When reading the writings of Darwinists and young-earth creationists, I am struck by how presuppositions control the course of their thinking. The two positions are at opposite ends of the spectrum of position, yet they have some features in common. Significantly, both Richard Dawkins and Ken Ham recognize two things about the universe. First, the universe appears to be ancient and second, it appears to be very well designed. But they both believe these appearances are an illusion. What they disagree on is what part is the illusion. Dawkins believes the earth is old and the inference of design is a misconception. Ham argues that the truth is the other way around: the world is designed but its origin is very recent. What is going on here? Controlling presuppositions are at work.