My to-do list for some time has included addressing University of Oklahoma biochemist Phillip Klebba’s written response to my September 17, 2007 OU lecture at Meacham Auditorium. Klebba, during the Q&A, asserted that biologists know full well how the bacterial flagellum arose without the need for intelligent design. He then proceeded to describe a four-stage evolutionary process that went from a pilum to the type-three secretory system to an ATP-type motor to the full flagellum. I told him during the Q&A that he was bluffing and that his account of flagellar evolution did not provide the specificity needed to confirm its plausibility. He then lectured me on the fact that I’m not a biologist and thus was not in a position to make such a pronouncement. But the fact is that one does not have to be a biologist to assess Klebba’s claims. Rather, one needs some elementary facility with logic to see whether his claims stack up.
Fortunately, Klebba wrote up his proposal on flagellar evolution in an essay for the OU student newspaper (the essay appeared September 20, 2007 here). I urge UD readers to look at it carefully for it betrays the bankruptcy of evolutionary theorizing when it comes to explaining the emergence of molecular machines. Contrary to molecular and cell biologists such as James Shapiro and Franklin Harold, who regard current evolutionary explanations of molecular machines as spectacularly unsuccessful, Klebba proclaims that the problem is solved:
The evolutionary relationships that led to the bacterial flagellar motor — the poster of irreducible complexity for proponents of intelligent design — are now well-known among scientists studying the biochemistry of bacterial cell envelopes. In brief, the flagellar assembly, which propels bacteria through fluid environments, consists of a long, hollow polymeric filament, a basal body that holds the filament in the cell membrane system, and a molecular motor complex containing a stator and rotor that turn the filament around and around when it is energized.
I’m afraid that after all these years in the ID business, I’m still not entirely used to the brazenness of evolutionary theorists in proclaiming that its unsolved problems are solved. Klebba continues: Read More ›