False and biased information is definitely a concern, especially on the open Web. I love that you are thinking about information and authority critically... it tells me you are getting the most out of your education. There is an excellent (though long) article that I would recommend that looks at information, media outlets, and politics critically. I think you would like it.
Why do we recommend evaluating the websites like we do? Credible sources are those written by experts (those with at least a master's degree in the field), and experts overwhelmingly hold themselves to a professional standard of truth that supersedes politics. There is still disagreement among experts on topics that we are still learning about, which is good and leads to new discovery. Expert disagreement is not a question of being wrong or right but making educated guesses that get refined over time as they encounter new information.
Bias is another area of concern. We are all biased, even experts. However, experts are often trained, as you are starting to be trained in college, to recognize and examine their biases. Acknowledging your bias helps you keep an open mind and present your ideas in a more balanced way. It's kind of like this: I'm a terrible speller. I know it (acknowledged). So, I really pay attention to what I write and look up words that don't look right. Did I mention that I'm an editor for a peer-reviewed journal? : ) It actually helps me be a better editor.
