This link goes to a different library guide away from the CPELI Level 4 page to sources on controversial topics. When talking about controversial topics your instructor may have used other similar terms for your research assignment, such as hot topics, taking a stand, advocacy and argument, argumentation, pro and con, or persuasive essay/speech. Because of disagreements in controversial topics, books and articles often have biases, conclusions based on emotions or beliefs, facts taken out of context, and authors lacking authority. It is important to carefully evaluate all sources of information, especially websites.