Then the first step is clarifying the “young earth” vs “old universe” dichotomy within the ID crowd. Otherwise it’s hard to tell what we’re all actually arguing about; makes a big difference whether we’re discussing a premise where everything that exists can’t fit in the universe.
Well, maybe this will clear things up:
ID does not propose a young earth.
Now many of the contentions of ID are compatible with creationism, and some creationists do propose a young earth. However, there is no reciprocity there. Just because some people who believe in the ID hypothesis also believe in a young earth, does not mean that the ID hypothesis suddenly involves a young earth.