A manuscript accompanying the petition was presented in a near identical style and format to contributions that appear in "Proceedings of the National Academy of Sciences", a scientific journal, but upon careful examination was distinct from a publication by the U.S. National Academy of Sciences. Raymond Pierrehumbert, an atmospheric scientist at the University of Chicago, said the presentation was "designed to be deceptive by giving people the impression that the article … is a reprint and has passed peer review." Pierrehumbert also said the publication was full of "half-truths". F. Sherwood Rowland, who was at the time foreign secretary of the National Academy of Sciences, said that the Academy received numerous inquiries from researchers who "are wondering if someone is trying to hoodwink them."