Is there a meaningful distinction between Creationism and ID?
Yes. Although Creationism can mean many different things to different people, in general the term is used to describe a belief based on the assumption that a literal interpetation of Genesis 1 & 2 is scientifically accurate. In contrast, Intelligent Design does not depend on any religious text or authority but depends solely on empirical evidence. Because ID does not assume any supernatural entity or religious authority it is worldview independent. ID also differs because, unlike Creationism, it has nothing to say about the age of the earth.
