Dear Editor: Hendrik van der Breggen (Second Opinion, August 23 2005) claims that intelligent design is a valid part of science. It's not; it is simply religion masquerading as science, intelligently designed to get around the US's separation of church and state. Van der Breggen erects several straw men and proceeds to knock them down. What he doesn't do, however, is address the real objections to intelligent design. First: the claims of intelligent design are simply wrong. For example, I dissected William Dembski's mathematical claims in a review published in the journal _BioSystems_. I concluded that he made fundamental mathematical errors that invalidated his arguments. Dembski has not addressed these errors. Second: even if correct, intelligent design offers nothing to science. It makes no predictions and suggests no experiments. Like Van der Breggen himself, those actively supporting intelligent design are typically not involved in laboratory research, but rather ensconced in philosophy departments, usually at religious schools. Third: separating "intelligence" from the rest of nature is a conceptual error. We know no example of a disembodied intelligence; all intelligences we know are located in biological systems that have evolved. Appealing to some magical "intelligence" to explain biology, therefore, is not based on any evidence. Jeffrey Shallit