If you can't argue facts just hurl insults?
Well, we are discussing Coulter, after all. :-)
Sagan was known to have a bit of an ego. In 1994, Apple Computer began developing the Power Macintosh 7100. They chose the internal code name "Sagan", in honor of the astronomer. Though the project name was strictly internal and never used in public marketing, when Sagan learned of this internal usage, he sued Apple Computer to use a different project name. Though Sagan lost the suit, Apple engineers complied with his demands anyway, renaming the project "Butthead Astronomer". Sagan sued Apple for libel over the new name, claiming that it subjected him to contempt and ridicule. Sagan lost this lawsuit as well.