Some people think it's a bad idea to rely on the Internet for research or communication because it's a dangerous place where hackers or others with sinister motives can easily wreak havoc with the truth. That charge is sometimes leveled at Wikipedia, the free online encyclopedia that anyone can edit. While there is probably some incorrect information on the site, that doesn't mean you should dismiss Wikipedia as dangerous or without merit. This week I attended a speech by Jimmy Wales, the founder of Wikipedia, which is based in Florida.