Blog - Opinions made by people who have experienced it. May be reliable, but could be taking the mickey. Wiki site - Written by anyone so could mean nothing. Could also be truth. 50/50 chance though. Website - Depends on the site. If it is certified by people who know what they are talking about (doctors, professeurs etc.) then chances are they're reliable.

1) Generally speaking, the most reliable is a Wiki site, but you should not rely 100% on it either. I explain my views on Wikipedia here: http://www.answerbag.com/a_view/2207227 2) As far as blogs and web sites are concerned, it will depends on who is making them. For instance, the web sites of some particular institutions, news agencies and newspapers could be particularly reliable. Also the blogs of some particular persons. 3) If you want to check something, you need at least two sources. Consider that on the internet, rumors are very quickly spread. So when you compare two sources, check if it is really two sources, of if one was not just copying what said the other, or a common source. There are also some sites who spot those rumors, like "Snopes.com Urban Legends Reference Pages" http://www.snopes.com/ This particular site is very reliable. 4) If you are writing some homework, the situation is that many teachers still consider Wikipedia as a source to be avoided. Of course, they are mostly wrong, but you are not supposed to tell them this. So if you use Wikipedia for your homework, the best is not to quote Wikipedia (even if this is actually not righteous), but just quote the references that Wikipedia give. 5) last but not least, rely also on your own brain...

All 3 fall under the "not reliable" category. All three r subject 2 the opinions and bias of the editor, or author of the passages contained within. 4 petes sake I can get on wikipedia and edit a page myself. What kind of encyclopedia is that?