We would also have to ask if any observation of evolving function in sequences would be evidence against design, or if these observations would be considered ongoing design. Behe famously stated that if we observed something like the bacterial flagellum evolving in the lab this would disprove design, but he also seemed to walk this back in more recent times. On the face of it, it would seem rather strange that design would suddenly stop, unless there is a theological reason to make this argument.
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