Philosophers call it incommensurability—when the language and underlying concepts are so different, theorists cannot even have meaningful communication. Anyone who doubts the reality of incommensurability need look no farther than this weekend’s “What’s Behind It All? God, Science, and the Universe” debate, where Stephen Meyer explained the random nature of evolution and the limits of natural selection, and evolutionists Lawrence Krauss and Denis Lamoureux denied any such thing, insisting that evolution is not random because, after all, natural selection provides the direction and creates new designs. The funny thing about this particular instance of incommensurability is that the evolutionist’s argument, which is a standard line, is, itself, incommensurate with evolutionary theory. Read more