Firma-Mental

This word is a label for any person who believes or "knows" there is a "Firmament" over top of the sky, preventing any rockets from penetrating into "Outer Space."

"Whoo boy, that guy is 'Firma-Mental', he actually believes there's some kind of "firmament" barrier in the upper atmosphere that stops rockets escaping the Earth's atmosphere and reaching Outer Space! Even though rockets go up there all the time with nothing blocking them!"