These two posts one by PZ Myers and one by Paul Nelson bring out the key issue that separates the evolutionists from the anti-evolutionists. The critical issue is one I have made a lot of on this blog; namely, irreducible complexity versus reducible complexity. This question is about how our world is made in the abstract realm of configuration space; given our particular physics just how is the class of stable organic forms arranged in configuration space? Are these forms closely packed enough to allow random evolutionary jumps between them or are they too widely separated thus effectively blocking any possibility of evolution? It’s notable that both parties manage to address the same subject without appearing to be cognizant of this question. Configuration space is a huge, complex, abstract and perhaps mathematically intractable object; PZ Myers and Paul Nelson are like insects crawling around on the face of a mountain, unable to see the broad sweep of the landscape for what it is. Both parties need to humbled by the immense platonic landscape in which they are embedded.
The anti-evolutionists can’t finally prove that biological structures are irreducibly complex or be cognizant of the non-linearities that may lie in configuration space which could give rise to sudden evolutionary spurts. And yet the evolutionists can’t present a full suite of evidence showing that biological structures are reducibly complex. This argument is going to run and run.
You don't have to be religious to use religious logic: Just reconstruct this cartoon using either "reducible complexity" or "irreducible complexity" instead of "baseball".
With acknowledgements to: