Irreducible Complexity and a Strawman

I made a comment in a Telic Thoughts thread entitled Sad Smoke and Mirrors in which I quoted from Dembski's book No Free Lunch. Dembski refers to irreducibly complex systems- ones which would not develop "in one fell swoop." What struck me about the quote was that Dembski was not making the claim that IC systems could not come about by identifiable means. In fact he mentions non-Darwinian events he excludes from the insuperable obstacle to an IC system outcome. The significance being that a strawman is destroyed i.e. the one alleging that IDists claim an IC system could not be produced by known physical means.