Of course a visit to the factory in question would confirm the hypothesis. My point was that it is not necessary to visit the factory to be reasonably convinced. What is needed is not "philosophical reasoning" but scientific induction - that is, an understanding of the operation of natural processes such that we can predict both what nature does and does not do. From your mockery it seems you refuse to admit to the existence of factories and engineers unless you have seen them personally. This is not reasonable.
It is the scientifically knowledgeable person who knows with confidence what nature can and cannot do. A scientific illiterate can say with blind faith both "God must have done that" OR "nature did that, no designer was needed" depending on their prejudice. History is full of examples of people wrongly ascribing divine special activity to natual events, but increasingly it is also full of naive and pretentious declarations that nature has achieved something that is quite contrary to scientific laws and principles.
Okay. So can you show how philosophical reasoning 'scientific induction' demonstrates that bluejeans are manmade? Exactly what 'natural processes' do you have to understand to conclude that these crazy pants are made by people?
Me, I think I'll stick with evidence, thanks. And just because my general levity, you needn't assume that admissible evidence is only constituted of physical eye-sight inspection of bluejean factories.
"It is the scientifically knowledgeable person who knows with confidence what nature can and cannot do."
WHAT
You've a pretty bizarre view of science there son.
"History...is also full of naive and pretentious declarations that nature has achieved something that is quite contrary to scientific laws and principles."
Quite so good sir, it is nothing more than impudence for those Wright brothers to claim their gadgetistical contraption allows them to fly through the air. Why, human flight violates all scientific laws and principles! I say this, for I am a scientifically knowledgeable person, and I know with confidence what nature can and cannot do. Harrumph!
And don't get me started on that despicable wench Mrs Curie and her 'radium'.