I would also consider my thesis undermined were it demonstrated that the rate of rationally-insightful contributions to TV Tropes was significantly higher than for other notable Wikis (e.g. Wikiversity).
How would you measure the rate of rationally-insightful contributions? I'm also not sure which wikis would be useful to test this on. Some wikis (such as say the various Wikipedias) have prohibitions on original research. Other wikis have narrow goals that will mimimze the number of rational insights. Thus, I'd expect a very low insight rate on say Wikispecies since that is devoted to cataloging existing biological knowledge.
This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.