Ethernet guru and expert advisor on Google Adwords (I think it is the same guy, but may be wrong).
If you have the stomach for it, you can read (about) Randy Stimpson writing similar tripe here.
Diagnosis: Pure crackpot, egregious mangler of facts and (apparently) professional Chinese Room – he writes about mathematics, but somehow he seems to fail to grasp what it is all about. In short, Marshall stands to Dembski roughly as Ray Comfort stands to Behe.