When researching a topic, you must make sure your sources are creditable so that your argument will then also be creditable. Some types of sources are better than others. For example, academic journals and peer reviewed articles are considered very creditable. on the other end of the spectrum, fictional novels aren't very good for sources. although ideas expressed in them are entertaining, it is all made up. in between these two extremes fall references such as general enclycopedias and reference books. although these are more creditable than fiction, the information is usally vage and generalized and can be outdated. the moral of the story is make sure your sources and creditable by using acedemic journals and such instead of newspapers, wikipedia, and fiction books.