A Twitter rumour cascade propagates through user retweets of a claim.

Evidence

The team were looking for all English-language tweets that constitute a ‘rumour cascade’. On Twitter, a cascade is initiated when a user makes a claim about a topic, which could involve, say, a short text message, a video, a photo or a link to an article. Other Twitter users then propagate the claim by retweeting it. — Sander van der Linden, Foolproof, 344

Categorization

• DEFINE: Defines a Twitter rumour cascade — the spreadable unit in misinformation research.