Hell the computer you are typing on is a product of intelligent design. When it comes to the complexities of nature is it unreasonable to look at it and ask how so much could have been accidentally brought into being? Is that not a worthy area of scientific inquiry? Why limit yourselves the mechanics?
That question has been asked a lot, and it has not been conclusively answered. It is outside the perview of evolution. Evolution is about what happens to imperfect replicators in a population over time. It is not about origin. It does not address it, and it never will. That would require another theory entirely.
Is that not a worthy area of scientific inquiry?
Hell yes! There's Nobel prize in it, I'm sure. People have been working on it for decades. No conclusive results, yet.
Why limit yourselves the mechanics?
That is what science is. Exactly. How does it work? Why does it work? What in the world does that thing do? That is science. Science does not address the supernatural, nor does it address miracles. That is outside of its scope. It will always be so. The attempts to teach ID in science class have been attempts to take science in a direction that it cannot go. The supernatural is not science.
Because if they didn't they just might end up concluding that there was some kind of Intelligence or design to the universe. They HAVE to stop at manmade things.