How you plan to use sources in your paper will affect how you evaluate them. Not every source must directly support your thesis; sources can have a range of functions in a paper. They can do any of the following:
As you plan, you will need to think through the kinds of sources that will help you fulfill your purpose. The following are notes that one student took as she planned a paper.
Purpose: to persuade
My argument: that public funding for the arts should be granted on artistic merit alone and not on so-called decency standards
Sources I could use for background/context:
Sources that support my argument:
Source that represents an alternative viewpoint:
With her overall purpose in mind, the student judged each source according to the specific role it would play in her argument. For more examples of how student writers use sources for a variety of purposes, see 53c and 58c.
When you use sources in your writing, make a habit of evaluating, or judging the value of, those sources at each stage of your project. The following questions may help.