Of course not.
I can’t know what is meant by “any sort of scientific certitude.” I think there are compelling reasons to believe that design can arise in situations where there is no clear designer, discussed before. But I don’t think there is value in arguing about whether/how someone would acquire ‘certitude’ about this, especially if that person already claims to believe in omnipotent gods. To me, this doesn’t matter and isn’t my point.
I guess I have failed to make the interesting point clear, even after explicitly saying what it isn’t.
That makes exactly two of us in this discussion, except that your questions above are mostly about “certitude” and about whether there is “no designer.” My failed quest was to stimulate discussion about design being considered without reference to or need for a designer. It is very striking that believers seem unable to handle this.