If virtually all DNA is found to be imbued with purpose, then this is predicted by, and evidence for Intelligent design. It also refutes the evolutionary notion of random processes and "leftover junk".
I may have missed something in an earlier post, but I fail to see the logic in this statement.
I will grant you that the term "junk DNA" is maybe the wrong term, but couldn't/wouldn't evolution account for DNA's usefullness.
The suggestion that there are left over chunks of DNA which are long forgotten evolutionary cast offs may be in fact incorrect, however, to my mind that indicates a problem with the mechanics of evolution, not with the theory of evolution.
Additionally, I think we would need to better understand this term "useful". For example, sickle cell anemia is an affliction, it's caused by two recessive genes. However, if you are a carrier with only one of the genes, you have an increased resistance to malaria.
In Africa, this is very useful. In Manhattan, it's not.
I would think that everything coded in the DNA sequence was at some point useful, but may not be useful now. How do we determine if this is proof of evolution or proof of ID.
You could say, "See, this is useful, it fights off malaria. Therefore ID"
I could say, "See, this is left over, people who aren't exposed to malaria are dying from sickle cell, therefore evolution."
Who is right?
Same can be said for wisdom teeth. They're great if you expect people to have lost a tooth or two before they reach 18.
I'm sure people here could name a hundred more examples.