When critics of ID try to define it out of existence by calling it religion or pseudoscience, it’s worth remembering that to this day scientists and philosophers have yet to settle on what is science and what isn’t. Critics who try to use such “demarcation” arguments against ID invariably end up excluding not only ID but also other things that they would like to count as science. Steve Meyer has written cogently on this very point. These articles by him have been out for a while, but they are well worth reviewing periodically: