[darkocean]

Basically, Behe's approach was this: Complex systems in advanced organisms depend on many biochemical steps, all of which must be in place for the system to work at all.

So how, Behe asked, could such a complex system have evolved, if the only method available was random variation plus natural selection?

It would be impossible to believe that the entire series of steps in the complex system could randomly appear all at once. But any one step along the way, since it does nothing by itself, could not give the organism that had it any competitive advantage. So why would each of those traits persist and prevail long enough for the complex system to fall into place?

That's way too logical for the evolution crowd.

[Dimensio]

That's way too logical for the evolution crowd.

It's not "logical", it's limited thinking. It assumes that only additive processes can bring about new traits, when there's no reason to believe that subtractive processes could also bring about physical features.