primary source
Information you collect first-hand: interviews, surveys, observations, measurements and tests.
secondary source
Information someone else collected and published: articles, books, websites, manuals, videos.
synthesize
Combine information from several sources to find patterns, agreements and conflicts, and draw conclusions.
reliable source
A source you can trust because the author is knowledgeable, the information is current and supported by evidence, and the purpose is not just to sell something.
open question
A question that cannot be answered with yes or no, such as "How do you...?"
leading question
A question that pushes someone toward an answer, such as "Don't you agree this is better?"
citation
A note that tells where information came from, so others can check it and the source gets credit.