What it means
When people have been deceived for a long time, they resist evidence that exposes the lie — admitting you were fooled is psychologically painful, so the mind protects itself by doubling down. Surrendering critical thinking to a manipulator creates dependency that is nearly impossible to break, because reversing course means confronting your own gullibility.
Relevance to Carl Sagan
Sagan spent his career fighting pseudoscience, astrology, and cult thinking — directly confronting charlatans who exploited public scientific illiteracy. His books Demon-Haunted World and Broca's Brain systematically dismantled fraud. He watched Cold War propaganda trap millions in false certainties, making skeptical thinking and epistemic humility the cornerstones of everything he wrote and broadcast.
The era
Sagan wrote primarily during the Cold War and early post-Cold War period, when state propaganda, televangelism, UFO cults, and New Age movements flourished alongside nuclear fear. Audiences were simultaneously receiving more scientific information than ever through television while being bombarded by misinformation. The tension between mass media's democratizing and manipulative potentials shaped his urgent case for skepticism.
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