Do you have a solution for a practical problem? Can you untangle a confusing question?
Can you make readers see a subject with new interest?
Argue for your viewpoint.
Although many teachers strictly forbid the use of Wikipedia as a source of information, the rest of us recognize it as (often) reliable enough to be part of a Works Cited page. (Please note, I said “part of.” Do not mistakingly translate “part of” as “the entire” Works Cited page.)