The review in the "Smithsonian" magazine and a review by the "New York Review of Books" pull different opinions on Sagan's attitude towards religious ideas. The "New York" review writes that " when it comes to the Supreme Extraterrestrial he is rather circumspect." An article by the University of Phoenix also agrees that Sagan carefully approaches the concept of religion. The article writes, "Readers should be aware that Sagan touches on sensitive areas in the cultural sphere, such as religion and where it stands in science, but handles the topics in such a way as to not offend." The Smithsonian article suggests that Sagan was very clear about his religious beliefs in the book for he "splits his universe in two, into science and irrationality." The "Smithsonian" goes on to say that Sagan's defined religious views fall within the area of an untestable claim, a type of claim he argues against in "The Demon-Haunted World".