No it's observation. We see what occurs now. We hear what DNA has to say. We see what a sequence of fossils looks like. We then, through a bit of logic, statistical analysis, and chemical analysis, conclude what happened in the past.
But the IDer knows what we have discovered and can and sometimes does change what we'll discover next before we discover it. It's all an illusion created be the IDer. Why can't you see that?
You've just elucidated why Intelligent Design is not science. There is no way to identify or differentiate between designed that looks designed and designed made to appear natural.
ID also infers that complexity is a hallmark of design, without showing that nature can not produce complexity; it is nothing but an argument from incredulity. They need to show, unequivocally, that nature can not produce complexity, rather than just claim that that is the case.