ID, like creation science, has goals that are primarily religious. - Eugenie Scott

Important to note is that Johnson is not trained as either a scientist or a theologian, nor has he ever practiced either discipline. His analysis of evolution is therefore based upon his own reading of the lay literature to which he has access and the interpretation on the scientific literature by popularizers. As a result, neither this book (Darwin on Trial) nor his subsequent ones provide a satisfactory scientific critique of biological evolution. Nor does it break new ground theologically. Nonetheless, its publication led to a large following, and he has had an active career on the lecture circuit as a result.

The critiques of evolution offered in such ID literature, however, is recognizable as a proper subset of the critiques offered by creation science literature, and they are no more valid.

In the creationist concept of created kind—and the creationist demand to “Show me macroevolution”—we have a classic example of the movable-goalposts strategy for winning. Any amount of evolution that can be demonstrated to the creationists’ satisfaction is effectively by definition microevolution within a kind. No matter how extensive the documented change is, the macroevolution goalposts are always out of reach. The inviolable biblical kind is protected with strategic vagueness.