Design is a process whereby things are made fit for purpose. The concept of a perfect design is idealistic rather than realistic, but the intention of design, implicitly, is to approach perfection.
Yes, we see how human designers plan in advance the construction of a building or a machine of some kind, or even software, where the intent is to fit the purpose, as you say. In large projects where many people are sharing the task there is a great deal of collaboration just to assure that the purpose is completely understood in fine detail, that cross-purposes (cost vs quality, etc.) are worked out, and that all the risks to faulty design are mitigated.
wynn said:
To fit the purpose Hipparchia said. What is spina bifida good for, muscular dystrophy, cerebral palsy, leukemia, and a thousand more defects.
Hipparchia said:
The examples of non-perfect design cited by others above are so gross in their ineffectiveness that one could really only continue to assert conscious design by conceding that the designer was incompetent, or warped.
Yes, a warped designer can represented by the fictional mad scientist who sabotages the design of a space weapon in order to deliberately cause mayhem. More plausible, but rare, is the gross incompetence to exercise due diligence checking the design, such as the collapse of the bridge in Minnesota. More practical are the companies who design for obsolescence in order to force the client to return for a repair or upgrade. (Microsoft had this reputation.) But in all cases these implicate the designer for failing to strive for that ideal perfection.
wynn said:
Gross in their ineffectiveness to do what?
Again, to fit the purpose. The pupose of the red blood cell is to transport gases of respiration, not to rupture, sending the hemphiliac into crisis. The purpose of the pancreas is to regulate glucose, not to allow acidosis eat away at the retinas, appendages and kidneys. The purpose of the brain is to coordinate the body and provide the seat of conscious interaction with the world, not to dissolve reality into hallucinations and terror. In fact, you can redirect this question to every parent who had a child die in their arms, and to every hospital worker whose livelihood exists merely to clean up after the mess of this "ineffectiveness".
Hipparchia said:
If you wish to assert unconscious design that's fine. I believe we call that evolution by natural selection.
And that's not an admission, since we know that creatures migrate into and attempt to exploit habitats by chance - such as the seed blown by the wind. Whether or not they will thrive there is probabilistic. Conscious control over this would negate randomness. Therefore it cannot be conscious.
wynn said:
The complaints against the idea of intelligent design are based on an idealistic, vague notion of what something is supposed to be like. But so far, nobody has explained why things should be that way.
There's nothing vague about the purpose of lactation. It's not carcinoma. The machinery of the body is supposed to work. That is not only self-evident, it's evident in the formulating the ID hypothesis. ID says chance is removed from the picture - the random processes of mutation and natural selection. If they say chance is out, then they have to explain the return of chance for the cases of disease.
wynn said:
For example, why should humans not have an appendix? What exactly is wrong with having an appendix? Because it can get inflamed and be fatal?
And why is that bad? Can you explain?
The appendix is a vestigial organ, a consequence of evolution and the random way that vestigial organs did not cause problems in enough trials to be selected out. So in the first place it's one of several pieces of physical evidence that humans evolved from lower forms. The ID-ist would need to explain first of all why this organ was left to randomly cause sepsis if chance has been removed from mutation and natural selection. Second, they would need to explain why this deception was planted - that it only appears to be inherited from lower forms - as a way to throw off biologists in our era? The absurdity makes the whole issue moot.