"The fundamental problem with intelligent design is that you can't use it to explain the natural world. It's essentially a negative argument. It says, "Evolution doesn't work, therefore the designer did it. Evolution doesn't work, therefore we win by default." But when you ask them, "What does intelligent design tell you about nature? Does it tell you what the designer did? Does it tell you what the designer used to design something with? Does it tell you what purpose the designer had for designing something? Does it tell you when the designer did it? Why the designer did it?" It doesn't tell you anything like that. Basically, it's a negative argument. And you can't build a science on a negative argument."