5 Criteria for use in evaluating information from Web sources 1. It is possible to accept a web page or site as useful without being able to determine the author, but only if everything else about the site seems to be wonderful. The answer lies in using more trusted sources before you check the web, that way you have something to compare the information to before deciding whether or not to use it. The important thing about bias is recognizing it, and deciding whether the bias of the author is going to interfere with the accuracy of the information. If you can't find any copyright or update dates, look at any indications in the body of your web source to see if there are indications of when it was loaded, if the sources used only go up to 1998, it may have been placed on the web about that time.
Coverage can be a great indicator that bias is involved.
If the site focuses on just certain sides of a question, this incomplete coverage can be an indicator that the author is biased.