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TV Tropes is a wiki, built on a PmWiki platform,[1] that collects and expands on various conventions and devices (tropes) found within creative works. Since starting in 2004, the site has gone from covering only television and film tropes to those in a number of other media.[2][3] The site is known for approaching topics in a comic tone[4] — author Bruce Sterling once described its style as "wry fanfic analysis"[5] — but Professor Robin Hanson characterized it as rather a possibly "great data source for studying fiction's functions."[6]