Who says Neo-Darwinists can't evolve? The appearance of Intelligent Design has afforded them to add a new argument to the standard one of "just add sunlight": "Young Earth creationists have been pointing to the 2nd Law of Thermodynamics for years, so you can dismiss the argument out of hand." If you don't believe me, look at how many articles start out with "guilt by association." These same articles will purport to open your eyes to the (supposedly) mere rhetorical devices of all nonbelievers in Darwinism (collectively and misleadingly, called "creationists").
Accepting for the moment Sewell’s idiosyncratic terminology, we can say that if we take the Earth by itself as our system, then there is definitely something entering to make an increase in biological complexity more likely. The solar energy received by the Earth fuels the chemical reactions that allow living organisms to survive and reproduce. This cycle of survival and reproduction ultimately leads to natural selection, which can, in turn, lead to increases in biological complexity. Minus that energy living organisms would quickly go extinct and evolution would not occur. --Jason Rosenhouse
The gas I put in my car certainly makes locomotion much more likely to happen. How the gas makes an
engine more likely is apparently unnecessary to explain, though it's the difference between my car behaving like a vehicle or like a pretty boulder. Rosenhouse would almost certainly cry foul to this and fall back on the most common version of "I just point at the sun": evolution works through an alchemical combination of chance and necessity as revealed in the Methinks It Is Like A Weasel experiments of the renowned atheism evangelist Richard Dawkins. It is almost suggested that some precursor to natural selection acted on protometabolic processes, leading ultimately to natural selection in his words. I say "almost" because I am giving the benefit of the doubt since it really does sound like the availability of energy to exploit directly leads to survival of complex cybernetic entities (i.e. "living organisms") which directly leads to complexity. Keep this progression/cycle in mind.
Another argument that is almost always present either implicitly or explicitly is the bandwagon argument. If you perceive a problem with the aforementioned progression, that means many people much more distinguished than you are wrong, and you don't want to appear foolish, do you? Again, these articles proceed unabashedly in this manner even while warning you of the fallacious rhetoric of the enemy.
I want to revisit Rosenhouse's last sentence there:
Minus that energy living organisms would quickly go extinct and evolution would not occur.