There are segments of Wikipedia that are (peripatetically, in some cases) moderating the submissions to this volume of information; depending on the verbiage and logic within the topic submissions I take it with either a convincing level of veracity or an incredulous mental spit-take. Given my personal experience of search topics (I still use yahoo, by virtue of the fact that I can search on a qouted phrase and get exact matching), the topics I find are at least factual, if not thorough.