Evidence

Evidence is, generally speaking, "something that furnishes proof." In debate, evidence usually refers specifically to quotations from experts that debaters use to support their arguments. "Evidence" is one of the categories of speaker points the judge can assign.

Individual quotes are usually formatted into blocks of text called "cards" and compiled into documents called "briefs". Because debaters are not allowed to research in-round, evidence they wish to use must be collected beforehand and stored. Many teams accumulate very large amounts of evidence by the end of a debate season, and must use roller cases to carry it from round to round.

Sourcebooks, commercial books of evidence that debaters can buy, are often available.