Yet, given these shared assumptions, Behe and Dawkins come to radically different conclusions. Dawkins' argument in The Blind Watchmaker goes like this: "There are probably more than a billion billion available planets in the universe. If each of them lasts as long as Earth, that gives us about a billion billion billion planet-years to play with." He then adds with obvious satisfaction, "That will do nicely!" However, he also warns that "we haven't the faintest hope of duplicating such a fantastically lucky, miraculous event as the origin of life in our laboratory experiments." Thus, he argues that purely theoretical arguments become scientifically justifiable.
Perhaps, but what for Dawkins is a scientifically justifiable piece of theoretical reasoning is a "just-so story" for Behe. Why? Because Behe doesn't share Dawkins' pessimism about what can be demonstrated in the laboratory. While scientists cannot be expected to carry out a billion billion billion years' worth of experiments, nature can and has.
It is interesting that their disagreement centers on what can and cannot be learned in the laboratory. Behe is often depicted in the media as being an off-the-wall sort. I interviewed him a number of years and found that not to be the case at all.