It has been falsified as the ONLY important mechanism. Non-darwinian processes are needed too. That means this definition of evolution was falsified 50 years ago:
Which is why I am justified in asking why Behe is arguing against a theory falsified a long time ago by other people. We all agree that we need non-Darwinian evolution too, so at some point he has to engage with that to make a real argument against evolutionary science.