> Please imagine that my response is "I said good day sir!"

That sounds a lot like "Anyway, why do I think I have time for this ... "

It's clear to me that "stuff" can be arranged to work as a Turing Machine (or some other kind of computer) without design or intent. Whether it is such a thing or not depends on how it is used; a Turing Machine that is given random inputs, or whose outputs don't mean anything to anyone, is a computer only in a formal sense. If nobody knows that some thing is a computer, I'm not sure that it's computer-ness is meaningful.

So that's why I think intent and interpretation are relevant.