CONCEPT
Availability Cascade
A self-reinforcing process in which a belief becomes widely held not because of evidence but because of its salience — vividness compounds repetition, repetition compounds cognitive availability, availability is mistaken for truth.
An availability cascade is the mechanism through which vivid, emotionally resonant, easily repeated claims achieve truth-status in public consciousness independently of evidential support. The concept, developed by Timur Kuran and Cass Sunstein, identifies a specific chain: a claim that is vivid and simple achieves wide distribution; wide distribution makes the claim cognitively available (it comes to mind easily when people assess the relevant situation); cognitive availability is mistaken for evidential support (the claim feels true because it is familiar); familiarity generates further repetition. Each repetition increases availability, which increases perceived credibility, which generates further repetition. The cascade is self-sustaining and largely immune to counter-evidence, because the availability heuristic through which humans assess probability operates beneath conscious evaluation.
In The You On AI Field Guide
The Death Cross chart that triggered the 2026 SaaS repricing functioned as a near-perfect catalyst for an availability cascade. It possessed every feature that makes claims cascade-prone: extreme vividness (a single image telling the entire story), strong emotional