How could ID science possibly work?
How does Evolutionary Theory work?
The theory of evolution makes assertions on the basis of the fact of evolution. The fact of evolution being; the observation of change in the hereditary traits of populations from generation to generation.
The theory of evolution asserts that the changes in population from generation to the next are foundamentally random.
Intelligent Design too has its factual basis. It has an observable basis also. It is evident whenever you act to do something. A dog does not act randomly, it acts on a desire to filful something. If it is hungry it does attempt to attack and kill a tree and eat a tree does it. The fact is that cars, electronics, woven clothe even, are products of human design.
The Theory of Intelligent Design is that just as we design things the world was designed. It appears that elements of the naturalistic world display to much compleixty to be random chance even if the quantifier was infinite. Or perhaps so extremely unlikely to be considered impossible.
The only thing on debate between Evolution and Intelligent Design is the attributes of cause. Science identifies facts. Evolution and Intelligent Design both have factual elements to them. The issue of cause is subjective according to worldview.
For example saying that there is no God is going to disagree with those who hold God's existence as a basic assumption of reality. While those who hold that God does not exist (Atheists, not Agnostics) will disagree with those who do. Both the Theories of Intelligent Design and Evolution are theories.
Science can provide knowledge but the interpretation of these facts enters the realm of conjecture. Both persepctives have valid intellectual positions. Both perspectives are intellectually sound according to different worldviews. And people of both positions with fight for them due a need for an integrity of belief.
So how does this relate to 'how could Intelligent Design science be possible?' Simple an emphasis that nothing exists that is not complex which can be seen as a basis for design. For example the atomic charts show structured reasons for why deferent elements are how they are. Which could also show evidence for an unstructured world if you see that why.
Teaching both the Theory of Evolution and the Theory of Intelligent Design seems to be the respectful thing to do. Both are reasonable philosophical perspectives.
Personally it seems that a scientific epistomology should have no trouble offer an understanding of a fact from the perspective that it was designed.