The fundamental question is living things, nature, the earth and the universe and everything that allows them to function speak of design. It looks designed, it works like its designed. It has all the criteria for design that we use for absolutely everything that is made by humans. In fact it has far greater design especially when we look at the inner workings of things such as down at the genetic or particle level. So why do we all of a sudden begin to attribute some other description to life.
Because you've ignored two of the most important factors for determining design: a lack of a plausible naturalistic mechanism, and the existence of a plausible designer. We have a plausible naturalistic mechanism. We do not have a plausible designer.
How does something that is in every way designed as much or more than anything we've designed not be designed or be self creating to act and look designed. It is illogical and just doesn't make sense and the chances of it happening that way are impossible.
Personally, I'd like you to explain how you came to the conclusion that it was designed. What criteria did you use? How can "design" objectively be measured?
See, this runs into another important problem: our "design"? Part of nature. We, humans, are part of nature. This distinction we make between our design and natural processes is entirely artificial, and while it is a useful one to make in some scenarios (anthropology, for example), it's an utterly confusing one in the context of evolution.
Here's the essence of what I'm getting to. This complex machine?
Made by
nature. The fact that we made it does nothing to distract from the fact that we are a
part of nature. And while we can distinguish this as made by humans... Well, with things like early cells, how would we distinguish that? "Made by designer"... Yes, but which designer? How can demonstrate the existence of the designer? Is the designer part of nature? How do we find its fingerprints? How do we distinguish between something made by the designer and something made by nature?
I mean, this is a non-trivial problem when it comes to
humans. Some landscapes designed by professional architects will be designed explicitly to parallel naturally occurring landscapes. Certain naturally occurring structures look like they were carved by human tools, despite simply being the product of natural erosion. And we generally know what humans are capable of throughout history, what the hallmarks of human design are, and in many cases, we can go back and say, "Ah,
that's who designed that, there's their signature".
But now we're presented with an object you claim was designed. By a different designer. One whose signature we do not know; one whose capabilities we are unaware of; one whose hallmarks are unclear, and one whose
very existence is based on the claim that something must have been designed by this designer. I'm sorry,
that's not good enough. That's not how we recognize human design, that's not how we recognize
any sort of specified design.
We can objectively recognize specified design by looking at what we
know organism X has designed, and then comparing the object we have with what we know occurs
outside the purview of organism X and what we know organism X can and does do. Notice how this is necessarily dependent on the organism! If we were to look for evidence of beaver design, we would not use the same set of objects for our comparisons as if we were to look for evidence of bumblebee design, nor human design. In the case of human design, we have a wide and deep range of things to look at, and to compare to. We have language as a fairly clear distinguisher - something that non-human processes could produce only as a bizarre coincidence and which humans produce all the time. We have metalworking as a distinguisher. We have clayworking and pottery. And so on, and so forth.
So what do we
know your designer has designed? What do we know your designer can do? What have we established that this designer has designed? We haven't even established this designer's
existence yet? Well, shoot.
Look, if you want to provide some alternative objective way of determining whether something is designed or not, or whether something is designed by a particular entity or not, then by all means, let's hear it! Thus far, I have heard of no robust mechanism to distinguish design from non-design, particularly without any
established work of the designer in question. But you need to provide this mechanism, and it needs to be robust and testable. We should be able to take your mechanism and prove that things we know are designed are designed, and things we know are not designed (within a certain reference frame) are not designed (within that reference frame, see the "human = part of nature" thing above). Make any sense?
Evolution is good at making general predictions and theories. But when it is looked at more closely it begins to break down. It predicts the way life should form in a tree back to a common ancestor. But when we look closely at the evidence such as the genetic evidence it starts to bring up contradictions. Many unrelated animals are linked and many related animals have in-congruences. This is overcome by coming up with new ideas like convergent evolution. This happens a lot when a contradiction comes up and so evolutions ends up with many new ideas added as time goes by to side step the problems it encounters. So evolution has ways of never being wrong and changing the goal posts all the time.
Convergent evolution was predicted as far back as 1940 to explain the odd issue of homoplasy vs. homology, and fits perfectly into the core concept. Do you think that evolution is somehow the same theory that Darwin proposed? No. It's undergone numerous significant shifts - punctuated equilibrium, the genetic revolution, horizontal gene transfer... But the root of descent with modification and common ancestry has not shifted one bit. It is still fundamentally accurate.
If you would like to provide unrelated animals that are linked or related animals that have significant incongruences, I recommend you seek out one of the several tools used to construct cladistic tables, find all the relevant morphological similarities and differences between those animals and a bunch of randomly thrown-in organisms, and see if you can find an example where the results you discover do not match the tree of life we have now. Then, publish those results in a peer-reviewed journal, because what you have is a major discovery that is useful to the endeavor of science and directly contradicts the results of previous research.

Also, might wanna mention it here after you submit the manuscript. Look, this is a well-established scientific field, and the fact that you point to bats, birds, and pterosaurs as though they were somehow morphologically "similar" simply because they all can fly shows that you really don't know what you're talking about. This is a complex field, and you need to approach it with the attitude "I'm going to learn something", not "I'm going to debunk it all with no prior understanding thereof"!
It also uses circular reasoning in that the fossil evidence that life has evolved from simple to complex forms over the geological ages depends on the geological ages of the specific rocks in which these fossils are found. The rocks are then given geologic ages based on the fossil assemblages which they contain.
No, the rocks are dated radiometrically and stratigraphically. There is no assumption of evolution buried in the age of these fossils, and we do
not use fossils to date the rocks. Again, your ignorance of the field you are ostensibly trying to debunk is showing.
The problem is with convergent evolution is that we are finding more and more of it. In some cases there is genetic evidence that is also linking these unrelated animals together. So rather than being linked as two animals that may share a evolutionary relationship which would contradict evolution it is put down to a coincident. The two animals happen to evolve the same and even obtain the same genes but are unrelated.
I'm just going to say that this is not my strong suit and pass the ball off to someone who might know a little better.
@sfs ? @[serious] ?
