Given the political Right's attacks on U.S. academics as too liberal, we broach questions about knowledge production and curriculum development. We first explore how the Right has used arguments for freedom of speech and ideological diversity to undermine higher education's mission in the hope of polluting the public sphere with ideas that are deeply erroneous and destructive. We then describe the mission of higher education to serve as a "quality control" mechanism for ideas in the public sphere and reaffirm the importance of "academic freedom" in safeguarding that mission. We end by calling for communication and instruction scholars in particular, and academics in general, to safeguard their academic expertise against "Post-Truth" attacks.