Evidence is most effective in persuasive speaking when it is credible, new and what?

Evidence is most effective in persuasive speaking when it is credible, new, and specific because specificity adds clarity and relevance to the argument being presented. When evidence is specific, it provides concrete details and examples that help to illustrate the points being made. This specificity allows the audience to understand the depth of the information, making the argument more relatable and compelling.

Specific evidence ensures that the audience is not left with vague notions or generalizations; instead, they receive focused information that supports the speaker's claims. For instance, rather than saying "many people support this idea," a specific statement would include statistics or a detailed account that demonstrates the breadth and importance of support, such as "70% of participants in the recent survey agreed with this idea." This level of detail can significantly strengthen the speaker's position and persuade the audience to embrace the viewpoint being shared.