So I think my main objection is with premise 2. But I hope to say a little bit about why I think disagreement on ID is strongly divided first by responding to this part of your post:
This is an inductive argument, not a deductive argument. The conclusion is not necessarily the case, but follows from the premises with a high degree of probability, based on the number of examples in nature, and comparing them with what we know about intelligently designed human productions. — Sam26
I think I was asking after evidence not to say you were committing a fallacy, but rather because I think the question of how we count examples is precisely why disagreement is often difficult to discuss. Once one counts living items of nature as designed then there really are an incredibly large number of examples that seems to confirm the inference. Likewise, once one counts living items of nature as not-designed, the products of physical forces and nothing more, there are an incredibly large number of examples that confirms the inference. So, in both camps, it's easy to look at the other camp as irrational or dogmatic or confused, or any many other possible psychological explanations which are far from flattering (and certainly miss the point anyways)
In a lot of ways, if I am correct at least, it all comes down to how we count -- meaning, how do we include or exclude some entity from the set of designed entities.
(2) Objects of nature have a structure where the parts are so arranged that the whole can achieve or be used to achieve activities of a higher order than any part alone (e.g., a cat). — Sam26
I'd contend that objects of nature, like a tree or a cat, do not have a structure where the parts are so arranged that the whole can achieve or be used to achieve a higher order than the parts alone. Or, really to put it better and keep our positions linguistically distinct, I think I'd add more to this definition of intelligent design than what you've laid out here.
What does a watch achieve that the parts couldn't? It tells time. At least, it helps us to keep track of the passage of time within the manner that we, as a culture, keeps track of the passage of time better than we can do all on our own. In some sense technology, to put it more generally, is an extension of our desires, and we so happen to live in a culture where it is desirable to be able to keep precise track of the time (even if, in some sense, we may find this desire undesirable). If one part of the watch is removed then it will not fulfill this purpose.
I'd set forth that what a designed entity does is fulfill some purpose that, in this case, an intelligent being wants to be fulfilled (hence why I'm bringing up desire before, but here I'm introducing purpose as well).
Now, higher order I suppose I could see. Sure, if the bits of a tree are separated then the tree will not reproduce. If the bits of a cat are separated then the cat will not reproduce. Separated enough and neither would even be a cat or a tree at all, not even the leftover remains of one, but simply atoms or quarks or whatever it is we want to conceptually break things down to. The whole of the cat or the tree is something over and above its parts, by way of the pattern and arrangement of these very small parts.
But I don't think I'd say that this is enough to say that something is designed. That the parts do more arranged in a certain way doesn't mean that a designer was involved, from my perspective. It seems to me that we need some notion of, first, a being who wants, and second, a purpose which fulfills that want. (I'm always using too many comma's...) -- the aspect of design I *think* we're pretty much on the same page on is in the general sense of the word. I think it's just the specifics, between higher and lower order or purpose, that seems to be how we might see things differently (and therefore count things differently)
Now I don't expect a believer of intelligent design to have to produce evidence of said being. But having a being involved is important to me because I could certainly be swayed in my opinion were such evidence presented -- some being who said, hey! here I am. Look at my records, looks at my plans, this is what I did and see what you see before you? That's what I designed.
That is, I may just be
more skeptical than yourself, and desire more evidence that there was some being involved, rather than
dogmatically so. I can see how another person may not need such evidence, and think that certain entities of nature are very much like our watches, but I'd hope that someone could see why I'd want more to go off of as well.
That being said, since I think it can be mostly lain to the side (these past two paragraphs I'm just addressing the charge of dogmatism more than the actual debate), I think our disagreement lays primarily with notions of higher order vs. purpose.
Do you see it that way?
Does intelligent design negate evolution, absolutely not.
Cool. I'd say you'd be climbing an uphill battle if you thought intelligent design lay in opposition to evolution. Now, stateside, that is normally how intelligent design is presented -- as a theory which should be taught in opposition to evolutionary theory, as if it holds better or equal scientific credibility to evolution.
So perhaps that is also where some of the push back you've mentioned comes from. You mean something different from a politically contentious term, but use the same term.
But if your notion of intelligent design doesn't conflict with evolution, then that's cool. We'll see where this goes.