>Peter: I don't think the leading ID [intelligent design] people would be satisfied with an IC [irreducible complexity] definition admitting partial systems "not favored by selection", but viable. Rather, they would insist that each partial system on any conceivable evolutionary path would be lethal.
I do not see how this could be proven. More importantly, I do not see prominent ID advocates promoting this approach. I do not see any connection between Dembski's specified complexity and the viability of intermediate systems. (For that matter, I do not think specified complexity is a very good correlate of special design). Many of Behe's complex systems are not necessary to life, so partial systems will not be inviable. Even some systems that currently must be complete for all modern organisms show traces of ancient gene duplications that indicate that an ancestral organism was getting by with fewer parts.
Dr. David Campbell
Saint Mary's College of Maryland
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