Sometimes you can't always go with "almost always". Besides, the majority of the people who use it aren't going to go through each article they read and make sure the sources are there and creditable. That's why teachers and professors don't like it and you can also sometimes find a better source by searching on your own.

by Anonymous 13 years ago

There are people on Wikipedia that are paid to read all of the changes made to articles, check the sources or find a source, and either leave it if it's correct or delete/change it if it's not. Teachers don't like students using it because it makes the research process very simple and doesn't teach them how to research well.

by Anonymous 13 years ago