Psychology
A claim can become 'true' just by being repeated loudly enough
An availability cascade is a self-reinforcing loop: a claim gets attention, its repetition alone makes it feel more plausible, and public pressure to agree pulls in more repeaters. Timur Kuran and Cass Sunstein traced the pattern through real panics like the Alar pesticide scare — where volume, not new evidence, did the persuading.