Common knowledge is something that is generally known, however there is no clear boundary on what is considered common knowledge (Common Knowledge 1). Common knowledge can also carry the sense of “communal” knowledge—it is community information that no particular individual can fairly claim to own (Writing Center 1). Knowing when to cite common knowledge can be tricky. One way to tell whether or not a bit of information is common knowledge or not, is whether or not it is stated in five or more sources. So, if it’s known to educated people, or can be easily looked up, or appears in many sources, it is likely to be “common knowledge” and so does not need to be cited (Writing Center 2). However, if the information is not general knowledge to the educated public, then a proper citation is necessary. Because knowing when and when not to cite common knowledge can be an uncertainty, it is always best to just cite the information or ask a professor.
A paper should only consist of about ten percent of direct quotations. Therefore, in order to keep verbatim quotes to a minimum, one can paraphrase. Paraphrasing is “ones own rendition of essential information and ideas expressed by