Are you honestly telling me that before we could figure out what was written on any of the artifacts we found, we couldn't be sure they were artificial?
"Are you honestly telling me that before we could figure out what was written on any of the artifacts we found, we couldn't be sure they were artificial?"
We couldn't prove it, no. We obviously could be highly certain it was artificial, but that still needed to be tested. Just like any scientific theory. We hypothesize that no natural cause could produce it, and that it was made by humans. One of the tests to see if it was made by humans is to see if we can decode it. We can. We did. There was a way to test our hypothesis.
The ID Hypothesis as an explanation for the diversity of life we see has no such test. There is no way to falsify it. It isn't science.