What is Evidence?
An argument without evidence is not sufficient. Debaters are to give evidence. This may be logical reasons, assertions, quotations and, on prepared topics, may be expected to have basic research which includes statistics.
Debaters are obligated to provide a source, if asked by another debater. Evidence must be true. Students may assume a role, but fabricated facts may be cause for disqualification from prizes. However they may still ‘win’ the debate.