http://www.openculture.com/2018/01/carl-sagans-syllabus-final-exam-for-his-course-on-critical-thinking-cornell-1986.html

Though some of his examples (the language of cigarette advertisements, for instance) may look dated now, the course’s core principles have only grown more useful, and indeed necessary, with time — as Sagan, who wrote darkly of "the slow decay of substantive content in the enormously influential media," surely knew they would.