No. It's simply the best explanation for the evidence.
I don't know what's so complicated about my statement. You postulate " the Designer exists". No observations. No evidence. I don't recognize a scientific process. It's plain old theology.
I sat dumbfounded for a minute or two as I read your reply. What is going on here? There has to be more to it than that.
Of course we cannot make direct obervations of the designer (God of the Bible in this theory), but if He is the desinger then certain things ought to be confirmed. If they are confirmed, then it increases the probability that the theory is correct.
Here is an analogy that fits your answer: We walk into a room and find a body. I say, "Its a murder". You say, "Its a natural death, suicide, or an accident. I don't see any murderer here, therefore, no murder". We inspect more closely. The body is bound and gagged, the money and jewelry are missing, and the person died from multiple gunshot wounds, though no gun is found. I say, "I have a theory that this person was murdered" You say, "That is not a scientific theory, because I don't see any murderer." In your worldview, we don't even start looking for the killer, just more evidence on how the "accident" occurred. Any suggestion we start looking for evidence to narrow the identity of the killer is dismissed out of hand.
That's trash, and you've got to know it.