Jim: This *seems* like a simple system, but it may actually be a candidate
for irreducible complexity (IC). And that would mean Keith was
assuming the existence of IC to show that IC does not exist!
Note that Robison does not deny the existance of an IC, just does not
share Behe's belief that such a system could not have evolved gradually.
This is exactly my point, IC systems may exist but Behe has failed to show
that they could not have evolved.