In a persuasive speech, supporting material is called "supporting evidence." They are the facts that support your claims.
| Note | Symbol Key: | Interpretation |
| ! = |
SUPERIOR |
You really backed up your claims with copious, relevant and trustworthy evidence. |
| + = |
EFFECTIVE |
You used good supporting evidence. |
| + = |
PROBLEMATIC |
There was not enough supporting evidence (or the evidence was weak or unrelated) |
| – = |
DETRIMENTAL |
You did not support your claims. |